London regional pricing

How Much Does a Builder Cost in Kingston upon Thames?

Updated prices for . Kingston upon Thames prices are typically 31% above the national average.

14 services priced
London region
Updated

Price summary

Kingston upon Thames Price Summary

Service Low Average High
Single Storey Extension £39,390 £65,650 £105,040
Double Storey Extension £65,650 £111,605 £183,820
Loft Conversion £32,825 £59,085 £98,475

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

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Full pricing

All Builder Prices in Kingston upon Thames

Every price adjusted for Kingston upon Thames using a 1.313x cost multiplier, rounded to the nearest £5.

Single Storey Extension

Low

£39,390

Average

£65,650

High

£105,040

8-12 weeks

Double Storey Extension

Low

£65,650

Average

£111,605

High

£183,820

12-20 weeks

Loft Conversion

Low

£32,825

Average

£59,085

High

£98,475

6-10 weeks

Garage Conversion

Low

£10,505

Average

£19,695

High

£32,825

2-4 weeks

Porch Build

Low

£3,285

Average

£5,910

High

£10,505

1-2 weeks

Garden Wall

Low

£1,050

Average

£1,970

High

£3,940

2-4 days

Knock Through Internal Wall

Low

£1,315

Average

£2,365

High

£4,595

2-4 days

Chimney Breast Removal

Low

£1,575

Average

£2,625

High

£4,595

2-4 days

Underpinning

Low

£6,565

Average

£15,755

High

£32,825

2-4 weeks

Damp Proof Course

Low

£655

Average

£1,575

High

£3,285

1-3 days

New Build Garage

Low

£13,130

Average

£23,635

High

£39,390

3-5 weeks

Outbuilding or Garden Room

Low

£15,755

Average

£32,825

High

£65,650

3-6 weeks

Structural Steelwork (RSJ Installation)

Low

£1,315

Average

£2,365

High

£3,940

1-2 days

Patio or Decking Build

Low

£1,970

Average

£4,595

High

£9,190

3-5 days

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Regional comparison

How Kingston upon Thames Compares

Average cost of single storey extension across regions.

Kingston upon Thames
+31% £65,650
National Average
baseline £50,000
London
+24% £62,150

Local insights

What Affects Builder Costs in Kingston upon Thames?

Kingston upon Thames's housing stock ranges from Georgian and Victorian terraces to post-war estates and modern new-builds. Properties across areas like Islington, Hackney and Brixton vary enormously in age, layout and condition, all of which directly affect builder costs. Older properties tend to need more preparation work and present access challenges that push prices toward the higher end of the ranges shown above.

London is the most expensive part of the UK for trade work, with labour rates running around 24% above the national average. This reflects the high cost of living, congestion charges, and expensive parking that tradespeople factor into their quotes. Despite the higher prices, there is no shortage of qualified builder professionals across the capital. Prices still vary by 30-50% between tradespeople for the same job, making multiple quotes essential.

Several factors affect what you will pay for builder work in Kingston upon Thames. The scope and complexity of the job is the biggest driver — straightforward work in accessible locations will be at the lower end, while anything involving older properties, difficult access, or structural complications will cost more. Material choices also make a significant difference; opting for premium brands or higher-spec products can add 20-40% to the total. For larger jobs, a builder in Kingston upon Thames might quote £65,650 to £183,820 for double storey extension.

When getting quotes in Kingston upon Thames, aim for at least three from different qualified professionals. Ask each one to visit and assess the work in person rather than quoting over the phone. A good builder will check the existing setup, identify any potential complications, and give you a detailed breakdown of costs. Be wary of quotes that seem significantly cheaper than others — they may be cutting corners on materials or not including everything in the price. Always check qualifications, insurance and recent reviews before hiring.

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More services

Other Services in Kingston upon Thames

Explore costs for other services in the Kingston upon Thames area.

40 services — scroll to explore

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Common questions

Frequently Asked Questions

Common questions about builder costs in Kingston upon Thames.

How much does a builder cost in Kingston upon Thames in 2026?
Single Storey Extension in Kingston upon Thames typically costs between £39,390 and £105,040, with the average being around £65,650. Prices vary depending on the scope of work, materials used, and the specific requirements of your property.
Are builder prices cheaper in Kingston upon Thames than London?
Kingston upon Thames prices are 31% above the national average, though still comparable to London for single storey extension.
How do I find a good builder in Kingston upon Thames?
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 Kingston upon Thames?
The main factors are the scope and complexity of what you need, the options and products chosen, and local market rates. Kingston upon Thames rates are 31% above the national average. Getting multiple quotes is the best way to ensure a fair price.
Do builder prices include materials in Kingston upon Thames?
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.