Wales regional pricing

How Much Does a Builder Cost in Blaenau Gwent?

Updated prices for . Blaenau Gwent prices are typically 6% below the national average.

14 services priced
Wales region
Updated

Price summary

Blaenau Gwent Price Summary

Service Low Average High
Single Storey Extension £28,170 £46,950 £75,120
Double Storey Extension £46,950 £79,815 £131,460
Loft Conversion £23,475 £42,255 £70,425

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

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Full pricing

All Builder Prices in Blaenau Gwent

Every price adjusted for Blaenau Gwent using a 0.939x cost multiplier, rounded to the nearest £5.

Single Storey Extension

Low

£28,170

Average

£46,950

High

£75,120

8-12 weeks

Double Storey Extension

Low

£46,950

Average

£79,815

High

£131,460

12-20 weeks

Loft Conversion

Low

£23,475

Average

£42,255

High

£70,425

6-10 weeks

Garage Conversion

Low

£7,510

Average

£14,085

High

£23,475

2-4 weeks

Porch Build

Low

£2,350

Average

£4,225

High

£7,510

1-2 weeks

Garden Wall

Low

£750

Average

£1,410

High

£2,815

2-4 days

Knock Through Internal Wall

Low

£940

Average

£1,690

High

£3,285

2-4 days

Chimney Breast Removal

Low

£1,125

Average

£1,880

High

£3,285

2-4 days

Underpinning

Low

£4,695

Average

£11,270

High

£23,475

2-4 weeks

Damp Proof Course

Low

£470

Average

£1,125

High

£2,350

1-3 days

New Build Garage

Low

£9,390

Average

£16,900

High

£28,170

3-5 weeks

Outbuilding or Garden Room

Low

£11,270

Average

£23,475

High

£46,950

3-6 weeks

Structural Steelwork (RSJ Installation)

Low

£940

Average

£1,690

High

£2,815

1-2 days

Patio or Decking Build

Low

£1,410

Average

£3,285

High

£6,575

3-5 days

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Regional comparison

How Blaenau Gwent Compares

Average cost of single storey extension across regions.

Blaenau Gwent
-6% £46,950
National Average
baseline £50,000
London
+24% £62,150

Local insights

What Affects Builder Costs in Blaenau Gwent?

Wales has a distinctive mix of housing, from Victorian and Edwardian terraces in the south to stone-built cottages and rural properties across the rest of the country. Blaenau Gwent and the wider area around Swansea and the Valleys include many older properties that present challenges for builder work. Stone walls, exposed locations, and older infrastructure all tend to push costs toward the higher end.

Wales sits below the national average for trade costs. Labour rates in Blaenau Gwent are typically 6% below the UK average. While this makes builder work more affordable, there can be fewer qualified professionals in rural areas compared to English cities, which can mean longer waiting times. In more populated areas, competition keeps prices reasonable. Always get at least three quotes.

Properties in Blaenau Gwent can present specific challenges that affect builder costs. Stone-built and older Welsh terraces often have thick walls that make work more difficult and expensive. Properties in exposed or rural locations may face harsher weather conditions that influence timing and approach. For larger jobs in Blaenau Gwent, expect to pay £46,950 to £131,460 for double storey extension.

When getting quotes in Blaenau Gwent, 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 existing conditions, 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 Blaenau Gwent

Explore costs for other services in the Blaenau Gwent area.

40 services — scroll to explore

Common questions

Frequently Asked Questions

Common questions about builder costs in Blaenau Gwent.

How much does a builder cost in Blaenau Gwent in 2026?
Single Storey Extension in Blaenau Gwent typically costs between £28,170 and £75,120, with the average being around £46,950. Prices vary depending on the scope of work, materials used, and the specific requirements of your property.
Are builder prices cheaper in Blaenau Gwent than London?
Yes. Blaenau Gwent builder costs are typically 6% below the national average, while London prices run around 24% above it. For single storey extension, you could save over £15,200 compared to the same job in London.
How do I find a good builder in Blaenau Gwent?
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 Blaenau Gwent?
The main factors are the scope and complexity of what you need, the options and products chosen, and local market rates. Blaenau Gwent rates are 6% below the national average. Getting multiple quotes is the best way to ensure a fair price.
Do builder prices include materials in Blaenau Gwent?
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.