Room by Room
91 sources in the library on room by room, 38 on this page cited in a published note. Each one says what the document covers and what it is good for. Name a source to see which document it is and where to read it. One at a time. Page 1 of 3.
- very strong RN-1T7DXI cited
Department for Communities and Local Government
DCLG circular letter to building control bodies on the conservatory exemption. It says significantly reducing the glazing may remove the exemption, decided case by case by building control.
Cited in How to Modernise Refurbish Conservatory.
- very strong RN-KPWD3K cited
LABC Front Door
LABC's homeowner guidance on replacing a conservatory roof, which names inadequate foundations and supports as the main pitfalls when a heavier solid roof is fitted.
Cited in Conservatory Refurbishment Cost: 2026 UK Price Guide.
- very strong RN-AW0FCY cited
Ministry of Housing, Communities and Local Government
The second volume of Approved Document B, needed when a homeowner project crosses out of purely domestic use. Paragraph 0.1 draws the line: Volume 1 deals solely with dwellings INCLUDING blocks of flats, so a flat conversion stays in Volume 1, while Volume 2 covers every other building type. Table 0.1 sets the purpose groups: 1(a) flat, 1(b) dwellinghouse with a habitable storey at least 4.5m above ground up to 18m, 1(c) dwellinghouse with no habitable storey 4.5m above ground, then 2(a) residential institutional, 2(b) residential other (hotel, boarding house, hall of residence, hostel), 3 office, 4 shop and commercial, 5 assembly and recreation, 6 industrial, 7(a) storage and 7(b) car parks for vehicles up to 2,500kg gross. Its notes keep work within purpose group 1: surgeries, consulting rooms or offices forming part of a dwellinghouse and used by an occupant in a professional capacity stay in group 1 provided they total no more than 50m2, and a detached garage or open carport of no more than 40m2 stays in group 1(c). Paragraph 0.21 requires a separate purpose group for an ancillary use if that use is a flat, or if the building or compartment exceeds 280m2 and the ancillary use is more than one fifth of the total floor area; paragraph 0.22 requires separate purpose groups for genuinely independent uses such as shops with offices above, and the more onerous guidance applies where there is doubt. Paragraphs 0.23 and 0.24 require Volume 1 to be consulted as well for mixed use buildings that include dwellings, and paragraph 3.2 requires separate escape routes, or other effective protection of common escape routes, where a building has storeys or parts of storeys in different purpose groups.
Cited in Carpet Tile Installation Cost: 2026 UK Price Guide.
- very strong RN-NPO8FJ cited
Ministry of Housing, Communities and Local Government
The statutory figures behind a damp diagnosis, and the numbers to quote when a note explains why ground levels or a bridged damp proof course cause rising damp. Paragraph 5.2 requires that in an external wall the damp-proof course should be at least 150mm above the level of the adjoining ground (Diagram 8) unless part of the building protects the wall, and that in an external cavity wall the cavity should be taken down at least 225mm below the level of the lowest damp-proof course, or a damp-proof tray provided (Diagram 9a). For suspended timber ground floors it requires a ventilated air space of at least 75mm from the ground covering to the underside of any wall-plates and at least 150mm to the underside of the suspended timber floor or insulation, with ventilation openings on two opposing external walls of not less than 1,500mm2 per metre run of external wall or 500mm2 per square metre of floor area, whichever is greater; for suspended concrete floors the clear ventilated space is at least 150mm with the same opening sizes. Section 2.39 onwards covers radon, referring to BRE Report BR 211 for protective measures. The 2013 edition was published on 3 September 2013 with changes in effect from 1 October 2013.
Cited in Barge Boards, Fascias & Soffits: Cost & Replacement, Breathable Membranes for Roofs & Walls, Brick Slips & Brick Cladding Systems, Build Basement Cost: 2026 UK Price Guide and 46 more.
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Ministry of Housing, Communities and Local Government
Table 0.1a sets separating element performance for dwellings: purpose built walls a minimum 45 dB DnT,w + Ctr, floors and stairs 45 dB airborne and a maximum 62 dB L'nT,w impact; where a dwelling is formed by material change of use the figures relax to 43 dB airborne and 64 dB impact. Table 0.2 sets the laboratory value for new internal walls and floors within a dwelling at a minimum 40 dB Rw. Requirement E2 covers internal walls between a bedroom or a room containing a WC and other rooms, and internal floors, but expressly does not apply to an internal wall containing a door, a wall separating an en suite toilet from its own bedroom, or existing walls and floors in a material change of use. Section 5 gives internal wall types A to D and internal floor types A to C, including timber or metal stud with plasterboard and mineral wool; paragraph 5.14 requires all gaps around internal walls to be filled.
