South East regional pricing
How Much Does a Builder Cost in Sevenoaks?
Updated prices for . Sevenoaks prices are typically 17% above the national average.
Price summary
Sevenoaks Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £35,100 | £58,500 | £93,600 |
| Double Storey Extension | £58,500 | £99,450 | £163,800 |
| Loft Conversion | £29,250 | £52,650 | £87,750 |
Prices include labour and materials. VAT may apply. Based on South East regional pricing.
Full pricing
All Builder Prices in Sevenoaks
Every price adjusted for Sevenoaks using a 1.17x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £35,100 | £58,500 | £93,600 | 8-12 weeks |
| Double Storey Extension | £58,500 | £99,450 | £163,800 | 12-20 weeks |
| Loft Conversion | £29,250 | £52,650 | £87,750 | 6-10 weeks |
| Garage Conversion | £9,360 | £17,550 | £29,250 | 2-4 weeks |
| Porch Build | £2,925 | £5,265 | £9,360 | 1-2 weeks |
| Garden Wall | £935 | £1,755 | £3,510 | 2-4 days |
| Knock Through Internal Wall | £1,170 | £2,105 | £4,095 | 2-4 days |
| Chimney Breast Removal | £1,405 | £2,340 | £4,095 | 2-4 days |
| Underpinning | £5,850 | £14,040 | £29,250 | 2-4 weeks |
| Damp Proof Course | £585 | £1,405 | £2,925 | 1-3 days |
| New Build Garage | £11,700 | £21,060 | £35,100 | 3-5 weeks |
| Outbuilding or Garden Room | £14,040 | £29,250 | £58,500 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £1,170 | £2,105 | £3,510 | 1-2 days |
| Patio or Decking Build | £1,755 | £4,095 | £8,190 | 3-5 days |
Single Storey Extension
Low
£35,100
Average
£58,500
High
£93,600
8-12 weeks
Double Storey Extension
Low
£58,500
Average
£99,450
High
£163,800
12-20 weeks
Loft Conversion
Low
£29,250
Average
£52,650
High
£87,750
6-10 weeks
Garage Conversion
Low
£9,360
Average
£17,550
High
£29,250
2-4 weeks
Porch Build
Low
£2,925
Average
£5,265
High
£9,360
1-2 weeks
Garden Wall
Low
£935
Average
£1,755
High
£3,510
2-4 days
Knock Through Internal Wall
Low
£1,170
Average
£2,105
High
£4,095
2-4 days
Chimney Breast Removal
Low
£1,405
Average
£2,340
High
£4,095
2-4 days
Underpinning
Low
£5,850
Average
£14,040
High
£29,250
2-4 weeks
Damp Proof Course
Low
£585
Average
£1,405
High
£2,925
1-3 days
New Build Garage
Low
£11,700
Average
£21,060
High
£35,100
3-5 weeks
Outbuilding or Garden Room
Low
£14,040
Average
£29,250
High
£58,500
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£1,170
Average
£2,105
High
£3,510
1-2 days
Patio or Decking Build
Low
£1,755
Average
£4,095
High
£8,190
3-5 days
Regional comparison
How Sevenoaks Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Sevenoaks?
The South East has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Sevenoaks, 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 East sits above the national average for trade costs, influenced by proximity to London and the generally higher cost of living. Labour rates in Sevenoaks are typically 17% 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 Sevenoaks 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 £58,500 to £163,800 for double storey extension in Sevenoaks. Coastal properties in the South East may face additional considerations that affect pricing.
When getting quotes in Sevenoaks, 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 Sevenoaks
Explore costs for other services in the Sevenoaks area.
40 services — scroll to explore
UK-wide pricing
Builder Costs in Other Cities
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Common questions
Frequently Asked Questions
Common questions about builder costs in Sevenoaks.