Wales regional pricing
How Much Does a Builder Cost in Torfaen?
Updated prices for . Torfaen prices are typically 3% below the national average.
Price summary
Torfaen Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £29,040 | £48,400 | £77,440 |
| Double Storey Extension | £48,400 | £82,280 | £135,520 |
| Loft Conversion | £24,200 | £43,560 | £72,600 |
Prices include labour and materials. VAT may apply. Based on Wales regional pricing.
Full pricing
All Builder Prices in Torfaen
Every price adjusted for Torfaen using a 0.968x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £29,040 | £48,400 | £77,440 | 8-12 weeks |
| Double Storey Extension | £48,400 | £82,280 | £135,520 | 12-20 weeks |
| Loft Conversion | £24,200 | £43,560 | £72,600 | 6-10 weeks |
| Garage Conversion | £7,745 | £14,520 | £24,200 | 2-4 weeks |
| Porch Build | £2,420 | £4,355 | £7,745 | 1-2 weeks |
| Garden Wall | £775 | £1,450 | £2,905 | 2-4 days |
| Knock Through Internal Wall | £970 | £1,740 | £3,390 | 2-4 days |
| Chimney Breast Removal | £1,160 | £1,935 | £3,390 | 2-4 days |
| Underpinning | £4,840 | £11,615 | £24,200 | 2-4 weeks |
| Damp Proof Course | £485 | £1,160 | £2,420 | 1-3 days |
| New Build Garage | £9,680 | £17,425 | £29,040 | 3-5 weeks |
| Outbuilding or Garden Room | £11,615 | £24,200 | £48,400 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £970 | £1,740 | £2,905 | 1-2 days |
| Patio or Decking Build | £1,450 | £3,390 | £6,775 | 3-5 days |
Single Storey Extension
Low
£29,040
Average
£48,400
High
£77,440
8-12 weeks
Double Storey Extension
Low
£48,400
Average
£82,280
High
£135,520
12-20 weeks
Loft Conversion
Low
£24,200
Average
£43,560
High
£72,600
6-10 weeks
Garage Conversion
Low
£7,745
Average
£14,520
High
£24,200
2-4 weeks
Porch Build
Low
£2,420
Average
£4,355
High
£7,745
1-2 weeks
Garden Wall
Low
£775
Average
£1,450
High
£2,905
2-4 days
Knock Through Internal Wall
Low
£970
Average
£1,740
High
£3,390
2-4 days
Chimney Breast Removal
Low
£1,160
Average
£1,935
High
£3,390
2-4 days
Underpinning
Low
£4,840
Average
£11,615
High
£24,200
2-4 weeks
Damp Proof Course
Low
£485
Average
£1,160
High
£2,420
1-3 days
New Build Garage
Low
£9,680
Average
£17,425
High
£29,040
3-5 weeks
Outbuilding or Garden Room
Low
£11,615
Average
£24,200
High
£48,400
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£970
Average
£1,740
High
£2,905
1-2 days
Patio or Decking Build
Low
£1,450
Average
£3,390
High
£6,775
3-5 days
Regional comparison
How Torfaen Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Torfaen?
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. Torfaen 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 Torfaen are typically 3% 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 Torfaen 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 Torfaen, expect to pay £48,400 to £135,520 for double storey extension.
When getting quotes in Torfaen, 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.
More services
Other Services in Torfaen
Explore costs for other services in the Torfaen 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 Torfaen.