Cited in Acoustic Insulation for Floors & Walls, Acoustic Underlay & Soundproof Flooring, Ceiling Lights: Downlights vs Pendants vs Spots, Concrete Blocks: Aircrete vs Dense vs Hollow and 12 more.
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Ministry of Housing, Communities and Local Government
Table 1.1 sets minimum intermittent extract rates: kitchen with a cooker hood extracting outside 30 l/s, kitchen without one 60 l/s, utility room 30 l/s, bathroom 15 l/s, sanitary accommodation 6 l/s. Extract terminals and fans other than cooker hoods should be as high as practicable and no more than 400mm below the ceiling; a cooker hood should sit between 650mm and 750mm above the hob if the manufacturer gives no figure. Table 1.7 requires background ventilators of at least 8000mm2 equivalent area in habitable rooms and kitchens for a dwelling, 10,000mm2 for a single-storey dwelling. Background ventilators should be at least 1700mm above floor level and at least 500mm from a fan in the same room. On replacement windows, paragraph 3.14 says new windows must carry background ventilators no smaller than the originals, and paragraph 3.15 gives the fallback minimums where the old size is unknown: 8000mm2 habitable rooms, 8000mm2 kitchen, 4000mm2 bathroom. Paragraph 3.32 confirms that replacing an extractor fan or cooker hood on existing cabling is not notifiable.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, All You Need To Know About Double Glazing Repairs, Annexe & Granny Flat: Cost, Planning & Rules, Basement & Cellar Conversions: Cost and 57 more.
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Ministry of Housing, Communities and Local Government
The 2026 edition of Approved Document F Volume 1, supporting Requirement F1 and regulations 39, 40C, 42 and 44. It takes effect on 24 March 2027 in England for building work not connected with higher-risk building work, and on 24 September 2027 for work in connection with higher-risk building work, with transitional arrangements in Circular Letter 01/2026. The extract rates are unchanged from the 2021 edition: paragraph 1.13 requires extract to outside in kitchens, utility rooms, bathrooms and sanitary accommodation, and Table 1.1 keeps 30 l/s for a kitchen with a cooker hood extracting outside, 60 l/s where there is no hood or the hood does not extract outside, and 30 l/s for a utility room. Paragraph 1.16 keeps extract terminals within 400 mm of the ceiling and 1.17 keeps the cooker hood 650 to 750 mm above the hob. Paragraph 1.11 states background ventilator sizes are given as an equivalent area in mm2, not free area, measured to BS EN 13141-1, and 1.12 requires that equivalent area to be marked visibly from inside.
Cited in Trickle Vents & Background Ventilation.
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Ministry of Housing, Communities and Local Government
Requirement G3(4) states the hot water supply to any fixed bath must be designed so the water delivered to that bath cannot exceed 48 degrees C; paragraph 3.65 says this is achieved with an in-line blending valve or other temperature control device with a maximum temperature stop, and 3.66 accepts valves to BS EN 1111:1999 or BS EN 1287:1999 that fail safe. G3(3) requires unvented storage vessels to prevent stored water exceeding 100 degrees C and to convey safety discharge somewhere visible and safe. Regulation 36 and Requirement G2 cap potential consumption in a new dwelling at 125 litres per person per day, or the optional 110 litres per person per day where a planning condition specifies it; G2 applies only to dwellings erected or formed by material change of use. Sections G4 sanitary conveniences, G5 bathrooms and G6 food preparation areas set scale of provision.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Basins & Vanity Units: A Buyer's Guide, Bathroom Layouts & Planning, Boiler Replacement & Central Heating Costs (UK) and 7 more.
- very strong RN-505TW4 cited
Ministry of Housing, Communities and Local Government
Statutory guidance on sanitation. Paragraph 4.25 allows a WC with a macerator and pump only where there is also access to a WC discharging directly to a gravity system.
