South West regional pricing
How Much Does a Builder Cost in Bath?
Updated prices for . Bath prices are typically 7% above the national average.
Price summary
Bath Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £31,980 | £53,300 | £85,280 |
| Double Storey Extension | £53,300 | £90,610 | £149,240 |
| Loft Conversion | £26,650 | £47,970 | £79,950 |
Prices include labour and materials. VAT may apply. Based on South West regional pricing.
Full pricing
All Builder Prices in Bath
Every price adjusted for Bath using a 1.066x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £31,980 | £53,300 | £85,280 | 8-12 weeks |
| Double Storey Extension | £53,300 | £90,610 | £149,240 | 12-20 weeks |
| Loft Conversion | £26,650 | £47,970 | £79,950 | 6-10 weeks |
| Garage Conversion | £8,530 | £15,990 | £26,650 | 2-4 weeks |
| Porch Build | £2,665 | £4,795 | £8,530 | 1-2 weeks |
| Garden Wall | £855 | £1,600 | £3,200 | 2-4 days |
| Knock Through Internal Wall | £1,065 | £1,920 | £3,730 | 2-4 days |
| Chimney Breast Removal | £1,280 | £2,130 | £3,730 | 2-4 days |
| Underpinning | £5,330 | £12,790 | £26,650 | 2-4 weeks |
| Damp Proof Course | £535 | £1,280 | £2,665 | 1-3 days |
| New Build Garage | £10,660 | £19,190 | £31,980 | 3-5 weeks |
| Outbuilding or Garden Room | £12,790 | £26,650 | £53,300 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £1,065 | £1,920 | £3,200 | 1-2 days |
| Patio or Decking Build | £1,600 | £3,730 | £7,460 | 3-5 days |
Single Storey Extension
Low
£31,980
Average
£53,300
High
£85,280
8-12 weeks
Double Storey Extension
Low
£53,300
Average
£90,610
High
£149,240
12-20 weeks
Loft Conversion
Low
£26,650
Average
£47,970
High
£79,950
6-10 weeks
Garage Conversion
Low
£8,530
Average
£15,990
High
£26,650
2-4 weeks
Porch Build
Low
£2,665
Average
£4,795
High
£8,530
1-2 weeks
Garden Wall
Low
£855
Average
£1,600
High
£3,200
2-4 days
Knock Through Internal Wall
Low
£1,065
Average
£1,920
High
£3,730
2-4 days
Chimney Breast Removal
Low
£1,280
Average
£2,130
High
£3,730
2-4 days
Underpinning
Low
£5,330
Average
£12,790
High
£26,650
2-4 weeks
Damp Proof Course
Low
£535
Average
£1,280
High
£2,665
1-3 days
New Build Garage
Low
£10,660
Average
£19,190
High
£31,980
3-5 weeks
Outbuilding or Garden Room
Low
£12,790
Average
£26,650
High
£53,300
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£1,065
Average
£1,920
High
£3,200
1-2 days
Patio or Decking Build
Low
£1,600
Average
£3,730
High
£7,460
3-5 days
Regional comparison
How Bath Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Bath?
The South West has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Bath, 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 Bath are typically 7% above 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 Bath 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 £53,300 to £149,240 for double storey extension in Bath. Coastal properties in the South West may face additional considerations that affect pricing.
When getting quotes in Bath, 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 Bath
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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 Bath.