North West regional pricing

How Much Does a Builder Cost in Bolton?

Updated prices for . Bolton prices are typically 11% below the national average.

14 services priced
North West region
Updated

Price summary

Bolton Price Summary

Service Low Average High
Single Storey Extension £26,610 £44,350 £70,960
Double Storey Extension £44,350 £75,395 £124,180
Loft Conversion £22,175 £39,915 £66,525

Prices include labour and materials. VAT may apply. Based on North West regional pricing.

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Full pricing

All Builder Prices in Bolton

Every price adjusted for Bolton using a 0.887x cost multiplier, rounded to the nearest £5.

Single Storey Extension

Low

£26,610

Average

£44,350

High

£70,960

8-12 weeks

Double Storey Extension

Low

£44,350

Average

£75,395

High

£124,180

12-20 weeks

Loft Conversion

Low

£22,175

Average

£39,915

High

£66,525

6-10 weeks

Garage Conversion

Low

£7,095

Average

£13,305

High

£22,175

2-4 weeks

Porch Build

Low

£2,220

Average

£3,990

High

£7,095

1-2 weeks

Garden Wall

Low

£710

Average

£1,330

High

£2,660

2-4 days

Knock Through Internal Wall

Low

£885

Average

£1,595

High

£3,105

2-4 days

Chimney Breast Removal

Low

£1,065

Average

£1,775

High

£3,105

2-4 days

Underpinning

Low

£4,435

Average

£10,645

High

£22,175

2-4 weeks

Damp Proof Course

Low

£445

Average

£1,065

High

£2,220

1-3 days

New Build Garage

Low

£8,870

Average

£15,965

High

£26,610

3-5 weeks

Outbuilding or Garden Room

Low

£10,645

Average

£22,175

High

£44,350

3-6 weeks

Structural Steelwork (RSJ Installation)

Low

£885

Average

£1,595

High

£2,660

1-2 days

Patio or Decking Build

Low

£1,330

Average

£3,105

High

£6,210

3-5 days

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Regional comparison

How Bolton Compares

Average cost of single storey extension across regions.

Bolton
-11% £44,350
National Average
baseline £50,000
London
+24% £62,150

Local insights

What Affects Builder Costs in Bolton?

Bolton'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 Bolton is no exception. Labour rates here are around 11% below 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 Bolton. 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 Bolton typically runs £44,350 to £124,180. Material and product choices also make a significant difference to the total.

When getting quotes in Bolton, 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.

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More services

Other Services in Bolton

Explore costs for other services in the Bolton area.

40 services — scroll to explore

Common questions

Frequently Asked Questions

Common questions about builder costs in Bolton.

How much does a builder cost in Bolton in 2026?
Single Storey Extension in Bolton typically costs between £26,610 and £70,960, with the average being around £44,350. Prices vary depending on the scope of work, materials used, and the specific requirements of your property.
Are builder prices cheaper in Bolton than London?
Yes. Bolton builder costs are typically 11% below the national average, while London prices run around 24% above it. For single storey extension, you could save over £17,800 compared to the same job in London.
How do I find a good builder in Bolton?
Get at least three quotes from different tradespeople, check recent reviews, and ask whether the quote includes VAT and everything you need. A detailed written quote that breaks down all costs is a good sign. Always check qualifications, insurance and recent reviews before hiring.
What affects builder prices in Bolton?
The main factors are the scope and complexity of what you need, the options and products chosen, and local market rates. Bolton rates are 11% below the national average. Getting multiple quotes is the best way to ensure a fair price.
Do builder prices include materials in Bolton?
The prices shown on this page include all typical costs. However, when getting real quotes, always confirm what is and isn't included. Some tradespeople break out costs separately, while others give an all-in price. Ask for a detailed breakdown before agreeing to any work.