South West regional pricing

How Much Does a Builder Cost in North Somerset?

Updated prices for . North Somerset prices are typically 5% above the national average.

14 services priced
South West region
Updated

Price summary

North Somerset Price Summary

Service Low Average High
Single Storey Extension £31,590 £52,650 £84,240
Double Storey Extension £52,650 £89,505 £147,420
Loft Conversion £26,325 £47,385 £78,975

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

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Full pricing

All Builder Prices in North Somerset

Every price adjusted for North Somerset using a 1.053x cost multiplier, rounded to the nearest £5.

Single Storey Extension

Low

£31,590

Average

£52,650

High

£84,240

8-12 weeks

Double Storey Extension

Low

£52,650

Average

£89,505

High

£147,420

12-20 weeks

Loft Conversion

Low

£26,325

Average

£47,385

High

£78,975

6-10 weeks

Garage Conversion

Low

£8,425

Average

£15,795

High

£26,325

2-4 weeks

Porch Build

Low

£2,635

Average

£4,740

High

£8,425

1-2 weeks

Garden Wall

Low

£840

Average

£1,580

High

£3,160

2-4 days

Knock Through Internal Wall

Low

£1,055

Average

£1,895

High

£3,685

2-4 days

Chimney Breast Removal

Low

£1,265

Average

£2,105

High

£3,685

2-4 days

Underpinning

Low

£5,265

Average

£12,635

High

£26,325

2-4 weeks

Damp Proof Course

Low

£525

Average

£1,265

High

£2,635

1-3 days

New Build Garage

Low

£10,530

Average

£18,955

High

£31,590

3-5 weeks

Outbuilding or Garden Room

Low

£12,635

Average

£26,325

High

£52,650

3-6 weeks

Structural Steelwork (RSJ Installation)

Low

£1,055

Average

£1,895

High

£3,160

1-2 days

Patio or Decking Build

Low

£1,580

Average

£3,685

High

£7,370

3-5 days

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Regional comparison

How North Somerset Compares

Average cost of single storey extension across regions.

North Somerset
+5% £52,650
National Average
baseline £50,000
London
+24% £62,150

Local insights

What Affects Builder Costs in North Somerset?

The South West has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around North Somerset, 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 West sits above the national average for trade costs, influenced by proximity to London and the generally higher cost of living. Labour rates in North Somerset are typically 5% 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 North Somerset 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 £52,650 to £147,420 for double storey extension in North Somerset. Coastal properties in the South West may face additional considerations that affect pricing.

When getting quotes in North Somerset, 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.

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More services

Other Services in North Somerset

Explore costs for other services in the North Somerset area.

40 services — scroll to explore

Common questions

Frequently Asked Questions

Common questions about builder costs in North Somerset.

How much does a builder cost in North Somerset in 2026?
Single Storey Extension in North Somerset typically costs between £31,590 and £84,240, with the average being around £52,650. Prices vary depending on the scope of work, materials used, and the specific requirements of your property.
Are builder prices cheaper in North Somerset than London?
North Somerset prices are 5% above the national average, though still £9,500 cheaper than London for single storey extension.
How do I find a good builder in North Somerset?
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 North Somerset?
The main factors are the scope and complexity of what you need, the options and products chosen, and local market rates. North Somerset rates are 5% above the national average. Getting multiple quotes is the best way to ensure a fair price.
Do builder prices include materials in North Somerset?
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.