UK Building Material Costs 2026: What Contractors Are Actually Paying

Bricks and Blocks

Facing Bricks

Facing brick pricing covers a massive range, because the product itself covers a massive range. A basic machine-made facing brick in standard red or buff: roughly £350–550 per 1,000 at trade, delivered. Mid-range textured or multi-colour: £550–850 per 1,000. Premium hand-made or wire-cut bricks, the kind architects specify for high-visibility elevations on quality schemes: £900–1,800 per 1,000. Some specialist ranges push past £2,000.

The trap I see catch developers time and again: they specify a premium brick at design stage, get the quantities right, then find out the chosen brick only comes in packs of 400–420 from one regional distributor. Six weeks lead time. No substitution on site. Programme slips. Confirm availability and lead time before you put a specific brick in a fixed-price contract. Your bricklayer cannot lay bricks that are still in a factory in Staffordshire.

Engineering bricks (Class B, the standard red engineering brick for manholes, below-DPC work, and exposed retaining walls) run roughly £480–680 per 1,000 trade. Class A, with higher compressive strength for heavily loaded structures: £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 x 215mm) in 100mm: roughly £2.20–3.20 per block trade, about £22–32 per m² in materials only. The 140mm loadbearing version: £2.80–4.00 per block. Lightweight aerated blocks (Thermalite, Celcon, or own-brand) in 100mm: £2.80–4.20 per block. Aerated blocks have better thermal performance for Part L compliance and they're lighter, so laying is faster on inner leaves.

Below DPC, where durability matters more than thermal performance, dense aggregate 7N or 10N is still the right call. Above DPC on inner leaves of cavity walls in residential work, aerated has largely taken over because the thermal requirements push you there anyway.

Concrete and Aggregates

Ready-Mix Concrete

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

Most plants run a 4–6m³ minimum with a short-load surcharge of £80–150 for anything below that. Need 2.5m³ for a small footing? You're usually better off with a volumetric mixer or bagged mix. Saturday deliveries and early starts attract a £20–40/m³ premium at most plants.

Pump hire runs £350–600 per day for a standard boom pump, plus a per-metre surcharge if the truck can't get close to the pour. Check access before you book. A ready-mix truck needs a firm, level surface capable of taking 32 tonnes, and most drivers won't reverse more than 15 metres without a banksman in place.

Aggregates

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

Aggregate pricing is driven by transport costs more than any other factor. Close to quarries in the Pennines, Peak District, or Mendips, Type 1 and sharp sand can run 20–30% cheaper than in areas where the material has to travel. London pays 30–40% above the national average. That gap is purely diesel and urban logistics, nothing else.

Structural Timber

C16 and C24 Structural Softwood

Timber prices settled after the wild swings of 2021–2023 but haven't come back to where they were before the pandemic. They're not going to. C16 carcassing (47 x 100mm, standard studs and joists): roughly £2.80–4.20 per linear metre depending on merchant and volume. C24, for spans or loads where the structural engineer wants better grade: £3.50–5.50 per linear metre for the same section.

Floor joists in 47 x 195mm C24, which gets you to about 4.5m domestic spans at 400mm centres, run £8–12 per linear metre. Engineered timber (I-joists, LVL, glulam) starts at £12–25 per linear metre for residential floor beam sizes and goes up sharply for large-span glulam. The advantage is certified structural design and no need for very deep solid timber sections on longer spans.

OSB3 (the standard structural sheathing board for wall racking, floor decking, and roof sarking) in 18mm at 2400 x 1200mm: roughly £18–26 per sheet. Structural plywood, 18mm C+/C: £24–38 per sheet.

Timber Roof Trusses

Trusses are priced per unit based on span, pitch, and configuration. A standard Fink truss (the W-braced design on most domestic roofs) at 8m span and 35 degrees: roughly £85–150 per truss supply only. Lead times from truss manufacturers are typically 4–8 weeks. Order them at design stage, not when your walls hit plate level. That's one of the most common programme mistakes I see on new builds.

Insulation

Mineral Wool (Glass and Rock Wool)

Mineral wool is still the most common insulation in UK residential. 100mm glass wool for loft and floor use: roughly £3.50–5.50 per m². 50mm partial-fill cavity batt, sized to fit the inner face of a 100mm cavity while keeping a 50mm clear air gap: £3.00–4.80 per m². Full-fill cavity slabs, which close off the cavity entirely and need a 100mm+ cavity width: £4.50–7.00 per m².

Rock wool runs heavier and denser than glass wool. Where fire resistance matters, separating floors in flats or fire compartment walls, rock wool is the right choice. 100mm acoustic and fire-rated: £6.00–9.50 per m².

