North East regional pricing
How Much Does a Builder Cost in County Durham?
Updated prices for . County Durham prices are typically 14% below the national average.
Price summary
County Durham Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £25,920 | £43,200 | £69,120 |
| Double Storey Extension | £43,200 | £73,440 | £120,960 |
| Loft Conversion | £21,600 | £38,880 | £64,800 |
Prices include labour and materials. VAT may apply. Based on North East regional pricing.
Full pricing
All Builder Prices in County Durham
Every price adjusted for County Durham using a 0.864x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £25,920 | £43,200 | £69,120 | 8-12 weeks |
| Double Storey Extension | £43,200 | £73,440 | £120,960 | 12-20 weeks |
| Loft Conversion | £21,600 | £38,880 | £64,800 | 6-10 weeks |
| Garage Conversion | £6,910 | £12,960 | £21,600 | 2-4 weeks |
| Porch Build | £2,160 | £3,890 | £6,910 | 1-2 weeks |
| Garden Wall | £690 | £1,295 | £2,590 | 2-4 days |
| Knock Through Internal Wall | £865 | £1,555 | £3,025 | 2-4 days |
| Chimney Breast Removal | £1,035 | £1,730 | £3,025 | 2-4 days |
| Underpinning | £4,320 | £10,370 | £21,600 | 2-4 weeks |
| Damp Proof Course | £430 | £1,035 | £2,160 | 1-3 days |
| New Build Garage | £8,640 | £15,550 | £25,920 | 3-5 weeks |
| Outbuilding or Garden Room | £10,370 | £21,600 | £43,200 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £865 | £1,555 | £2,590 | 1-2 days |
| Patio or Decking Build | £1,295 | £3,025 | £6,050 | 3-5 days |
Single Storey Extension
Low
£25,920
Average
£43,200
High
£69,120
8-12 weeks
Double Storey Extension
Low
£43,200
Average
£73,440
High
£120,960
12-20 weeks
Loft Conversion
Low
£21,600
Average
£38,880
High
£64,800
6-10 weeks
Garage Conversion
Low
£6,910
Average
£12,960
High
£21,600
2-4 weeks
Porch Build
Low
£2,160
Average
£3,890
High
£6,910
1-2 weeks
Garden Wall
Low
£690
Average
£1,295
High
£2,590
2-4 days
Knock Through Internal Wall
Low
£865
Average
£1,555
High
£3,025
2-4 days
Chimney Breast Removal
Low
£1,035
Average
£1,730
High
£3,025
2-4 days
Underpinning
Low
£4,320
Average
£10,370
High
£21,600
2-4 weeks
Damp Proof Course
Low
£430
Average
£1,035
High
£2,160
1-3 days
New Build Garage
Low
£8,640
Average
£15,550
High
£25,920
3-5 weeks
Outbuilding or Garden Room
Low
£10,370
Average
£21,600
High
£43,200
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£865
Average
£1,555
High
£2,590
1-2 days
Patio or Decking Build
Low
£1,295
Average
£3,025
High
£6,050
3-5 days
Regional comparison
How County Durham Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in County Durham?
County Durham's housing stock is dominated by Victorian and Edwardian terraced houses, with large numbers of properties across the wider metropolitan area and surrounding towns. These older homes often present challenges for builder work, including limited access, older infrastructure and the need for more preparation. Properties that haven't been updated in decades tend to push costs toward the higher end of the ranges shown above.
The North East consistently sits below the national average for trade costs, and County Durham is no exception. Labour rates here are around 14% below the UK average and considerably lower than London or the South East. This reflects both the lower cost of living and a healthy supply of qualified builder professionals across the region. That said, prices can still vary by 30-50% between different tradespeople for the same job, making multiple quotes essential.
Several factors affect builder costs in County Durham. Back-to-back terraces may have limited access that makes work more complicated and expensive. Properties with solid walls rather than cavities can add to the difficulty. For larger projects, expect costs at the higher end — a double storey extension in County Durham typically runs £43,200 to £120,960. Material and product choices also make a significant difference to the total.
When getting quotes in County Durham, aim for a minimum of 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 conditions, identify potential complications, and provide a clear cost breakdown. Be wary of quotes that seem significantly cheaper than others — they may be cutting corners on materials or quality. Always check qualifications, insurance and recent reviews before hiring.
More services
Other Services in County Durham
Explore costs for other services in the County Durham area.
40 services — scroll to explore
UK-wide pricing
Builder Costs in Other Cities
Compare builder prices across the UK.
Common questions
Frequently Asked Questions
Common questions about builder costs in County Durham.