Runcorn house extensions
Blades Building — a Warrington-based Ltd company covering Runcorn and the wider Cheshire (Halton) area. Rated 10/10 on Checkatrade across 36 reviews.
If you're in Runcorn and thinking about house extensions, you're roughly 8 miles south-west of Warrington of Warrington town centre, which puts you inside the practical service radius we cover from Padgate. Andy comes out personally to look at the property — usually within a week of the first call — and gives a straight, honest read on what's involved before you commit to drawings or a quote.
How a Runcorn house extension job runs
Site visit
Andy comes to look at the house and understand what you want to change.
Feasibility
We flag structural, planning and drainage issues before you commission drawings.
Design & approvals
We coordinate with your architect and structural engineer through Building Control.
Build
Foundations, structure, weather-tight shell, first fix, plaster, second fix and hand-over.
Things we flag on Runcorn projects
- Permitted Development limits vs a full planning application
- Party Wall notices where the build sits on or near a boundary
- SAP/Building Regulations Part L thermal targets
- coordinating steel design with the existing floor structure
- matching brick, mortar colour and course heights to the original house
What house extensions usually looks like around Runcorn
single-storey rear kitchen-diner extensions
two-storey side extensions adding a bedroom and larger kitchen
wrap-around L-shaped extensions on semi-detached properties
over-garage bedroom extensions on 1960s/70s stock
orangery-style rear additions with a lantern roof
Also working near Runcorn
Runcorn sits close to Halton, Weston Point, Sandymoor — we cover those and the wider Cheshire (Halton) area for house extensions.
What we typically specify for Runcorn jobs
Runcorn house extensions — questions we're asked
Can you match the brickwork on older Runcorn homes?
Yes. On period stock around Silver Jubilee Bridge we source reclaimed facings and colour-match mortar so the new wall reads as part of the original elevation, not an obvious add-on.
Do I need a Party Wall agreement in Runcorn?
If the extension sits on or within 3m of a shared boundary — common on the semis and terraces around Halton and Weston Point — a Party Wall notice is required. We can point you at surveyors we've worked with.
Will access be a problem on a tight Runcorn plot?
Plenty of Runcorn homes have side-return access under 900mm. We plan skip position, muck-away and materials drops around M56 J12 and the Mersey Gateway and neighbours so the street stays workable.
Do I need planning permission for an extension in Runcorn?
Many single-storey rear extensions in Runcorn (WA7) fall under Permitted Development, but Halton Borough Council treats conservation areas, Article 4 zones and larger two-storey work differently. We'll tell you honestly on the first visit which route your project needs.
Do you handle the structural steelwork yourself?
Yes — we install RSJs and pad-stones in-house so the shell doesn't wait on a separate steel contractor showing up.
Ready to extend? Start with a conversation.
Most Runcorn customers start with a 20-minute phone call so we can flag anything obvious before scheduling a visit.