North West regional pricing
How Much Does a Builder Cost in Knowsley?
Updated prices for . Knowsley prices are typically at the national average.
Price summary
Knowsley Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £29,880 | £49,800 | £79,680 |
| Double Storey Extension | £49,800 | £84,660 | £139,440 |
| Loft Conversion | £24,900 | £44,820 | £74,700 |
Prices include labour and materials. VAT may apply. Based on North West regional pricing.
Full pricing
All Builder Prices in Knowsley
Every price adjusted for Knowsley using a 0.996x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £29,880 | £49,800 | £79,680 | 8-12 weeks |
| Double Storey Extension | £49,800 | £84,660 | £139,440 | 12-20 weeks |
| Loft Conversion | £24,900 | £44,820 | £74,700 | 6-10 weeks |
| Garage Conversion | £7,970 | £14,940 | £24,900 | 2-4 weeks |
| Porch Build | £2,490 | £4,480 | £7,970 | 1-2 weeks |
| Garden Wall | £795 | £1,495 | £2,990 | 2-4 days |
| Knock Through Internal Wall | £995 | £1,795 | £3,485 | 2-4 days |
| Chimney Breast Removal | £1,195 | £1,990 | £3,485 | 2-4 days |
| Underpinning | £4,980 | £11,950 | £24,900 | 2-4 weeks |
| Damp Proof Course | £500 | £1,195 | £2,490 | 1-3 days |
| New Build Garage | £9,960 | £17,930 | £29,880 | 3-5 weeks |
| Outbuilding or Garden Room | £11,950 | £24,900 | £49,800 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £995 | £1,795 | £2,990 | 1-2 days |
| Patio or Decking Build | £1,495 | £3,485 | £6,970 | 3-5 days |
Single Storey Extension
Low
£29,880
Average
£49,800
High
£79,680
8-12 weeks
Double Storey Extension
Low
£49,800
Average
£84,660
High
£139,440
12-20 weeks
Loft Conversion
Low
£24,900
Average
£44,820
High
£74,700
6-10 weeks
Garage Conversion
Low
£7,970
Average
£14,940
High
£24,900
2-4 weeks
Porch Build
Low
£2,490
Average
£4,480
High
£7,970
1-2 weeks
Garden Wall
Low
£795
Average
£1,495
High
£2,990
2-4 days
Knock Through Internal Wall
Low
£995
Average
£1,795
High
£3,485
2-4 days
Chimney Breast Removal
Low
£1,195
Average
£1,990
High
£3,485
2-4 days
Underpinning
Low
£4,980
Average
£11,950
High
£24,900
2-4 weeks
Damp Proof Course
Low
£500
Average
£1,195
High
£2,490
1-3 days
New Build Garage
Low
£9,960
Average
£17,930
High
£29,880
3-5 weeks
Outbuilding or Garden Room
Low
£11,950
Average
£24,900
High
£49,800
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£995
Average
£1,795
High
£2,990
1-2 days
Patio or Decking Build
Low
£1,495
Average
£3,485
High
£6,970
3-5 days
Regional comparison
How Knowsley Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Knowsley?
Knowsley'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 West consistently sits below the national average for trade costs, and Knowsley is no exception. Labour rates here are around 0% above 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 Knowsley. 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 Knowsley typically runs £49,800 to £139,440. Material and product choices also make a significant difference to the total.
When getting quotes in Knowsley, 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 Knowsley
Explore costs for other services in the Knowsley 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 Knowsley.