Kitchen Renovation: The Complete UK Planning Guide

A kitchen renovation is one of the most disruptive projects in a home, and one of the most rewarding when done well. Unlike a bathroom where you can improvise with a shower at the gym, losing your kitchen means no cooking for weeks. Good planning is the difference between a project that runs smoothly and one that drags on with your family eating takeaways and navigating dust sheets.

This guide sets out the complete planning process: from deciding what you want to the final snag, covering layout principles, the correct order of trades, realistic costs and how long each stage takes.

Stage 1: Define the Brief and Budget Before Anything Else

Start with a written brief that separates must-haves from nice-to-haves:

• Does the layout need to change, or are the sink, cooker and fridge positions staying put?
• Are you opening the kitchen up to an adjoining room?
• What appliances are being replaced versus retained?
• What is the realistic total budget?

Getting the budget set before visiting showrooms prevents expensive scope creep. A mid-range kitchen renovation in a 12–20 m² room in 2026 should be budgeted at £12,000–£30,000 all-in. If you want to change the structure (remove a wall, create a kitchen-diner), add £3,000–£10,000. See our separate kitchen costs guide for a full breakdown.

Stage 2: Decide on the Layout

The Work Triangle

The work triangle, the path between sink, hob and fridge, is a traditional design rule of thumb rather than a regulation: keep the total to roughly 7 m or less, with each leg between about 1.2 m and 2.7 m. Triangles with legs shorter than 1.2 m feel cramped; legs over 2.7 m mean you’re walking too far between tasks. Most standard UK kitchen layouts (galley, L-shape, U-shape) achieve this naturally.

Common Kitchen Layouts

A practical minimum aisle width between facing base units, or between a base unit and an island, is about 900 mm for one person and 1,200 mm where two people cook. Building Regulations Part M’s optional accessible and adaptable standard for new homes (M4(2)) asks for a minimum 1,200 mm clear space in front of and between all kitchen units and appliances, rising to 1,500 mm in its wheelchair user standard (M4(3)); neither applies to refitting an existing kitchen, but 1,200 mm is worth planning for in open-plan settings.¹

Fixed Points: Where Plumbing and Electrics Live

The single biggest cost driver in layout planning is how far the fixed services move:

• Sink: drain pipes, water supply and waste outlets are the most expensive things to relocate. Moving the sink more than 1.5 m from its current position typically means running new pipework under the floor: budget £400–£1,200.
• Gas hob: the gas supply point should ideally be within 2 m of the new hob position. Moving it further means running a new branch, typically £350–£900, and anyone employed to do gas work in a home must be a Gas Safe registered engineer.²
• Electrical circuits: socket outlets rated up to 32 A, which covers ordinary kitchen sockets, need 30 mA RCD protection under BS 7671.³ An electric oven or hob normally has its own dedicated radial circuit sized to the appliance, not a ring circuit, and a dishwasher or washing machine is often given its own circuit or a fused spur, though that is not a requirement. If you’re altering the layout significantly, an electrician will often need to upgrade the consumer unit, budget £900–£1,800 for consumer unit replacement plus first-fix rewiring.

Stage 3: The Order of Work

Getting the sequence right is essential. Here is the standard order of work for a full kitchen strip and refit:

1. Structural work first, remove walls, install RSJs, create openings, form new door positions. This is the most disruptive phase and should be completely finished before any finishes work begins.
2. First-fix plumbing, rough-in new pipe positions, cap old supplies, extend soil pipe if required.
3. First-fix electrics, run new circuits, install back-boxes, lay underfloor heating cables if specified.
4. Plasterwork, skim any disturbed walls and let them dry before painting (a thin skim often dries within a week or two, new backing plaster can take several weeks; a moisture meter settles it).
5. Flooring substrate, self-levelling compound where required to even the floor.
6. Unit delivery and installation, base units first, then wall units, then tall units.
7. Worktop fitting, stone worktops require a separate templating visit 1–2 days after unit installation, then 5–10 working days for cutting.
8. Second-fix plumbing, connect sink, dishwasher, appliances.
9. Second-fix electrics, fit sockets, switches, under-cabinet lighting, connect appliances.
10. Tiling, splashback after worktops are fitted.
11. Flooring, LVT or tiles after units are in place to avoid cutting around legs.
12. Painting and decorating, walls, ceiling, skirting boards.
13. Snag and final clean.

