Buying materials through a builders’ merchant instead of a DIY shed typically saves 10–35% on core lines — but only if you know how trade pricing, accounts and delivery actually work. A standard flat-bed delivery costs £20–£80; a HIAB crane offload for heavier loads runs £150–£350. Opening a trade account costs nothing and typically unlocks 30-day credit plus prices 10–30% below the cash rate, simply for having one.
This guide brings our builders’ merchants library together in one place — how merchants work day to day, opening an account and using trade cards, getting and reading a quote properly, the specialist merchants worth knowing by trade, delivery and returns, and who should actually be doing the buying.
How Builders’ Merchants Work
A builders’ merchant sells construction materials wholesale to trades and the public rather than retail like a DIY shed. How builders’ merchants work explains that you don’t need a trade account to buy — you can walk in and pay cash or card — and that prices still run 10–35% below DIY retail on core lines. Builders’ merchant vs DIY store sets out where that saving is biggest — structural materials, 15–35% cheaper — versus where a DIY shed’s convenience still wins for small quantities. Buying outside a physical branch is increasingly common too: are online builders’ merchants cheaper covers the 10–25% saving on some lines that delivery charges can quietly erode on smaller orders.
Opening an Account & Using Trade Cards
A formal trade account is the biggest lever on price. How to open a builders’ merchant trade account covers the proof-of-business, two trade references and credit check most merchants require for 30-day terms and prices 10–30% below cash rates. Not ready for a credit account? How to get trade prices without a trade account covers cash accounts and other routes to a similar 10–35% discount. Free loyalty schemes are a smaller but genuine top-up: trade cards and loyalty schemes covers the 5–15% discounts on offer at merchants like Screwfix, Toolstation and Selco.
Getting — and Reading — a Quote
A merchant quote is not always what it first appears. How to read a builders’ merchant quote explains why figures are almost always ex-VAT, priced by unit rather than project quantity, and can hide delivery or small-order surcharges — comparing two or three merchants like-for-like typically saves 5–15%. Prices are also rarely fixed: how to negotiate with builders’ merchants covers the volume-order and branch-manager conversations that can cut a further 10–30% on some lines.
Specialist Merchants: Timber, Roofing, Plumbing, Electrical & More
General builders’ merchants don’t stock everything, and the specialists are usually cheaper within their own category. Timber merchants typically undercut DIY sheds by 15–35% on structural and joinery timber and add machining services a shed can’t. Roofing merchants run 15–30% below general merchants on tiles, slate and flat-roof materials, and plumbing and heating merchants offer 20–40% off DIY prices on pipework and heating components. Electrical wholesalers like CEF and Edmundson run a similar 20–40% below retail on cable and accessories, though most fixed wiring still needs a qualified electrician or Part P notification.
For finishes rather than fixings, tile shops and tile merchants covers the gap between sub-£10/m² trade tiles and £100+/m² showroom pricing, aggregate and sand suppliers explains why a loose tipper load is 20–40% cheaper per tonne than bulk bags above 5–6 tonnes, and reclamation yards covers what to check when buying salvaged brick, timber or fittings that match a period property’s character.
Delivery, Returns & Disputes
Getting materials to site is its own cost line. Builders’ merchant delivery costs and lead times covers the £20–£80 flat-bed drop, £150–£350 HIAB crane offload, and lead times from same-day on stocked commodities to 3–6 weeks on special orders. If something needs to go back, builders’ merchant returns and account terms explains the usual 28–30 day return window on stocked goods, why special orders are typically non-returnable, and the 15–25% restocking fee you can expect if a return is agreed anyway.
Comparing Merchants — and Who Should Buy
Not all merchants operate the same way. The big builders’ merchants compared sets out how national groups like Travis Perkins and Jewson differ from Selco’s cash-and-carry warehouse format and the more relationship-led regional model at MKM and Huws Gray. At the smaller trade-counter end, Screwfix vs Toolstation compares two chains similar enough that running accounts with both costs nothing and covers more stock gaps. And before any of this matters, it’s worth settling who buys the materials — you or the builder: builders typically mark materials up 10–25%, so buying direct can save money but shifts procurement risk and warranty responsibility onto you.
| Merchant Type | Typical Saving vs DIY Retail |
|---|---|
| General builders’ merchant | 10 – 35% |
| Timber merchant | 15 – 35% |
| Roofing merchant | 15 – 30% |
| Plumbing & heating merchant | 20 – 40% |
| Electrical wholesaler | 20 – 40% |
| Tile merchant (vs showroom) | 20 – 35% |
| Online builders’ merchant | 10 – 25% (before delivery) |
[!tip] Ask for the Trade Price Even Without an Account You don’t need a formal 30-day credit account to avoid paying full retail — many branches will move closer to trade pricing at the counter if you ask directly, buy in reasonable quantities, or mention you’re comparing quotes elsewhere. It costs nothing to ask before you pay.
Where to Start
If you’re buying materials for the first time, start with how builders’ merchants work to understand the basics before you walk into a branch. Spending regularly enough to justify credit terms? Opening a trade account is the single change most likely to cut your costs. And before you commit to any large order, run it past how to read a builders’ merchant quote — it’s the fastest way to catch hidden charges before they hit your invoice.
