East of England regional pricing

How Much Does a Builder Cost in Brentwood?

Updated prices for . Brentwood prices are typically 19% above the national average.

14 services priced
East of England region
Updated

Price summary

Brentwood Price Summary

Service Low Average High
Single Storey Extension £35,670 £59,450 £95,120
Double Storey Extension £59,450 £101,065 £166,460
Loft Conversion £29,725 £53,505 £89,175

Prices include labour and materials. VAT may apply. Based on East of England regional pricing.

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Full pricing

All Builder Prices in Brentwood

Every price adjusted for Brentwood using a 1.189x cost multiplier, rounded to the nearest £5.

Single Storey Extension

Low

£35,670

Average

£59,450

High

£95,120

8-12 weeks

Double Storey Extension

Low

£59,450

Average

£101,065

High

£166,460

12-20 weeks

Loft Conversion

Low

£29,725

Average

£53,505

High

£89,175

6-10 weeks

Garage Conversion

Low

£9,510

Average

£17,835

High

£29,725

2-4 weeks

Porch Build

Low

£2,975

Average

£5,350

High

£9,510

1-2 weeks

Garden Wall

Low

£950

Average

£1,785

High

£3,565

2-4 days

Knock Through Internal Wall

Low

£1,190

Average

£2,140

High

£4,160

2-4 days

Chimney Breast Removal

Low

£1,425

Average

£2,380

High

£4,160

2-4 days

Underpinning

Low

£5,945

Average

£14,270

High

£29,725

2-4 weeks

Damp Proof Course

Low

£595

Average

£1,425

High

£2,975

1-3 days

New Build Garage

Low

£11,890

Average

£21,400

High

£35,670

3-5 weeks

Outbuilding or Garden Room

Low

£14,270

Average

£29,725

High

£59,450

3-6 weeks

Structural Steelwork (RSJ Installation)

Low

£1,190

Average

£2,140

High

£3,565

1-2 days

Patio or Decking Build

Low

£1,785

Average

£4,160

High

£8,325

3-5 days

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Regional comparison

How Brentwood Compares

Average cost of single storey extension across regions.

Brentwood
+19% £59,450
National Average
baseline £50,000
London
+24% £62,150

Local insights

What Affects Builder Costs in Brentwood?

The East of England has a mix of housing styles, from Victorian and Edwardian semis to 1930s suburban developments and modern estates. In and around Brentwood, 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 East of England sits above the national average for trade costs, influenced by proximity to London and the generally higher cost of living. Labour rates in Brentwood are typically 19% 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 Brentwood 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 £59,450 to £166,460 for double storey extension in Brentwood. Coastal properties in the East of England may face additional considerations that affect pricing.

When getting quotes in Brentwood, 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 Brentwood

Explore costs for other services in the Brentwood area.

40 services — scroll to explore

Common questions

Frequently Asked Questions

Common questions about builder costs in Brentwood.

How much does a builder cost in Brentwood in 2026?
Single Storey Extension in Brentwood typically costs between £35,670 and £95,120, with the average being around £59,450. Prices vary depending on the scope of work, materials used, and the specific requirements of your property.
Are builder prices cheaper in Brentwood than London?
Brentwood prices are 19% above the national average, though still £2,700 cheaper than London for single storey extension.
How do I find a good builder in Brentwood?
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 Brentwood?
The main factors are the scope and complexity of what you need, the options and products chosen, and local market rates. Brentwood rates are 19% above the national average. Getting multiple quotes is the best way to ensure a fair price.
Do builder prices include materials in Brentwood?
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.