East Midlands regional pricing
How Much Does a Builder Cost in Northampton?
Updated prices for . Northampton prices are typically 5% below the national average.
Price summary
Northampton Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £28,650 | £47,750 | £76,400 |
| Double Storey Extension | £47,750 | £81,175 | £133,700 |
| Loft Conversion | £23,875 | £42,975 | £71,625 |
Prices include labour and materials. VAT may apply. Based on East Midlands regional pricing.
Full pricing
All Builder Prices in Northampton
Every price adjusted for Northampton using a 0.955x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £28,650 | £47,750 | £76,400 | 8-12 weeks |
| Double Storey Extension | £47,750 | £81,175 | £133,700 | 12-20 weeks |
| Loft Conversion | £23,875 | £42,975 | £71,625 | 6-10 weeks |
| Garage Conversion | £7,640 | £14,325 | £23,875 | 2-4 weeks |
| Porch Build | £2,390 | £4,300 | £7,640 | 1-2 weeks |
| Garden Wall | £765 | £1,435 | £2,865 | 2-4 days |
| Knock Through Internal Wall | £955 | £1,720 | £3,345 | 2-4 days |
| Chimney Breast Removal | £1,145 | £1,910 | £3,345 | 2-4 days |
| Underpinning | £4,775 | £11,460 | £23,875 | 2-4 weeks |
| Damp Proof Course | £480 | £1,145 | £2,390 | 1-3 days |
| New Build Garage | £9,550 | £17,190 | £28,650 | 3-5 weeks |
| Outbuilding or Garden Room | £11,460 | £23,875 | £47,750 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £955 | £1,720 | £2,865 | 1-2 days |
| Patio or Decking Build | £1,435 | £3,345 | £6,685 | 3-5 days |
Single Storey Extension
Low
£28,650
Average
£47,750
High
£76,400
8-12 weeks
Double Storey Extension
Low
£47,750
Average
£81,175
High
£133,700
12-20 weeks
Loft Conversion
Low
£23,875
Average
£42,975
High
£71,625
6-10 weeks
Garage Conversion
Low
£7,640
Average
£14,325
High
£23,875
2-4 weeks
Porch Build
Low
£2,390
Average
£4,300
High
£7,640
1-2 weeks
Garden Wall
Low
£765
Average
£1,435
High
£2,865
2-4 days
Knock Through Internal Wall
Low
£955
Average
£1,720
High
£3,345
2-4 days
Chimney Breast Removal
Low
£1,145
Average
£1,910
High
£3,345
2-4 days
Underpinning
Low
£4,775
Average
£11,460
High
£23,875
2-4 weeks
Damp Proof Course
Low
£480
Average
£1,145
High
£2,390
1-3 days
New Build Garage
Low
£9,550
Average
£17,190
High
£28,650
3-5 weeks
Outbuilding or Garden Room
Low
£11,460
Average
£23,875
High
£47,750
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£955
Average
£1,720
High
£2,865
1-2 days
Patio or Decking Build
Low
£1,435
Average
£3,345
High
£6,685
3-5 days
Regional comparison
How Northampton Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Northampton?
The Midlands has a wide range of housing types, from Victorian terraces and back-to-backs to post-war council estates and modern developments. Northampton and surrounding areas like Solihull and Coventry have a large number of properties of varying ages and conditions. Older properties generally cost more for builder work due to the extra preparation and access challenges they present.
The East Midlands sits slightly below the national average for trade costs, making it one of the more affordable areas for builder work. Labour rates in Northampton are around 5% below the UK average. There's a good supply of qualified professionals across the Midlands, but prices still vary by 30-50% between tradespeople for the same job. Always get multiple quotes.
What you pay for builder work in Northampton depends on the job complexity, materials chosen, and the condition of your property. Older properties with solid walls or limited access can make work more disruptive and expensive. For larger projects, expect to pay £47,750 to £133,700 for double storey extension in Northampton. Material choices also make a significant difference to the total.
When getting quotes in Northampton, 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 conditions, identify potential complications, and give you a detailed breakdown of costs. Be wary of significantly cheaper quotes — they may cut corners on materials or quality. Always check qualifications, insurance and recent reviews.
More services
Other Services in Northampton
Explore costs for other services in the Northampton 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 Northampton.