Extension Builder Cost in Selby

Building an extension is one of the most significant investments a Selby homeowner can make. Costs vary widely depending on the type and scale of work, materials selected, site conditions, and local labour rates. A single-storey rear extension might cost £15,000–£25,000, whilst a two-storey addition could reach £50,000–£100,000 or more. BizHub365 connects you with experienced, vetted extension builders in Selby who can provide accurate quotations for your specific project.

Extension Builder Prices in Selby

Service	Typical Cost	Unit
Single-storey rear extension (20 sqm)	£15000 – £28000	per project
Two-storey extension (30 sqm)	£45000 – £85000	per project
Side extension (15 sqm, single storey)	£12000 – £22000	per project
Brick and block work (including labour)	£120 – £180	per sqm
Plastering and finishing	£25 – £45	per sqm
Roof installation (slate or tile)	£80 – £150	per sqm
Planning permission and building regulation approval	£800 – £2000	per project
Structural engineer design and reports	£500 – £1500	per project

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

What Affects the Cost?

Extension builder costs in Selby are influenced by several key factors. Project scope and complexity—single-storey vs multi-storey, simple rectangular vs intricate designs—significantly impact pricing. Material choices (standard brick, premium finishes, energy-efficient glazing) drive up costs. Ground conditions, existing foundation strength, and proximity to services affect groundworks expenses. Labour availability in the Selby area and skilled tradesperson rates also play a role. Planning and building regulation requirements, including structural engineering reports, add time and expense. Project timescale and weather conditions during construction further influence final costs.

Money-Saving Tips

Obtain multiple quotes from reputable Selby extension builders to compare costs and specifications. Phase your project—build the structure first and complete internal finishes later to spread expenses. Choose standard materials and finishes over premium upgrades; simple rectangular designs are cheaper than complex shapes. Ensure your brief is detailed upfront to avoid expensive change orders during construction.

Frequently Asked Questions

Do I need planning permission for an extension in Selby?

Most single-storey rear extensions qualify for permitted development rights and don't need planning permission, provided they meet size and boundary distance rules. However, two-storey extensions, side extensions, and extensions close to property lines typically require formal planning approval from Selby Borough Council. Your builder should advise on your specific situation and obtain the necessary approvals.

How long does a typical extension project take in Selby?

A single-storey extension usually takes 10–16 weeks from foundation to completion. Two-storey extensions may take 20–32 weeks depending on complexity, weather, and supply chain. This includes design, approvals, construction, and final finishing. Delays can occur due to unforeseen ground conditions or weather.

What does the £15,000–£28,000 single-storey extension price include?

These costs typically cover foundations, brick and block walls, roof installation, basic windows and doors, internal plastering, concrete floors, and basic finishes. Exclusions usually include fitted kitchens, flooring, decoration, and utility connections (electrics, plumbing), which are often quoted separately or budgeted for later.

Are building regulations inspections required for extensions in Selby?

Yes, all extensions in England require Building Regulations approval regardless of whether planning permission is needed. Selby Borough Council will inspect foundations, structural work, thermal insulation, electrics, and drainage. Your extension builder must comply fully and arrange inspections at key stages. Failure to obtain approval can affect future property sales.

Get this pricing guide emailed to you

We'll also send you money-saving tips for hiring a extension builder in Selby.

Expand Your Selby Home with Local Experts

Join BizHub365 and connect with trusted, vetted extension builders in Selby. Manage quotes, timelines, and payments in one secure platform. Grow your reputation and win more projects—register today.

Are you a Extension Builder?

Get listed in Selby

Appear on this page and reach customers searching for extension builder costs in Selby.

Claim Your Listing

Find Extension Builders in Selby

Browse extension builder businesses near Selby, compare reviews, and get quotes.

Browse Local Extension Builders

How Much Does an Extension Builder Cost in Selby?