🇬🇧 United Kingdom · Material quantities · Updated 2026
Construction materials calculator for United Kingdom
How many bricks, bags of cement, cubic metres of sand and square metres of roofing does a house in the United Kingdom actually need? These quantities are computed from the way buildings are built here — 300 mm external walls at 60 units per m², 1:4 mortar, 1:2:4 concrete and a 35° roof — not from a global average. Quantities only: material prices move week to week, so pricing happens against your own drawings.
Materials by house size in United Kingdom
| Floor area | Blocks / bricks | Cement (50 kg bags) | Sand (m³) | Roof covering (m²) |
|---|---|---|---|---|
| 50 m² | 9,332 | 138 | 8 | 85 |
| 90 m² | 12,520 | 221 | 12 | 144 |
| 120 m² | 14,457 | 280 | 15 | 188 |
| 150 m² | 16,163 | 335 | 17 | 232 |
| 200 m² | 18,664 | 427 | 22 | 304 |
| 250 m² | 20,867 | 519 | 26 | 375 |
| 300 m² | 22,859 | 607 | 30 | 446 |
Single-storey, computed from United Kingdom construction conventions. Cement totals include mortar, concrete, plaster and screed.
Full material takeoff — 150 m² house
Substructure
Trench excavation 50 m perimeter × 0.4 m wide × 0.6 m deep | 12 m³ |
Mass concrete footings 225 mm thick strip footing, mix 1:2:4 | 4.5 m³ |
Hardcore filling 150 mm bed under the ground slab | 22.5 m³ |
Blinding concrete 50 mm blinding over hardcore | 7.5 m³ |
Ground floor slab concrete 100 mm slab over 150 m² | 15 m³ |
Damp-proof course / membrane Slab area plus 10% laps | 165 m² |
Walling
External walling units (bricks/blocks) 102 m² face × 60/m² × 1.05 wastage | 6,426 no. |
Internal walling units 155 m² face × 60/m² × 1.05 wastage | 9,737 no. |
Mortar cement 5.3 m³ mortar at 1:4 | 41 bags (50 kg) |
Mortar sand 1:4 mix, dry factor 1.33 | 5.7 m³ |
Concrete & reinforcement
Cement — general concrete Footings and blinding, 12 m³ | 76 bags (50 kg) |
Cement — structural concrete Slabs, 15 m³ at 1:1.5:3 | 121 bags (50 kg) |
River / pit sand Combined concrete sand requirement | 11.6 m³ |
Coarse aggregate (stone) Combined concrete stone requirement | 23.2 m³ |
Reinforcement steel Slab 80 kg/m³, ring beam 110 kg/m³ | 1,420 kg |
Roofing
Roof covering area 173 m² plan opened out at 35° plus 10% laps | 231.6 m² |
Roof timber / trusses Trusses at ~1.2 m centres plus wall plates | 100 m run |
Ceiling boards Floor area plus 5% cutting | 157.5 m² |
Fascia, barge & rainwater goods Perimeter plus gable rake | 57.5 m run |
Finishes
Plaster / render area External face plus both faces of internal walls | 419.3 m² |
Cement — plaster 15 mm external, 12 mm internal, 1:4 | 40 bags (50 kg) |
Floor screed cement 40 mm screed at 1:3 | 57 bags (50 kg) |
Floor tiles / finish Floor area × 1.05 wastage | 157.5 m² |
Paint Two coats at 10 m² per litre per coat | 84 litres |
Joinery & services
Doors ~1 per 12 m² of floor area | 13 no. |
Windows ~1 per 14 m² of floor area | 11 no. |
Lighting points 0.12/m² | 18 no. |
Socket outlets 0.18/m² | 27 no. |
WC suites Typical fixture count per dwelling | 2 no. |
Wash hand basins Typical fixture count per dwelling | 2 no. |
Connection to municipal sewer Municipal sewer is the norm in this country | 1 item |
Go deeper on one material
What these numbers assume
- —Footprint taken as a 15 m × 10 m rectangle (150 m²), 1 storey.
- —Wall height 2.4 m; external walls 300 mm, internal 115 mm — the GB convention.
- —Openings deducted at 15% of external and 8% of internal wall face.
- —Foundation taken 0.6 m deep — governed by a design frost depth of 0.45 m.
- —Wastage allowance of 5% applied to bricks, tiles and paint.
- —Low seismic risk assumed.
- —Wind band: high. Roof tie-downs and fixings are additional to the timber quantities above.
Measure your actual plan instead of a rectangle
These quantities come from a representative footprint. Upload your dimensioned drawings and get the quantities measured off your real plan, priced in GBP (£).
Take off my drawingsBuilding materials in United Kingdom — frequently asked
How many bricks do I need to build a house in the United Kingdom?
+
For a 150 m² single-storey house built the way houses are built in the United Kingdom — 300 mm external walls at 60 units per m² — you need roughly 16,163 walling units including a 5% wastage allowance. Scale it from the table above for your own floor area.
How many bags of cement does a house need in the United Kingdom?
+
About 335 bags of 50 kg cement for a 150 m² single-storey house, across mortar (1:4), concrete (1:2:4), plaster and screed. Mixes are the ones conventionally specified here, so the figure moves if your engineer specifies richer mixes.
How much sand and stone will I need?
+
Roughly 17 m³ of sand and a comparable volume of coarse aggregate for a 150 m² house. Order by the load and account for bulking and compaction — delivered volume and placed volume are not the same number.
How accurate are these quantities?
+
They are geometry-derived planning quantities from a rectangular footprint, so they are the right order of magnitude and internally consistent — good enough to budget and to sanity-check a supplier's list. They are not a measured takeoff of *your* plan. For that, upload your drawings and get an itemised bill of quantities measured to NRM2 and priced in GBP.
Why are the quantities different from other countries?
+
Because the buildings are different. Wall thickness, block size, mortar and concrete mixes, foundation depth and roof pitch are all national conventions, and each one moves the quantities. This page is computed from the United Kingdom profile specifically, not a global average.