Flint, North Wales
Two-storey rear extension in Flint
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Flint and want to know what a two-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Flint sits in North Wales, with postcode districts including CH6. In North Wales we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Flint?
A two-storey rear extension in Flint is priced at £1,670–£2,510 per square metre including VAT as a guide, before kitchen fit-out and fees. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £50,000–£75,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £80,500–£120,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a two-storey rear extension in Flint?
Planning for a two-storey rear extension in Flint follows the Welsh householder rules.
Welsh rules allow a two-storey rear extension without an application only where the ground floor is no deeper than 4 metres, the upper floor no deeper than 3 metres and at least 10.5 metres remains to the rear boundary. Most homeowners still apply for householder planning permission.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Flint like to extend?
Older terraces near the centre and post-war semis further out are typical of Flint. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a two-storey rear extension in Flint comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check or householder planning application, then Building Regulations drawings to the Welsh Approved Documents and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Flint
Close by, we work in Neston, about 4.3 miles away, and Deeside, about 4.9 miles away.
- Two-storey rear extension in Neston
- Two-storey rear extension in Deeside
- Two-storey rear extension in Mold
- Two-storey rear extension in Buckley
- Two-storey rear extension in Heswall
Other work in Flint:
FAQ
Two-storey rear extension questions in Flint
Do I need planning permission for a rear extension in Flint?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
Do I need a party wall agreement?
In Wales, usually yes if the extension is on or near a shared boundary or close to a neighbour's foundations. We serve the notices.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
What postcode areas do you cover around Flint?
Including CH6, and the surrounding North Wales area.