South East regional pricing
How Much Does a Builder Cost in Dartford?
Updated prices for . Dartford prices are typically 9% above the national average.
Price summary
Dartford Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £32,730 | £54,550 | £87,280 |
| Double Storey Extension | £54,550 | £92,735 | £152,740 |
| Loft Conversion | £27,275 | £49,095 | £81,825 |
Prices include labour and materials. VAT may apply. Based on South East regional pricing.
Full pricing
All Builder Prices in Dartford
Every price adjusted for Dartford using a 1.091x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £32,730 | £54,550 | £87,280 | 8-12 weeks |
| Double Storey Extension | £54,550 | £92,735 | £152,740 | 12-20 weeks |
| Loft Conversion | £27,275 | £49,095 | £81,825 | 6-10 weeks |
| Garage Conversion | £8,730 | £16,365 | £27,275 | 2-4 weeks |
| Porch Build | £2,730 | £4,910 | £8,730 | 1-2 weeks |
| Garden Wall | £875 | £1,635 | £3,275 | 2-4 days |
| Knock Through Internal Wall | £1,090 | £1,965 | £3,820 | 2-4 days |
| Chimney Breast Removal | £1,310 | £2,180 | £3,820 | 2-4 days |
| Underpinning | £5,455 | £13,090 | £27,275 | 2-4 weeks |
| Damp Proof Course | £545 | £1,310 | £2,730 | 1-3 days |
| New Build Garage | £10,910 | £19,640 | £32,730 | 3-5 weeks |
| Outbuilding or Garden Room | £13,090 | £27,275 | £54,550 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £1,090 | £1,965 | £3,275 | 1-2 days |
| Patio or Decking Build | £1,635 | £3,820 | £7,635 | 3-5 days |
Single Storey Extension
Low
£32,730
Average
£54,550
High
£87,280
8-12 weeks
Double Storey Extension
Low
£54,550
Average
£92,735
High
£152,740
12-20 weeks
Loft Conversion
Low
£27,275
Average
£49,095
High
£81,825
6-10 weeks
Garage Conversion
Low
£8,730
Average
£16,365
High
£27,275
2-4 weeks
Porch Build
Low
£2,730
Average
£4,910
High
£8,730
1-2 weeks
Garden Wall
Low
£875
Average
£1,635
High
£3,275
2-4 days
Knock Through Internal Wall
Low
£1,090
Average
£1,965
High
£3,820
2-4 days
Chimney Breast Removal
Low
£1,310
Average
£2,180
High
£3,820
2-4 days
Underpinning
Low
£5,455
Average
£13,090
High
£27,275
2-4 weeks
Damp Proof Course
Low
£545
Average
£1,310
High
£2,730
1-3 days
New Build Garage
Low
£10,910
Average
£19,640
High
£32,730
3-5 weeks
Outbuilding or Garden Room
Low
£13,090
Average
£27,275
High
£54,550
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£1,090
Average
£1,965
High
£3,275
1-2 days
Patio or Decking Build
Low
£1,635
Average
£3,820
High
£7,635
3-5 days
Regional comparison
How Dartford Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Dartford?
The South East has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Dartford, 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 Dartford are typically 9% 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 Dartford 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 £54,550 to £152,740 for double storey extension in Dartford. Coastal properties in the South East may face additional considerations that affect pricing.
When getting quotes in Dartford, 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 Dartford
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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 Dartford.