East of England regional pricing
How Much Does a Builder Cost in Welwyn Hatfield?
Updated prices for . Welwyn Hatfield prices are typically 16% above the national average.
Price summary
Welwyn Hatfield Price Summary
| Service | Low | Average | High |
|---|---|---|---|
| Single Storey Extension | £34,890 | £58,150 | £93,040 |
| Double Storey Extension | £58,150 | £98,855 | £162,820 |
| Loft Conversion | £29,075 | £52,335 | £87,225 |
Prices include labour and materials. VAT may apply. Based on East of England regional pricing.
Full pricing
All Builder Prices in Welwyn Hatfield
Every price adjusted for Welwyn Hatfield using a 1.163x cost multiplier, rounded to the nearest £5.
| Job | Low | Average | High | Duration |
|---|---|---|---|---|
| Single Storey Extension | £34,890 | £58,150 | £93,040 | 8-12 weeks |
| Double Storey Extension | £58,150 | £98,855 | £162,820 | 12-20 weeks |
| Loft Conversion | £29,075 | £52,335 | £87,225 | 6-10 weeks |
| Garage Conversion | £9,305 | £17,445 | £29,075 | 2-4 weeks |
| Porch Build | £2,910 | £5,235 | £9,305 | 1-2 weeks |
| Garden Wall | £930 | £1,745 | £3,490 | 2-4 days |
| Knock Through Internal Wall | £1,165 | £2,095 | £4,070 | 2-4 days |
| Chimney Breast Removal | £1,395 | £2,325 | £4,070 | 2-4 days |
| Underpinning | £5,815 | £13,955 | £29,075 | 2-4 weeks |
| Damp Proof Course | £580 | £1,395 | £2,910 | 1-3 days |
| New Build Garage | £11,630 | £20,935 | £34,890 | 3-5 weeks |
| Outbuilding or Garden Room | £13,955 | £29,075 | £58,150 | 3-6 weeks |
| Structural Steelwork (RSJ Installation) | £1,165 | £2,095 | £3,490 | 1-2 days |
| Patio or Decking Build | £1,745 | £4,070 | £8,140 | 3-5 days |
Single Storey Extension
Low
£34,890
Average
£58,150
High
£93,040
8-12 weeks
Double Storey Extension
Low
£58,150
Average
£98,855
High
£162,820
12-20 weeks
Loft Conversion
Low
£29,075
Average
£52,335
High
£87,225
6-10 weeks
Garage Conversion
Low
£9,305
Average
£17,445
High
£29,075
2-4 weeks
Porch Build
Low
£2,910
Average
£5,235
High
£9,305
1-2 weeks
Garden Wall
Low
£930
Average
£1,745
High
£3,490
2-4 days
Knock Through Internal Wall
Low
£1,165
Average
£2,095
High
£4,070
2-4 days
Chimney Breast Removal
Low
£1,395
Average
£2,325
High
£4,070
2-4 days
Underpinning
Low
£5,815
Average
£13,955
High
£29,075
2-4 weeks
Damp Proof Course
Low
£580
Average
£1,395
High
£2,910
1-3 days
New Build Garage
Low
£11,630
Average
£20,935
High
£34,890
3-5 weeks
Outbuilding or Garden Room
Low
£13,955
Average
£29,075
High
£58,150
3-6 weeks
Structural Steelwork (RSJ Installation)
Low
£1,165
Average
£2,095
High
£3,490
1-2 days
Patio or Decking Build
Low
£1,745
Average
£4,070
High
£8,140
3-5 days
Regional comparison
How Welwyn Hatfield Compares
Average cost of single storey extension across regions.
Local insights
What Affects Builder Costs in Welwyn Hatfield?
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 Welwyn Hatfield, 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 Welwyn Hatfield are typically 16% 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 Welwyn Hatfield 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 £58,150 to £162,820 for double storey extension in Welwyn Hatfield. Coastal properties in the East of England may face additional considerations that affect pricing.
When getting quotes in Welwyn Hatfield, 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.
More services
Other Services in Welwyn Hatfield
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UK-wide pricing
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Common questions
Frequently Asked Questions
Common questions about builder costs in Welwyn Hatfield.