Wales
Rear extensions in North Wales
We design and build rear extensions across North Wales, from Wrexham and Buckley to Deeside, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
What are homes in North Wales like to extend?
Older terraces near the centre and post-war semis further out are typical of North Wales. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
Rear extension prices in North Wales
Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable. Per square metre including VAT, standard specification:
| Extension | Per m² |
|---|---|
| Single-storey rear extension | £1,770–£2,880 |
| Two-storey (per m² across both floors) | £1,670–£2,510 |
| Side return | £2,140–£3,530 |
| Wraparound | £2,050–£3,350 |
| Glass-led | £2,600–£4,460 |
Planning and building rules in North Wales
In Wales a single-storey rear extension can often be permitted development if it projects no more than 4 metres beyond the rear wall and is no more than 4 metres high. Wales has no prior approval route for deeper extensions, so anything bigger needs a householder planning application.
Welsh building regulations apply to every rear extension. The council or a registered approver checks the work against the Welsh Approved Documents and issues a completion certificate.
In Wales, as in England, the Party Wall etc. Act 1996 requires notice to neighbours before work to a shared wall or excavation near their foundations.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent.
Rear extensions we build in North Wales
- Glazed and glass-box rear extensions
- Rear extensions for terraced houses
- Rear extensions for semi-detached houses
- Rear extensions for detached houses
- Rear extensions for bungalows
- Flat-roof rear extensions
- Pitched and lean-to roof rear extensions
- Knocking through to a rear extension
- Roof lanterns and rooflights for rear extensions
- Permitted development rear extensions
- Rear extension plans and planning applications
- Building Regulations for rear extensions
- Single-storey rear extensions
- Two-storey rear extensions
- Kitchen-diner rear extensions
- Side return extensions
- Wraparound extensions
Towns and districts in North Wales
The main places we cover in North Wales include Wrexham, Buckley and Deeside, across postcode areas CH and LL.
| Town | Postcode districts | Nearest town we also cover |
|---|---|---|
| Wrexham | LL11, LL12, LL13 | Brymbo (3.4 miles) |
| Buckley | CH5, CH7 | Mold (2.4 miles) |
| Deeside | CH5 | Buckley (3.0 miles) |
| Colwyn Bay | LL28, LL29, LL31 | Llandudno (4.8 miles) |
| Flint | CH6 | Neston (4.3 miles) |
| Rhyl | LL18 | Prestatyn (3.7 miles) |
| Rhosllannerchrugog | LL11, LL14 | Wrexham (3.8 miles) |
| Prestatyn | LL19 | Rhyl (3.7 miles) |
| Bangor | LL58, LL59 | Llandudno (14.0 miles) |
| Brymbo | LL11, LL12 | Wrexham (3.4 miles) |
- Wrexham
- Buckley
- Deeside
- Colwyn Bay
- Flint
- Rhyl
- Rhosllannerchrugog
- Prestatyn
- Bangor
- Brymbo
- Llandudno
- Holyhead
- Abergele
- Mold
Areas near North Wales
FAQ
Questions people ask
How much does a rear extension cost in North Wales?
As a guide, £1,770–£2,880 per square metre including VAT for a standard single-storey extension at Wales rates.
Do I need planning permission in North Wales?
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.
Which towns in North Wales do you cover?
14 towns and districts, including Wrexham, Buckley and Deeside.
Do you handle building control?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.