Extension Builder Cost in Hull

Building an extension is a significant investment for any Hull homeowner. Costs vary considerably depending on the size, complexity, materials, and whether planning permission is required. Extension builders in Hull typically charge between £8,000 and £25,000+ depending on the scope of work. BizHub365 connects you with experienced, local extension builders who can provide accurate quotes tailored to your project and budget.

Extension Builder Prices in Hull

Service	Typical Cost	Unit
Single-storey extension (10–15 sq m)	£8000 – £15000	per job
Single-storey extension (15–25 sq m)	£15000 – £25000	per job
Two-storey extension (15–25 sq m)	£22000 – £40000	per job
Rear extension with bi-fold doors	£12000 – £22000	per job
Foundation and concrete work	£80 – £150	per sq m
Brick/blockwork construction	£120 – £200	per sq m
Roof construction (pitched or flat)	£100 – £180	per sq m
Plastering and finishing	£40 – £80	per sq m

Prices are indicative averages for Hull. Actual quotes will vary based on job specifics.

What Affects the Cost?

Extension costs in Hull are influenced by several key factors. The size and design of your extension directly impact labour and material costs. Planning permission and Building Regulations approval add time and compliance requirements. The condition of your existing foundations and access also matter—awkward sites cost more. Material choices, insulation standards, and finishing quality all affect the final price. Hull's competitive local market and relatively straightforward ground conditions help keep costs below national averages.

Money-Saving Tips

Get quotes from at least three local extension builders to compare prices and timescales. Plan your extension to minimise complex roof angles or structural work. Arrange materials yourself to potentially save 10–15%, but agree this with your builder first. Starting work in winter can sometimes secure better rates.

Frequently Asked Questions

Do I need planning permission for an extension in Hull?

Many single-storey extensions and rear extensions are permitted under Planning Permitted Development Rights and don't need formal permission. However, two-storey extensions, extensions over 15% of your plot, and listed properties usually do. Building Regulations approval is always required. Your extension builder should advise on this during the quote stage.

How long does an extension typically take to build?

A single-storey extension of 15–25 sq m usually takes 12–18 weeks from foundation to completion, depending on weather and inspections. Two-storey extensions take 20–28 weeks. This includes time for Building Control inspections and any unforeseen issues.

What's included in an extension builder's quote?

A full quote should cover structural works (foundation, walls, roof), utilities (plumbing, electrics, drainage), insulation, plastering, and finishing. Check whether it includes skip hire, scaffolding, and contingency for issues. Don't assume VAT is included—always ask.

Can I get a fixed price, or is it an estimate?

Most builders provide fixed-price quotes once you've agreed designs and they've surveyed your property. However, many include a contingency (10–15%) for unforeseen ground conditions or structural issues. Always have this in writing.

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