Colwyn Bay, North Wales
Rear extension planning drawings in Colwyn Bay
Measured survey, design options, planning drawings and the application, handled for you. If you live in Colwyn Bay and want to know what a 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. Planning applications in Colwyn Bay go to the local planning authority covering Colwyn Bay, and we check its local design guidance for rear extensions before drawing.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Colwyn Bay?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. Planning fees in Wales are set by the Welsh Government; we confirm the current householder fee when we prepare the application. Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a rear extension in Colwyn Bay?
Planning for a rear extension in Colwyn Bay follows the Welsh householder rules.
In Wales a rear extension of more than one storey can be permitted development if the ground floor projects no more than 4 metres and the upper floor no more than 3 metres, with at least 10.5 metres to the rear boundary. It is not permitted development in conservation areas, National Parks or National Landscapes, so many double-storey schemes need a householder application.
Welsh councils aim to decide householder applications within 8 weeks.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Colwyn Bay like to extend?
Colwyn Bay has Victorian terraces near the centre and semis further out. Welsh permitted development allows up to 4 metres at the rear for many houses.
How a rear extension in Colwyn Bay comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Colwyn Bay
From Colwyn Bay, the nearest places we also cover are Llandudno (4.8 miles) and Abergele (6.0 miles).
- Rear extension planning drawings in Llandudno
- Rear extension planning drawings in Abergele
- Rear extension planning drawings in Rhyl
- Rear extension planning drawings in Prestatyn
- Rear extension planning drawings in Bangor
Other work in Colwyn Bay:
FAQ
Rear extension planning drawings questions in Colwyn Bay
What do rear extension planning drawings cost in Colwyn Bay?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.
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 planning conditions affect the build?
Yes, for example matching materials or obscure glazing. We plan for them.
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.
How long does a rear extension take to build in Colwyn Bay?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.