Builder Costs in Wandsworth
London | Prices updated for 2026 | All estimates include labour and materials
Cost Calculator
Estimated cost in Wandsworth
£19,040 - £51,680
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Wandsworth
Single Storey Extension
£19,040 - £51,680Labour
£10,880 - £27,200
Materials
£8,160 - £24,480
Typical duration: 6-12 weeks
Garage Conversion
£8,840 - £20,400Labour
£5,440 - £12,240
Materials
£3,400 - £8,160
Typical duration: 2-4 weeks
Internal Wall Removal
£952 - £3,128Labour
£680 - £2,040
Materials
£272 - £1,088
Typical duration: 1-3 days
Patio Construction
£1,768 - £6,120Labour
£1,088 - £3,400
Materials
£680 - £2,720
Typical duration: 2-5 days
How Wandsworth Compares
More expensive
Trade prices in Wandsworth are typically 36% above the national average. This reflects local labour rates and the cost of living in London.
Seasonal Demand for Builder Work
Peak demand is typically in Jul, with the quietest period around Jan. You may find lower prices and better availability during off-peak months.
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
Builder Profiles Near Wandsworth
Find trusted, reviewed builder professionals near you. Tradesfolk is completely free to use.
Frequently Asked Questions
How much does a builder cost in Wandsworth?
Builder prices in Wandsworth typically range from £952 for internal wall removal to £51,680 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Wandsworth?
Single Storey Extension in Wandsworth costs between £19,040 and £51,680 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Wandsworth?
Demand for builder work in Wandsworth is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Wandsworth above or below the national average?
Builder prices in Wandsworth are around 36% above the national average, reflecting higher local labour rates and cost of living.
Looking for a builder in Wandsworth?
Browse verified builder profiles with reviews from local homeowners. 100% free.