Builder Costs in Birmingham
West Midlands | Modelled planning ranges | Base prices dated May 2026 | Includes labour and materials
Cost Calculator
Estimated cost in Birmingham
£14,280 - £38,760
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Birmingham
Single Storey Extension
£14,280 - £38,760Labour
£8,160 - £20,400
Materials
£6,120 - £18,360
Typical duration: 6-12 weeks
Garage Conversion
£6,630 - £15,300Labour
£4,080 - £9,180
Materials
£2,550 - £6,120
Typical duration: 2-4 weeks
Internal Wall Removal
£714 - £2,346Labour
£510 - £1,530
Materials
£204 - £816
Typical duration: 1-3 days
Patio Construction
£1,326 - £4,590Labour
£816 - £2,550
Materials
£510 - £2,040
Typical duration: 2-5 days
How Birmingham Compares
Around the national average
Our model for Birmingham is 2% above the base estimate. This is a location assumption, not a measured local quote average.
Illustrative Seasonality for Builder Work
Our seasonal model peaks in Jul and is lowest in Jan. This is not live demand data or a forecast of prices or availability.
What Affects the Price
Single Storey Extension
- Extension size (square metres)
- Foundation type required by ground conditions
- Roof design (flat, pitched, or lean-to)
- Level of internal finish and specification
- Planning permission or permitted development status
Garage Conversion
- Garage size and structural condition
- Level of insulation and damp proofing needed
- Whether plumbing or electrics are required
- Quality of internal finish
Internal Wall Removal
- Whether the wall is load-bearing
- Steel beam size and specification
- Services (pipes, wires) running through the wall
- Making good to floor, ceiling, and adjacent walls
Patio Construction
- Patio area (square metres)
- Material choice (concrete slabs, natural stone, porcelain)
- Ground preparation and levelling
- Drainage and edging requirements
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Frequently Asked Questions
How much does a builder cost in Birmingham?
Builder prices in Birmingham typically range from £714 for internal wall removal to £38,760 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Birmingham?
Single Storey Extension in Birmingham costs between £14,280 and £38,760 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Birmingham?
Demand for builder work in Birmingham is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Birmingham above or below the national average?
Builder prices in Birmingham are around 2% above the national average, reflecting higher local labour rates and cost of living.
Builder prices in nearby towns
Other trade prices in Birmingham
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