South West regional pricing
How Much Does a Builder Cost in Swindon?
Updated prices for . Swindon prices are typically 1% below the national average.
Price summary
Swindon Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £29,790 | £49,650 | £79,440 |
| Double Storey Extension | £49,650 | £84,405 | £139,020 |
| Loft Conversion | £24,825 | £44,685 | £74,475 |
Prices include labour and materials. VAT may apply. Based on South West regional pricing.
Full pricing
All Builder Prices in Swindon
Every price adjusted for Swindon using a 0.993x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £29,790 | £49,650 | £79,440 | 8-12 weeks |
| Double Storey Extension | £49,650 | £84,405 | £139,020 | 12-20 weeks |
| Loft Conversion | £24,825 | £44,685 | £74,475 | 6-10 weeks |
| Garage Conversion | £7,945 | £14,895 | £24,825 | 2-4 weeks |
| Porch Build | £2,485 | £4,470 | £7,945 | 1-2 weeks |
| Garden Wall | £795 | £1,490 | £2,980 | 2-4 days |
| Knock Through Internal Wall | £995 | £1,785 | £3,475 | 2-4 days |
| Chimney Breast Removal | £1,190 | £1,985 | £3,475 | 2-4 days |
| Underpinning | £4,965 | £11,915 | £24,825 | 2-4 weeks |
| Damp Proof Course | £495 | £1,190 | £2,485 | 1-3 days |
| New Build Garage | £9,930 | £17,875 | £29,790 | 3-5 weeks |
| Outbuilding or Garden Room | £11,915 | £24,825 | £49,650 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £995 | £1,785 | £2,980 | 1-2 days |
| Patio or Decking Build | £1,490 | £3,475 | £6,950 | 3-5 days |
Single Storey Extension
Low
£29,790
Average
£49,650
High
£79,440
8-12 weeks
Double Storey Extension
Low
£49,650
Average
£84,405
High
£139,020
12-20 weeks
Loft Conversion
Low
£24,825
Average
£44,685
High
£74,475
6-10 weeks
Garage Conversion
Low
£7,945
Average
£14,895
High
£24,825
2-4 weeks
Porch Build
Low
£2,485
Average
£4,470
High
£7,945
1-2 weeks
Garden Wall
Low
£795
Average
£1,490
High
£2,980
2-4 days
Knock Through Internal Wall
Low
£995
Average
£1,785
High
£3,475
2-4 days
Chimney Breast Removal
Low
£1,190
Average
£1,985
High
£3,475
2-4 days
Underpinning
Low
£4,965
Average
£11,915
High
£24,825
2-4 weeks
Damp Proof Course
Low
£495
Average
£1,190
High
£2,485
1-3 days
New Build Garage
Low
£9,930
Average
£17,875
High
£29,790
3-5 weeks
Outbuilding or Garden Room
Low
£11,915
Average
£24,825
High
£49,650
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£995
Average
£1,785
High
£2,980
1-2 days
Patio or Decking Build
Low
£1,490
Average
£3,475
High
£6,950
3-5 days
Regional comparison
How Swindon Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Swindon?
The South West has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Swindon, many properties in areas near Surrey and Kent vary in age and condition. Older properties with original features typically cost more for builder work due to additional preparation and access challenges.
The South West sits above the national average for trade costs, influenced by proximity to London and the generally higher cost of living. Labour rates in Swindon are typically 1% below the UK average. Despite this, there's a strong supply of qualified builder professionals across the region. Prices can vary 30-50% between different tradespeople for the same job, so getting multiple quotes is essential.
What you pay for builder work in Swindon depends on the complexity of the job, the materials used, and the condition of your property. Older detached and semi-detached homes often present more challenges that add to the cost. For larger jobs, expect to pay £49,650 to £139,020 for double storey extension in Swindon. Coastal properties in the South West may face additional considerations that affect pricing.
When getting quotes in Swindon, aim for at least three from different qualified professionals. Ask each one to visit and assess the work rather than quoting over the phone. A good builder will check the existing setup, identify complications, and provide a detailed cost breakdown. Be wary of quotes that seem significantly cheaper — they may be cutting corners on materials or quality. Always check qualifications, insurance and recent reviews.
More services
Other Services in Swindon
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UK-wide pricing
Builder Costs in Other Cities
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Common questions
Frequently Asked Questions
Common questions about builder costs in Swindon.