UK Building Material Costs 2026: What Contractors Are Actually Paying

Bricks and Blocks

Facing Bricks

Facing brick prices cover an enormous range because the product covers an enormous range. A basic machine-made facing brick in a standard red or buff costs approximately £350–550 per 1,000 bricks at trade, delivered. A mid-range textured or multi-colour facing brick sits at £550–850 per 1,000. Premium hand-made or wire-cut bricks — the kind architects specify for visible elevations on quality new builds and extensions — run £900–1,800 per 1,000, and some specialist ranges push past £2,000.

The pricing trap I see catch developers repeatedly: specifying a premium brick in the design, getting the structural quantities right, then discovering the chosen brick is only available in packs of 400–420 from one regional distributor. The delivery lead time stretches to six weeks, you can't substitute on site, and the job programme slips. Always confirm availability and lead time before including a specific brick in a fixed-price contract. Your bricklayer can't lay bricks that haven't arrived.

Engineering bricks (Class B, the standard red engineering brick used for manholes, below-DPC work, and exposed retaining walls) cost approximately £480–680 per 1,000 trade. Class A engineering bricks — higher compressive strength, used for structures with very high loading — cost £650–950 per 1,000. Both are denser than facings, heavier to handle, and slower to lay.

Concrete Blocks

Standard dense aggregate 7N concrete blocks (440 × 215mm) in 100mm thickness: approximately £2.20–3.20 per block trade, which works out to roughly £22–32 per m² of blockwork material only. The 140mm version for loadbearing inner leaves: £2.80–4.00 per block. Lightweight aerated (aircrete) blocks — Thermalite, Celcon, or own-brand — in 100mm: £2.80–4.20 per block. Aerated blocks have better thermal performance (useful for meeting Part L regulations) and are lighter to handle, which speeds up laying time on inner leaves.

For foundation walls below DPC where you need durability rather than thermal performance, dense aggregate blocks at 7N or 10N are still the right choice. For above-DPC inner leaves of cavity walls in residential work, aerated blocks have largely replaced dense aggregate in most areas because of the thermal requirement.

Concrete and Aggregates

Ready-Mix Concrete

Ready-mix concrete is priced per cubic metre delivered. Standard C20 mix (suitable for domestic floor slabs, footings, and paths): £95–125/m³. C25 (general structural concrete, ground floor slabs for extensions): £105–135/m³. C30 (higher-specification structural elements, garage floors, drives subject to vehicle loading): £115–150/m³. C35 and above (specialist structural applications) starts at £130–170/m³.

Minimum loads vary by plant — typically 4–6m³ minimum, with a small load surcharge (usually £80–150) for anything below the minimum. If you need 2.5m³ for a small footing, you're often better off using volumetric (transit mixer) concrete or large bag mixes. Saturday and early-morning deliveries attract premiums of £20–40/m³ at most plants.

Pump hire adds approximately £350–600 per day for a standard boom pump, plus a pipeline surcharge per metre if the pour is a long way from where the truck can position. Always check access before you book concrete — a truck needs a firm, level surface capable of taking 32 tonnes, and it cannot reverse more than about 15 metres on most sites without a banksman arrangement.

Aggregates

Sharp sand (washed, for concrete and floor screeds): £35–55 per tonne delivered, per loose load. Building sand (soft sand, for mortar and render): £30–50 per tonne. MOT Type 1 (crushed stone, for sub-bases under drives, paths, and slabs): £28–45 per tonne. Shingle/gravel (10–20mm, for drainage and concrete aggregate): £32–52 per tonne.

Regional pricing varies significantly for aggregates because transport costs dominate. In areas close to quarries — the Pennines, Peak District, Mendips — Type 1 and sharp sand can be 20–30% cheaper than in areas where material has to travel. London aggregate prices routinely run 30–40% above national averages purely because of transport and urban logistics costs.

Structural Timber

C16 and C24 Structural Softwood

Structural timber prices have settled after the extreme volatility of 2021–2023 but remain higher than pre-pandemic levels. C16 carcassing timber (47 × 100mm, standard stud and joist sections): approximately £2.80–4.20 per linear metre depending on merchant and volume. C24 (higher-grade, typically used where spans or loads demand better structural performance): £3.50–5.50 per linear metre for the same section.

For floor joists, 47 × 195mm C24 — suitable for domestic floor spans up to around 4.5m at 400mm centres — costs approximately £8–12 per linear metre. Engineered timber (I-joists, LVL, glulam) is typically priced at around £12–25 per linear metre for residential floor beam sizes, and considerably more for large-span glulam sections. Engineered timber comes with structural design certification and is increasingly specified for longer spans where solid timber would require very deep sections.

OSB3 (oriented strand board, the standard structural sheathing board used for wall racking, floor decking, and roof sarking): 18mm in 2400 × 1200mm sheet costs approximately £18–26 per sheet. Plywood (structural, 18mm C+/C): £24–38 per sheet.

Timber Roof Trusses

Roof trusses are priced per truss based on span, pitch, and configuration, but as a general guide for a standard Fink truss (the common W-braced design used on most domestic roofs) at 8m span and 35° pitch, expect approximately £85–150 per truss supply only. Lead times from timber frame manufacturers are typically 4–8 weeks, which is one of the key programme constraints on a new build — trusses need to be ordered from the design stage, not when the walls reach plate level.

Insulation

Mineral Wool (Glass and Rock Wool)

Mineral wool is the most widely used insulation in UK residential construction. 100mm glass wool (75–80mm is also common for partial-fill cavity use) suitable for loft/floor use: approximately £3.50–5.50 per m². 50mm partial-fill cavity batt (designed to fit the inner face of a 100mm cavity, leaving a 50mm clear cavity): £3.00–4.80 per m². Full-fill cavity slabs (designed to completely fill the cavity — requires a wider cavity, typically 100mm+): £4.50–7.00 per m².