Cited in Creating a Downstairs Toilet: Cost & Rules, Understairs Storage & Toilet Ideas.
- very strong RN-XH6E39 cited
Ministry of Housing, Communities and Local Government
The standard that decides whether a loft ladder is legal and when a raised deck needs a balustrade. Published 3 January 2013, it covers protection from falling, collision and impact including stairs, ladders, ramps, guarding and vehicle barriers. Paragraph 1.31 states that retractable ladders must not be used as a means of escape. Paragraph 1.32 permits a fixed ladder, with fixed handrails on both sides, only for access in a loft conversion containing one habitable room, and only where there is not enough space without altering the existing space for a compliant stair, which is the rule that catches most loft ladder installations. Paragraph 1.29 restricts alternating tread stairs to loft conversions. For a private stair the maximum pitch is 42 degrees (Table 1.1 note 1), the normal relationship between rise and going is twice the rise plus the going between 550mm and 700mm, and for dwellings external tapered steps forming part of the building need a going of at least 280mm. Paragraph 3.1 requires guarding wherever it is reasonably necessary for safety at the edge of a floor, gallery, balcony, roof, light well, basement or similar sunken area. Paragraph 3.2 requires guarding to be at least the height in Diagram 3.1, allows any wall, parapet or balustrade to serve as guarding, and requires it to resist the loads in BS EN 1991-1-1 with its UK National Annex and PD 6688-1-1, with BS 6180 for barrier and infill panel design. Handrails should be positioned 900mm to 1000mm from the pitch line or floor.
Cited in All You Need To Know About Double Glazing Repairs, Basement & Cellar Conversions: Cost, Basement Conversion Cost & Feasibility (UK), Bifold Doors: Cost, Sizes & Alternatives and 56 more.
- very strong RN-5IVIKF cited
Ministry of Housing, Communities and Local Government
Paragraph 1645 of the M4(2) guidance requires a minimum 1,200 mm clear space in front of and between all kitchen units and appliances in living, kitchen and eating areas. Wall switches, socket outlets, stopcocks and controls must have their centre line between 450 mm and 1,200 mm above floor level (Diagram 1.5), consumer units are mounted with switches 1,350 to 1,450 mm above floor level, and boiler timer controls and thermostats between 900 mm and 1,200 mm. Communal approach routes and flights need a minimum clear width of 1,200 mm and every landing a minimum 1,200 mm clear of any door swing. Handrail guidance is measured 450 mm above the pitch line of the treads.
Cited in Bathroom Layouts & Planning, Bathroom Storage Solutions, Bathroom Tiles: Types, Cost & Layout, Creating a Downstairs Toilet: Cost & Rules and 16 more.
- very strong RN-R7QZ7M cited
Ministry of Housing, Communities and Local Government
Supports Part O of Schedule 1 to the Building Regulations 2010 (requirement O1 and regulation 40B); the 2021 edition took effect on 15 June 2022 in England, with transitional relief for work notified before that date and started before 15 June 2023. Critically, paragraph 0.3 limits the guidance to NEW residential buildings only (dwellings, residential institutional and residential other, plus shared communal rooms, common spaces and live/work units), and paragraph 0.7 applies it only to the residential parts of mixed-use buildings. Compliance is by the simplified method (Section 1) or dynamic thermal modelling to CIBSE TM59 (Section 2); the simplified method splits England into a high risk location (urban and some suburban London listed in Appendix C, with guidance for parts of central Manchester) and a moderate risk location (the rest of England). Table 1.1 (cross-ventilated) caps glazing as a percentage of floor area at north 15 high risk / 18 moderate, east 18/18, south 15/15, west 18/11, with the most glazed room capped at north 37/37, east 37/37, south 22/30, west 37/22. Table 1.2 (no cross-ventilation) caps glazing at north 15/18, east 11/18, south 11/15, west 11/11, most glazed room north 26/26, east 18/26, south 11/15, west 18/11.
Cited in Glass Box & Bifold Extensions: Cost & Ideas, Glazed Extensions: The Complete UK Guide, Glazing Explained: U-values, Low-E, Argon & Spacers, Rooflights & Skylights: Materials & Types.