Rigid Board Insulation

Rigid PIR board, used for flat roofs, warm roof build-ups, below-slab insulation, and anywhere space is tight: 100mm in 1200 x 2400mm sheets costs roughly £28–42 per sheet, about £10–15/m². EPS is cheaper at £6–10 per m² for 100mm but you give up thermal performance per millimetre. Phenolic, the highest performer, runs £18–28 per m² at 100mm.

Insulation pricing spiked badly in 2022–2023 and hasn't fully recovered. If the programme allows, buy it ahead of when you need it. Prices can shift 10–15% between tender and installation on anything longer than a quick extension.

Roofing Materials

Concrete and Clay Roof Tiles

Concrete interlocking tiles (Marley Mendip, Redland 49, and similar profiles) are the standard across most of the UK for new build and re-roofing: £600–950 per 1,000 trade, with coverage typically 9–12 tiles per m² depending on profile. Clay plain tiles, the small-format traditional tile used across much of the South East and in conservation areas, run £800–1,600 per 1,000 for machine-made and £1,600–3,500 per 1,000 for handmade or specialist. Clay plain tiles need about 60 per m², so the material cost alone hits £50–210/m² before you've touched labour, battens, underlay, or fixings.

Natural slate (Welsh blue/grey or Spanish): £1,800–4,500 per 1,000. Fibre cement artificial slate (Marley Eternit Rivendale and similar): £750–1,100 per 1,000. Standard natural slates at 500 x 250mm cover about 12–13 slates per m². Slate is slower to lay than interlocking tiles and needs a more skilled roofer. Build that into the labour comparison before you go off the material cost alone.

Flat Roofing

EPDM rubber membrane (the go-to modern material for extension and garage flat roofs): single-ply membrane supply only is roughly £4–8 per m². The full system including insulation, deck board, bonding adhesive, and edge trims typically runs £30–60/m² supply. GRP (fibreglass roofing): supply at roughly £25–45/m². Both need specialist installation. Don't let a builder with no flat roofing experience touch either system.

Roofing felt (type 5U underlay under tiles and slates): roughly £30–50 per roll, 10m x 1m covering about 10m² at standard lap. Breathable membrane (Klober, Marley, and others) comes in larger 50m x 1.5m rolls at £35–65 per roll, considerably more area per roll than felt.

Internal Materials

Plasterboard

Standard plasterboard (12.5mm, 2400 x 1200mm, the workhorse sheet for walls and ceilings): roughly £7.50–11 per sheet trade. Fire-rated 30-minute board for stairwells and separating elements: £9.50–14 per sheet. Moisture-resistant for bathrooms and kitchens: £9–13 per sheet. Acoustic board for sound-sensitive applications: £14–22 per sheet. Dot-and-dab adhesive for fixing board to masonry walls: roughly £8–12 per 25kg bag, covering about 10m² at 3mm thickness.

Sand and Cement Render and Screed

Bagged polymer render (Weber, K-Rend, and similar): roughly £18–28 per 25kg bag, covering 3–6m² at 10mm depending on the product. Traditional sand-and-cement scratch coat is cheaper in raw materials (cement at £8–12 per 25kg bag, sand at £35–55 per tonne) but you need a skilled plasterer and it takes more coats to finish.

Floor screed (sand and cement over insulation, before floor finishes): roughly £25–50/m² supply and lay for hand-laid screed at 65–75mm. Liquid (flow) screed: £15–30/m² supply and lay. Flow screed is faster, self-levelling, and typically thinner at 40–50mm, but it needs specialist equipment and a longer curing period before you can put foot traffic on it.

Buying Smarter: Practical Tips from Site

Open a Trade Account — Even on Small Projects

A trade account at a builders' merchant typically gets you 10–25% off the counter price from day one. Most merchants will open one for any registered business, including sole traders. If you're a homeowner running your own project, using a main contractor who buys through their account can save enough on a large materials order to offset a fair chunk of their management fee.

Consolidate Deliveries

Delivery charges stack up fast on a piecemeal job. A planned delivery of bricks, blocks, sand, cement, and insulation together comes on one vehicle for one charge. Four separate deliveries is four separate charges and four separate windows waiting for each lorry. Most merchants will consolidate if you give them a bit of notice and plan your orders by stage of work.

Watch Lead Times

The materials most likely to kill your programme are specialist bricks (4–10 weeks), roof trusses (4–8 weeks), windows and external doors (3–8 weeks depending on spec), and specialist steelwork. Everything else, blocks, concrete, sand, timber, plasterboard, is typically from stock. Order long-lead items the day the design is fixed. Waiting until you need them is by far the most common cause of preventable programme delays I see.

Price Volatility and When to Lock In

Timber, steel, and insulation have all been volatile in the past four years and they're not settling back to pre-pandemic levels. Price a job in spring, start in autumn, and the figures you built your tender on may already be wrong. On fixed-price contracts, either include a materials fluctuation clause or buy materials on order confirmation and store them. Dry storage costs a fraction of what a repriced materials list mid-job will cost you.