Builder Costs in Swindon
South West | Modelled planning ranges | Base prices dated May 2026 | Includes labour and materials
Cost Calculator
Estimated cost in Swindon
£14,560 - £39,520
Single Storey Extension (medium (15-25 sqm))
Typical duration: 6-12 weeks
Builder Prices in Swindon
Single Storey Extension
£14,560 - £39,520Labour
£8,320 - £20,800
Materials
£6,240 - £18,720
Typical duration: 6-12 weeks
Garage Conversion
£6,760 - £15,600Labour
£4,160 - £9,360
Materials
£2,600 - £6,240
Typical duration: 2-4 weeks
Internal Wall Removal
£728 - £2,392Labour
£520 - £1,560
Materials
£208 - £832
Typical duration: 1-3 days
Patio Construction
£1,352 - £4,680Labour
£832 - £2,600
Materials
£520 - £2,080
Typical duration: 2-5 days
How Swindon Compares
Around the national average
Our model for Swindon is 4% 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
Builder Profiles Near Swindon
Find trusted, reviewed builder professionals near you. Tradesfolk is completely free to use.
Frequently Asked Questions
How much does a builder cost in Swindon?
Builder prices in Swindon typically range from £728 for internal wall removal to £39,520 for single storey extension. Prices include both labour and materials.
What is the average cost of single storey extension in Swindon?
Single Storey Extension in Swindon costs between £14,560 and £39,520 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a builder in Swindon?
Demand for builder work in Swindon is typically lowest in January. Booking during quieter months may mean better availability and competitive pricing.
Are builder prices in Swindon above or below the national average?
Builder prices in Swindon are around 4% above the national average, reflecting higher local labour rates and cost of living.
Builder prices in nearby towns
Other trade prices in Swindon
Looking for a builder in Swindon?
Browse local builder profiles with reviews from local homeowners. 100% free.