- very strong RN-JYJ3I5 cited
Ministry of Housing, Communities and Local Government
The document that decides what electrical work a homeowner may legally do themselves, and the exact list of notifiable jobs. Regulation 12(6A), reproduced at paragraph 2.5, makes only three things notifiable: the installation of a new circuit, the replacement of a consumer unit, and any addition or alteration to existing circuits in a special location. Regulation 12(9) defines special location as, in a room containing a bath or shower, the zone extending vertically from finished floor level to 2.25 metres (or the shower head position if higher) and horizontally 600mm from the edge of the bath tub or shower tray. Paragraph 2.7 states that all other electrical installation work is not notifiable, namely additions and alterations to existing installations outside special locations, and replacements, repairs and maintenance anywhere. Paragraph 2.8 gives worked examples: a built-in cooker is not notifiable unless a new cooker circuit is needed, and connecting an electric gate or garage door to an existing isolator is not notifiable but running a new circuit from the consumer unit to that isolator is. Paragraph 2.2 confirms Part P reaches outdoor work including fixed garden lighting, pond pumps and outbuildings such as sheds, detached garages and domestic greenhouses. Notifiable work must be certified by self-certification by a registered competent person, third-party certification, or a building control body (paragraph 3.1), with the compliance certificate issued within 30 days (paragraph 3.4). Note that Approved Document P is a source of guidance rather than a ban: non-notifiable work still has to comply with BS 7671.
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Adding Plug Socket Room Cost: 2026 UK Price Guide, Annexe & Granny Flat: Cost, Planning & Rules, Awning Installation Cost: Patio & Garden Awnings and 114 more.
- very strong RN-LFIIEJ cited
Ministry of Housing, Communities and Local Government
the nationally described space standard, which sets the minimum gross internal areas, bedroom sizes, built-in storage and, at paragraph 10(i), the minimum floor to ceiling height of 2.3m over at least 75% of the gross internal area that a local plan may require of new homes
Cited in Adding an Ensuite: Cost, Layout & Plumbing, Garage Conversion Cost & Ideas (UK), House Extension Design Ideas, L-Shaped Dormer Loft Conversions: Cost & Layout and 5 more.
- very strong RN-70QMAN cited
Ministry of Housing, Communities and Local Government
The source that kills the widespread claim that Building Regulations set a minimum ceiling height in England. The gov.uk page states the standard is not a building regulation and remains solely within the planning system as a new form of technical planning standard, applied only where a local authority has adopted it in its Local Plan. The March 2015 standard itself (ISBN 978-1-4098-4567-6) sets Gross Internal Area minimums by bedrooms and bedspaces (3b4p notation) in Table 1, organised by storey height, and at paragraph 10(i) sets the minimum floor to ceiling height at 2.3m for at least 75% of the Gross Internal Area. Paragraph 2 records that the bedroom, storage and internal area requirements have no other statutory meaning or use. It also gives the counting rules: storage under stairs with 900 to 1500mm headroom counts at 50% of floor area and anything under 900mm not at all. Applies to new dwellings, not to extensions of existing houses.
Cited in House Extension Design Ideas.
- very strong RN-ZAFBT8 cited
Planning Portal
Sets out the conditions under which a conservatory is exempt from the building regulations: it must be single storey, less than 30 square metres in floor area, separated from the house by external quality walls, doors or windows, have an independent heating system with separate temperature and on/off controls, and have glazing and any fixed electrical installations that comply with the applicable building regulations requirements. It warns of a critical exception: any new structural opening between the conservatory and the existing house requires building regulations approval even where the conservatory itself is an exempt structure, which is the point that catches most knock-through and solid-roof conversion projects. It also cautions against building a conservatory that would restrict ladder access to windows serving rooms in a roof or loft conversion.
Cited in Conservatory Refurbishment Cost: 2026 UK Price Guide, Glazed Extensions: The Complete UK Guide, Orangery vs Conservatory vs Extension: Which Is Right?.
- very strong RN-0TPE6O cited
Planning Portal
Sets the two building regulations thresholds for a detached outbuilding such as a garden office, garden room or summerhouse. Approval is not normally needed where the floor area is less than 15 square metres and the building contains no sleeping accommodation. Where the floor area is between 15 and 30 square metres, approval is still not normally needed provided the building contains no sleeping accommodation and it is either at least one metre from any boundary or it is constructed substantially of non-combustible materials. The no-sleeping-accommodation condition is emphasised in the original and applies to both bands, so a garden room intended as a guest bedroom or annexe falls outside the exemption whatever its size.