What Goes Wrong When the Order Is Ignored

The most common mistakes:

• Tiling before worktops: tiles must be cut to fit precisely around the worktop, so the worktop must be in situ first. Tiling first means cutting twice or having a visible gap.
• Flooring under units: units sitting on final floor finish means any future unit replacement requires lifting floor sections.
• Painting before tiling: grout is difficult to keep off painted walls; professional tilers work to the tile edge, not the decorator’s line.
• Electrical second-fix before plumber: a leak during appliance connection can damage completed electrical work.

Stage 4: Managing the Trades

A kitchen renovation typically involves: a structural engineer (if walls are being removed), a builder/demolition contractor, a plasterer, a plumber, an electrician, a kitchen fitter, a tiler and a decorator. On a small project, one contractor may cover several of these; on a larger project, you will be coordinating several self-employed specialists.

Main Contractor vs. Direct Labour

You have two options:

• Main contractor: you hire one person or company who subcontracts and manages the trades. They take a management margin (typically 15–25%) but you have a single point of contact and contractual responsibility. Good for complex projects or if you are not available to coordinate day-to-day.
• Direct labour: you hire each trade directly, acting as your own project manager. Saves the margin but requires availability, experience in sequencing, and personal relationships with reliable trades. Expect 1–2 h/week of your own time managing this.

Building Regulations

A kitchen renovation rarely needs planning permission, because works that affect only the interior of a building are not development (a listed building still needs listed building consent).⁴ However, Building Regulations applications (Part P, electrics, Part L, insulation where external walls are disturbed) may be required:

• Part P: any new circuit or consumer unit change must either be carried out by a registered competent person (an electrician registered with NICEIC, NAPIT or equivalent) who self-certifies it, or be notified to building control before it starts.⁵ An unregistered contractor can still do the work but must submit for third-party inspection, add £200–£500 and 2–4 weeks to the process.
• Structural alterations: removing a load-bearing wall is a material alteration, so it needs Building Regulations approval and must meet Part A (structure).⁶ A structural engineer’s calculations are needed; allow £500–£1,200 for calculations and £200–£700 for Building Control fees and inspections.

Stage 5: Typical Timeline

The plaster dry-out phase is the one most homeowners underestimate. You cannot paint over fresh plaster, and kitchen steam accelerates the problem if units are in use before walls are fully dry. Good ventilation and a dehumidifier shorten the wait, but do not force-dry new plaster with high heat, which can cause cracking.

Protecting Your Investment

Contracts and Payment Terms

For any job over £2,000 with a single contractor, use a written contract specifying scope, materials, start date, completion date and payment milestones. Standard payment terms: 25–30% on start, 50% at unit installation, final 20–25% on completion and snag sign-off. Never pay 100% upfront.

Warranties

• Unit carcases: most mid-range and premium manufacturers offer 10–25 year warranties on carcases. Read the exclusions carefully, damage from flooding or incorrect fitting usually voids them.
• Worktops: quartz worktops typically carry a 10-year warranty against manufacturing defects; stone requires periodic sealing to maintain it.
• Appliances: standard manufacturer warranty is 1–2 years; extended warranties are worth comparing against the cost of repair on a like-for-like basis.

Resale Value

A well-specified kitchen renovation in a property currently below the local average kitchen standard can recover much of its cost in added sale value, but only up to the ceiling for the street. Installing a £50,000 kitchen in a £350,000 terraced house is unlikely to recover the outlay at sale. Match the specification to the value bracket of the property and the expectations of likely buyers.