Rock wool (heavier, higher density) is preferred where fire resistance is a factor — separating floors in flats, fire compartment walls. 100mm acoustic/fire-rated rock wool: £6.00–9.50 per m².

Rigid Board Insulation

Rigid PIR (polyisocyanurate) board — used for flat roofs, warm roof build-ups, below-slab insulation, and where space is limited: 100mm in 1200 × 2400mm sheet costs approximately £28–42 per sheet (equivalent to roughly £10–15/m²). EPS (expanded polystyrene) is cheaper at £6–10 per m² for 100mm but has lower thermal performance per millimetre. Phenolic board (highest thermal performance) at 100mm: £18–28 per m².

Insulation pricing has been volatile — it was significantly higher in 2022–2023 during supply chain disruptions and has partially but not fully corrected. Buy ahead of programme if you can, as prices can move during a project.

Roofing Materials

Concrete and Clay Roof Tiles

Concrete interlocking tiles (Marley Mendip, Redland 49, and similar profiles — the standard across most of the UK for new build and re-roofing): £600–950 per 1,000 tiles trade. Coverage per tile varies by profile — typically 9–12 tiles per m² at standard gauge. Clay plain tiles (the traditional small format tile used across much of the South East and in conservation areas): £800–1,600 per 1,000 for standard machine-made clay, rising to £1,600–3,500 per 1,000 for handmade or specialist clay. Clay plain tiles use approximately 60 tiles per m², so the material cost alone for a clay plain tile roof runs £50–210/m² just for the tiles — before labour, battens, underlay, or fixings.

Slate — natural Welsh blue/grey slate or Spanish natural slate — costs approximately £1,800–4,500 per 1,000 for natural material. Fibre cement artificial slate (Marley Eternit Rivendale and similar): £750–1,100 per 1,000. Coverage for standard natural slates (500 × 250mm) is approximately 12–13 slates/m². Slate roofing is slower to lay than interlocking tiles and requires more skill — factor this into the labour comparison.

Flat Roofing

EPDM rubber membrane (the standard modern flat roofing material for extensions and garages): supply only approximately £4–8 per m² for single-ply membrane. Full system cost including insulation, deck board, bonding adhesive, and edge trims: typically £30–60/m² supply. GRP (glass-reinforced plastic, fibreglass) roofing: supply approximately £25–45/m². Both require specialist installation.

Roofing felt (type 5U underlay, used under tiles and slates): approximately £30–50 per roll (10m × 1m, covering approximately 10m² at standard lap). Breathable membrane (the modern alternative — Klober, Marley, or similar): £35–65 per roll (50m × 1.5m rolls are common, covering considerably more area).

Internal Materials

Plasterboard

Standard plasterboard (12.5mm, 2400 × 1200mm, the most common sheet for internal wall and ceiling linings): approximately £7.50–11 per sheet trade. Fire-rated (30-minute, used in stairwells, separating elements): £9.50–14 per sheet. Moisture-resistant (bathrooms, kitchens): £9–13 per sheet. Acoustic board (heavier, for sound-sensitive applications): £14–22 per sheet. Dot-and-dab adhesive (used to fix board to masonry walls): approximately £8–12 per 25kg bag, covering approximately 10m² at 3mm thickness.

Sand and Cement Render and Screed

Bagged render (Weber, K-Rend, and similar polymer-modified products): approximately £18–28 per 25kg bag, covering 3–6m² at 10mm thickness depending on the product. Traditional sand-and-cement scratch coat is much cheaper in raw materials (cement at £8–12 per 25kg bag, sand at £35–55/tonne) but requires a skilled plasterer and additional coats.

Floor screed (sand and cement, laid over insulation before floor finishes): approximately £25–50/m² supply and lay for traditional hand-laid screed at 65–75mm thickness. Liquid (flow) screed: £15–30/m² supply and lay, faster to install, self-levelling, and often thinner at 40–50mm — but requires specialist equipment and a longer curing period before foot traffic.

Buying Smarter: Practical Tips from Site

Open a Trade Account — Even on Small Projects

A trade account at a builders' merchant typically unlocks 10–25% discount off the standard counter price from day one of the account. Most merchants will open an account for any registered business, including sole traders. If you're a homeowner managing your own build or extension, consider using a main contractor who can buy materials through their account — the savings on a large materials order can easily justify their management fee.

Consolidate Deliveries

Delivery charges add up quickly on a project where materials are ordered piecemeal. A planned delivery of multiple materials at once — bricks, blocks, sand, cement, and insulation together — typically comes on one vehicle for one charge rather than four separate deliveries at four separate charges. Most merchants offer consolidated deliveries if you plan your orders by stage of work.

Watch Lead Times

The materials most likely to delay your programme are: bricks (specialist types, 4–10 weeks), roof trusses (4–8 weeks), windows and external doors (3–8 weeks depending on specification), and specialist steelwork. Everything else — blocks, concrete, sand, timber, plasterboard — is typically available from stock. Order the long-lead items the moment the design is fixed. Waiting until you need them is the single biggest cause of preventable programme delays.

Price Volatility and When to Lock In

Timber, steel, and insulation have all shown significant price volatility in the past four years. If your project is priced in spring and starts in autumn, the material price you used to price the job may no longer be available. For fixed-price contracts, either include a materials fluctuation clause or buy materials on order confirmation and hold them. The cost of dry storage is almost always less than the cost of a repriced materials list mid-job.