Cited in Garden Room Cost & Complete Planning Guide (UK), Glazed Extensions: The Complete UK Guide, Plastic Shed Cost: 2026 UK Price Guide.
- very strong RN-8B9CFW cited
Planning Portal
Establishes that a conservatory is treated as an ordinary home extension for planning, falling under the same permitted development rules in Schedule 2, Part 1, Class A of the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and that limits apply to the total enlargement including any previous extensions. It notes that work adding over 100 square metres of floor space may be liable to the Community Infrastructure Levy. The rules apply to houses only, not to flats and maisonettes, not to houses created through change of use permitted development classes G, M, MA, N, P, PA and Q or through Schedule 2 Part 20 new dwellinghouses, and not where an Article 4 Direction or planning condition removes permitted development rights.
Cited in Conservatory Refurbishment Cost: 2026 UK Price Guide, Glazed Extensions: The Complete UK Guide.
- very strong RN-0IGANY cited
The National Archives
Regulation 27 of the Electricity Safety, Quality and Continuity Regulations 2002 sets the declared low voltage supply in Great Britain at 230 volts between phase and neutral, so a mains blind motor runs on a 230 V supply.
Cited in Bathroom Storage Solutions, Conservatory Blinds: Cost & Types.
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The National Archives (legislation.gov.uk)
The definitive list of what counts as a statutory nuisance in England and Wales, which is the legal hook for most neighbour and building-work complaints. Section 79(1) names, among others: (a) any premises in such a state as to be prejudicial to health or a nuisance, which is the route used against damp and disrepair; (b) smoke emitted from premises; (c) fumes or gases emitted from premises; (d) dust, steam, smell or other effluvia arising on industrial, trade or business premises; (e) any accumulation or deposit; (fb) artificial light emitted from premises, which covers security lighting; (g) noise emitted from premises; and (ga) noise from a vehicle, machinery or equipment in a street. Each limb requires the matter to be prejudicial to health or a nuisance. Section 79(1) also places a duty on every local authority to inspect its area for statutory nuisances and, where a person living in its area complains, to take such steps as are reasonably practicable to investigate. Section 79(1A) excludes matters caused by land being in a contaminated state, and section 79(2) excludes Crown defence premises from the smoke, artificial light and noise limbs.
Cited in Security Lighting & PIR Sensors.
- very strong RN-6H4YWI cited
The National Archives (legislation.gov.uk)
The regulation that carries the conservatory and outbuilding exemption itself, rather than a summary of it. Regulation 9 provides that the Building Regulations do not apply to the erection of any building or extension of a kind described in Schedule 2, which is where conservatories, porches and small detached buildings sit. It then carves back two things that still apply: the water efficiency requirements, for a greenhouse or small detached building or extension receiving a cold or hot water supply shared with or located inside a dwelling, and Part P of Schedule 1 on electrical safety, which applies to any greenhouse, any small detached building within class 6 of Schedule 2, and extensions taking electricity from a source shared with or inside a dwelling. A garden office wired from the house is therefore notifiable under Part P even when the building itself is exempt.
Cited in Glazed Extensions: The Complete UK Guide.
- very strong RN-E8PVDU cited
The National Archives (legislation.gov.uk)
Regulation 2 of the 2018 HMO licensing regulations makes it a licence condition that a room used for sleeping by one person over 10 is at least 6.51 m2 (10.22 m2 for two).
Cited in Does a Loft Conversion Add Value? UK Data & ROI, Walk-In Wardrobe Ideas & Cost.
- strong RN-XEZK0G cited
BSI
BS 6465-2:2017, in effect 31 July 2017, prepared by Technical Committee B/209 General building codes, current. It supersedes BS 6465-2:1996, which is withdrawn. It gives recommendations for the space required around all sanitary appliances so they are convenient in use and can be maintained and cleaned, which is the source for activity space and clearance dimensions in front of a WC, basin, bath and shower. It is one of a suite of four: Part 1 scales of provision, Part 3 selection and installation, Part 4 public toilets. As a code of practice its recommendations are guidance rather than specification, so a claim should be worded as recommended clearance, not a legal minimum.
Cited in Bathroom Layouts & Planning.
