Colwyn Bay, North Wales
Bungalow rear extension in Colwyn Bay
Single-storey rear extensions that keep everything on one level. If you live in Colwyn Bay and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Colwyn Bay is covered from our North Wales round, including LL28, LL29 and LL31. For bungalows in North Wales, a rear extension is the usual way to add space without adding stairs.
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 bungalow rear extension cost in Colwyn Bay?
For Colwyn Bay we work from the Wales rate: £1,720–£2,790 per square metre of new floor, including VAT, standard specification. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £20,500–£33,500 |
| 4 m wide × 6 m deep (24 m²) | £41,500–£67,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a bungalow rear extension in Colwyn Bay?
The planning route for a bungalow rear extension in Colwyn Bay is set by Wales's householder rules and your council.
The Welsh Government's householder rules let many homes add a single-storey rear extension up to 4 metres deep and 4 metres high without a planning application. Deeper projects go through a householder application, because Wales has no prior approval route.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Colwyn Bay like to extend?
Older terraces near the centre and post-war semis further out are typical of Colwyn Bay. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a bungalow rear extension in Colwyn Bay comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Bungalow rear extensions near Colwyn Bay
Close by, we work in Llandudno, about 4.8 miles away, and Abergele, about 6.0 miles away.
- Bungalow rear extension in Llandudno
- Bungalow rear extension in Abergele
- Bungalow rear extension in Rhyl
- Bungalow rear extension in Prestatyn
- Bungalow rear extension in Bangor
Other work in Colwyn Bay:
FAQ
Bungalow rear extension questions in Colwyn Bay
Can you match the brick or stone on my Colwyn Bay house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Colwyn Bay?
Including LL28, LL29 and LL31, and the surrounding North Wales area.
Will the roof look odd?
Not if the pitch and tiles match. Where the eaves are low, a flat-roofed section with a lantern is an alternative.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Is the site visit in Colwyn Bay free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.