South East regional pricing
How Much Does a Builder Cost in Windsor and Maidenhead?
Updated prices for . Windsor and Maidenhead prices are typically 25% above the national average.
Price summary
Windsor and Maidenhead Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £37,590 | £62,650 | £100,240 |
| Double Storey Extension | £62,650 | £106,505 | £175,420 |
| Loft Conversion | £31,325 | £56,385 | £93,975 |
Prices include labour and materials. VAT may apply. Based on South East regional pricing.
Full pricing
All Builder Prices in Windsor and Maidenhead
Every price adjusted for Windsor and Maidenhead using a 1.253x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £37,590 | £62,650 | £100,240 | 8-12 weeks |
| Double Storey Extension | £62,650 | £106,505 | £175,420 | 12-20 weeks |
| Loft Conversion | £31,325 | £56,385 | £93,975 | 6-10 weeks |
| Garage Conversion | £10,025 | £18,795 | £31,325 | 2-4 weeks |
| Porch Build | £3,130 | £5,640 | £10,025 | 1-2 weeks |
| Garden Wall | £1,000 | £1,880 | £3,760 | 2-4 days |
| Knock Through Internal Wall | £1,255 | £2,255 | £4,385 | 2-4 days |
| Chimney Breast Removal | £1,505 | £2,505 | £4,385 | 2-4 days |
| Underpinning | £6,265 | £15,035 | £31,325 | 2-4 weeks |
| Damp Proof Course | £625 | £1,505 | £3,130 | 1-3 days |
| New Build Garage | £12,530 | £22,555 | £37,590 | 3-5 weeks |
| Outbuilding or Garden Room | £15,035 | £31,325 | £62,650 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £1,255 | £2,255 | £3,760 | 1-2 days |
| Patio or Decking Build | £1,880 | £4,385 | £8,770 | 3-5 days |
Single Storey Extension
Low
£37,590
Average
£62,650
High
£100,240
8-12 weeks
Double Storey Extension
Low
£62,650
Average
£106,505
High
£175,420
12-20 weeks
Loft Conversion
Low
£31,325
Average
£56,385
High
£93,975
6-10 weeks
Garage Conversion
Low
£10,025
Average
£18,795
High
£31,325
2-4 weeks
Porch Build
Low
£3,130
Average
£5,640
High
£10,025
1-2 weeks
Garden Wall
Low
£1,000
Average
£1,880
High
£3,760
2-4 days
Knock Through Internal Wall
Low
£1,255
Average
£2,255
High
£4,385
2-4 days
Chimney Breast Removal
Low
£1,505
Average
£2,505
High
£4,385
2-4 days
Underpinning
Low
£6,265
Average
£15,035
High
£31,325
2-4 weeks
Damp Proof Course
Low
£625
Average
£1,505
High
£3,130
1-3 days
New Build Garage
Low
£12,530
Average
£22,555
High
£37,590
3-5 weeks
Outbuilding or Garden Room
Low
£15,035
Average
£31,325
High
£62,650
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£1,255
Average
£2,255
High
£3,760
1-2 days
Patio or Decking Build
Low
£1,880
Average
£4,385
High
£8,770
3-5 days
Regional comparison
How Windsor and Maidenhead Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Windsor and Maidenhead?
The South East has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Windsor and Maidenhead, 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 Windsor and Maidenhead are typically 25% 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 Windsor and Maidenhead 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 £62,650 to £175,420 for double storey extension in Windsor and Maidenhead. Coastal properties in the South East may face additional considerations that affect pricing.
When getting quotes in Windsor and Maidenhead, 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 Windsor and Maidenhead
Explore costs for other services in the Windsor and Maidenhead 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 Windsor and Maidenhead.