- strong RN-3LY0EO cited
BSI
The standard that supplies the imposed floor loading a home gym, a loft store or a mezzanine has to be checked against, and the material densities used to work out the dead load of a new floor build-up. Published 29 July 2002, current and under review, BS EN 1991-1-1 classifies actions, distinguishing self-weight from imposed loads, defines design situations, then gives densities of construction and stored materials, self-weight of construction works and imposed loads for buildings by category of use. A note that says a floor may not take a rack of weights or a large aquarium should point here, together with the UK National Annex, rather than to a rule of thumb.
Cited in Building a Home Gym: Cost & Setup (Garage or Spare Room), Skylights vs Roof Lanterns vs Roof Windows.
- strong RN-C3NSSX cited
BSI (British Standards Institution)
The code of practice behind every balustrade, balcony, landing and decking guard rail, and the standard Approved Document K points to for barrier loadings. Paywalled, so only the BSI catalogue page is public; it confirms the current edition is BS 6180:2011, published 31 March 2011, status Current but Under Review, from BSI committee B/208 and ICS 91.060.99. The catalogue page confirms it is a full revision of the 1999 edition and that the two substantive changes were the inclusion of Table 2, minimum horizontal imposed loads for parapets, barriers and balustrades, and changed rules on deflection at clause 6.4.1, so a note needing barrier load figures should cite Table 2 by name. It covers design, structure, height and strength of barriers in aluminium and copper alloys, concrete, plastic, steel, stone, wood and glass, temporary and permanent, including protective, crash and crush barriers and those imposing a speed limit up to 16 km/h. It expressly does NOT apply to spectator sports areas or buildings, construction sites, or barriers protecting children younger than 24 months.
Cited in Newel Posts, Spindles & Balustrades.
- strong RN-445W51 cited
BSI (British Standards Institution)
The accessibility code of practice that Approved Document M sits alongside. Paywalled, so only the catalogue page is public; it confirms BS 8300-2:2018, published 31 January 2018, status Current, and that it is part 2 of a two-part standard, with BS 8300-1:2018 (also published 31 January 2018, also Current) covering the external environment including parking, setting-down points, access routes and approaches to entrances. Part 2 covers external features affecting external access routes, and building interiors including entrances, reception facilities, horizontal and vertical movement and building facilities. Crucially for a home renovation note, the catalogue page states plainly that BS 8300-2 does NOT apply to individual dwellings; its residential scope is nursing, residential and care homes, student accommodation and the COMMON PARTS of blocks of flats. It also confirms the recommendations apply largely to new buildings but can be used to assess and improve existing ones, and that the extent to which they apply to listed and historic buildings is decided case by case.
Cited in Bathroom Storage Solutions, Choosing Paint Colours: A Practical Guide.
- strong RN-IKHYR0 cited
BSI (British Standards Institution)
The residential fire safety code of practice that professionals use as the alternative to the Approved Document B route, described by BSI as the UK most widely used fire safety standard. Paywalled, so only the catalogue page is public; it confirms the current edition is BS 9991:2024, page-dated 24 September 2025, status Current, and that it superseded BS 9991:2015, which was withdrawn on 21 November 2024, which in turn superseded BS 9991:2011, withdrawn 31 October 2015. Scope for the 2024 edition covers dwellings (single-family houses, self-contained flats or maisonettes), blocks of flats, residential accommodation blocks with individual bedrooms and kitchen or sanitary facilities, specialized housing and care homes. Care homes are new to the 2024 scope: the 2011 edition expressly excluded residential care and nursing homes. The earlier editions confirm the standard applies not only to new buildings but to material alterations, extensions and material changes of use of an existing building, which is why it is cited on loft conversions and flat conversions, and that it complements BS 9999, the equivalent code for non-residential buildings. The 2015 edition renamed sheltered and extra care housing as specialized housing and added expanded recommendations for escape from basements, lifts, power supplies, cluster accommodation and management of additional needs and disabilities.
Cited in PIR vs Mineral Wool Insulation Compared.
- strong RN-5XVQAQ cited
Electrical Safety First
States that sockets are not allowed in a bathroom or shower room, apart from shaver supply units, unless they can be fitted at least 2.5 m from the edge of a bath or shower tray. Shaver points are permitted within that 2.5 m provided they are SELV or conform to BS EN IEC 61558-2-5. Recommends a ceiling-mounted pull-cord switch in preference to a wall light switch because of dampness and wet hands. Confirms all circuits in or passing through bathrooms or shower rooms must be protected by an RCD. General guidance keeps outlets at least 30 cm from water or heat sources.
