House Extension
in Doncaster
Compare quotes from vetted Doncaster extension builders for single-storey, double-storey and rear extensions. Transparent pricing from £15,000. Free, no-obligation quotes — results in 24 hours.
- Local house extension specialists in Doncaster
- Up to 3 free quotes — compare and choose with no pressure
- Transparent pricing, no hidden costs or surprise charges
- Compare up to 3 quotes — you choose who to hire
How Much Do House Extension Cost in Doncaster?
Real prices from completed projects in Doncaster and the surrounding area. Costs vary by size, specification and access — use these as a starting guide, then get 3 free quotes for your specific project.
The most popular choice for UK terraces and semis. Adds a kitchen-diner or extra living space at ground level. Typically 3–5m deep, completed in 10–14 weeks.
Get quotes for this →Maximum space gain in a single build — adds a ground-floor room and a bedroom above. Strong ROI in most UK property markets. Requires full planning permission.
Get quotes for this →Ideal for terraced homes with a narrow side alley. Transforms a cramped kitchen into a full-width open-plan space. Often combined with a rear extension.
Get quotes for this →Costs depend on size, spec and access. The best way to know your exact price is to compare 3 quotes from local specialists.
Get free quotes →Doncaster pricing note: Yorkshire and Humber offers some of the most competitive building prices in England, typically 5–10% below the national average. Good contractor availability across Leeds, Sheffield, Hull and surrounding areas. Prices shown are indicative ranges for Doncaster and Yorkshire. Always get at least 3 written quotes before committing to any builder.
House Extension Specialists Who Know Doncaster
Tell us about your house extension project once and up to three local specialists who cover Doncaster get in touch with quotes — free, with no obligation, and you choose who to hire.
Trades covering Doncaster normally work across the surrounding area as well — including Shipley, Pickering and Bradford — so your shortlist is drawn from the wider Yorkshire pool rather than a single postcode. Doncaster falls in the DN postcode area, covering roughly 131,700 households.
It helps to know the regional picture before you budget: Yorkshire and Humber offers some of the most competitive building prices in England, typically 5–10% below the national average. Good contractor availability across Leeds, Sheffield, Hull and surrounding areas. Three like-for-like quotes will show where your Doncaster project lands.
Local facts: Doncaster
- Local planning authority: Doncaster Council
- Region: Yorkshire and The Humber
- Town-centre postcode district: DN1
- Average house price (Doncaster local authority, June 2026): £170,784 (+4.4% year on year) — detached £260,150, semi-detached £167,975, terraced £133,224, flats £89,901
Planning-authority, region and postcode data: ONS Postcode Directory (Open Government Licence). House prices: HM Land Registry UK House Price Index for the local authority (OGL). Member coverage is each member's own registered base and travel radius.
How It Works
Every Builder We Recommend Is:
House Extension in Doncaster — FAQs
Plan Your house extension Project in Doncaster
Whether you're researching costs, checking planning rules, or comparing approaches before you commit, our editorial team has produced these guides to help Doncaster homeowners make informed decisions about their house extension project.
House Extension Cost Guide
Detailed UK price ranges, regional adjustments and worked examples for house extension projects.
Read House Extension Cost Guide →All House Extension Specialists
Browse our nationwide network of local house extension contractors covering all 519 UK towns.
Browse House Extension Specialists →All Cost Guides
Compare prices across extensions, lofts, kitchens, bathrooms, roofing, driveways and solar projects.
View All Cost Guides →Planning your house extension project? Read these guides:
House Extension Near Doncaster
We also connect homeowners with local house extension specialists in towns surrounding Doncaster.
Planning Your House Extension in Doncaster
Before you compare quotes, it's worth understanding the full UK price picture for house extension and how Doncaster sits within it. The guides below cover average costs, what affects your quote, and how to choose a builder you can trust.
UK House Extension Cost Guide
Full price ranges, worked examples and the factors that move your quote — drawn from real project data across 519 UK towns.
Read the house extension cost guide →House Extension Across the UK
Browse house extension services nationwide, see what's typical in your region, and request quotes from any UK location.
Visit the UK house extension hub →Planning Permission for House Extension in Doncaster
Find out whether your house extension needs planning permission in Doncaster, what Permitted Development limits apply, and how rules differ in conservation areas, Article 4 zones, and listed-building settings.
Read the house extension planning rules →More homeowner resources: all UK building guides, cost guides, planning permission, comparisons, how-to guides and industry insights.