Cited in Heated Mirrors & Bathroom Extras.
- strong RN-8GJ5MS cited
HETAS
HETAS consumer advice on choosing a wood-burning stove. It explains heat output and warns that an oversized stove tends to be run at low output, risking slumbering.
Cited in Snug & Second Living Room Ideas.
- fair RN-AWYA9D cited
British Blind and Shutter Association
The BBSA report of tests at the University of Salford Energy House on an energy-efficient double-glazed window: honeycomb blind in a bead-fit frame 32 per cent less heat loss, standard roller blind 13 per cent.
Cited in Conservatory Blinds: Cost & Types.
- fair RN-FPQYWQ cited
Valuation Office Agency
The Valuation Office Agency explains that an improved home keeps its Council Tax band until it is sold or there is a general revaluation.
Cited in Boot Rooms & Pantries: Design & Cost.
- supplier figure RN-I8X9Q6 cited
Brett Martin
Manufacturer page for multiwall polycarbonate roofing sheet. It gives a U-value of 1.2 W/m²K for 32 mm 9-wall Marlon ST, a product fact for the comparison.
Cited in How to Modernise Refurbish Conservatory.
- supplier figure RN-E5UODE cited
Louvolite
The maker's page for the Perfect Fit system: a framed blind that clips into uPVC windows on spring brackets without drilling or screwing.
Cited in Conservatory Blinds: Cost & Types.
- supplier figure RN-YU82Z2 cited
Polymax
Supplier product page for a 1830 x 1220 x 17mm rubber stable mat priced at £47.99 including VAT, about £21.50 per square metre. Tier 5: a rubber matting supplier, used only for a supply price.
Cited in Building a Home Gym: Cost & Setup (Garage or Spare Room).
- supplier figure RN-YLQZ5Q cited
Saniflo
Saniflo's product page for the Saniaccess 1 WC macerator, giving its pumping limits (5 m vertical, 100 m horizontal) and its 22, 28 or 32 mm discharge pipework.
- supplier figure RN-8VK6EJ cited
Saniflo
Saniflo's product page for the Saniaccess 3 macerator gives its pumping range (5 m up, 100 m across) and its 22, 28 or 32 mm discharge pipework.
Cited in Understairs Storage & Toilet Ideas.
- supplier figure RN-6I6PI8 cited
Saniflo
The manufacturer's installation instructions for a Saniflo macerator. They require any lift before the horizontal run and a minimum 1:100 fall on horizontal discharge pipework.
- supplier figure RN-BMC0JC cited
Screwfix
A national merchant's product page for a 400 W Saniflo WC macerator described as ideal for cloakrooms. It shows a price of £514.99 including VAT.
- very strong RN-IU4DJS
Building Control Northern Ireland
Sets out the legal status of Northern Ireland's Technical Booklets, which differs from how Approved Documents are often described. Under Article 3 of the Building Regulations (NI) Order 1979 the Department of Finance makes the regulations, and it publishes Technical Booklets as guidance in support of them; there is no obligation to follow the methods or standards in the booklets, and any form of construction may be adopted provided the applicant can demonstrate to the district council that the requirements are met. The page also hosts free information sheets on converting an attic, alterations to conservatories, radon in dwellings, exemptions, ventilation, energy conservation, regularisation of unauthorised work, and the BCNI Construction Details updated November 2023.
- very strong RN-Q4AIP0
Building Control Northern Ireland
Dated April 2026, this is the clearest official statement anywhere in the UK on replacing a conservatory roof with a solid or insulated one. In Northern Ireland, if the replacement roof has less than three quarters of its area translucent, a Building Control application must be made to the council before work starts, under either a Building Notice or Full Plans. The application must give details of the replacement roof structure, covering and insulation, all complying with current Building Regulations, and a structural engineer's report is likely to be required to confirm the existing conservatory structure and foundations can carry the new roof loads. It warns that many existing conservatories were built as exempt structures and were never inspected, so the existing structure and foundations should be assessed by a suitably qualified professional before committing, and that necessary upgrading could prove prohibitive in cost and disruption.