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Rhondda, South Wales Valleys

Rear extension planning drawings in Rhondda

Measured survey, design options, planning drawings and the application, handled for you. If you live in Rhondda 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.

We cover Rhondda (CF40, CF41 and CF43) as part of our South Wales Valleys work. For Rhondda homes we start with a measured survey, then draw options before anything is submitted.

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 Rhondda?

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. 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 rear extension in Rhondda?

Planning for a rear extension in Rhondda 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.

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. 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 Rhondda like to extend?

Rhondda is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.

How a rear extension in Rhondda comes together

  1. 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.

  2. Options and costs

    We draw layout options and price each one, so the budget shapes the design rather than surprising you later.

  3. 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.

  4. 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.

Rear extension planning drawings near Rhondda

Close by, we work in Tonypandy, about 2.6 miles away, and Mountain Ash, about 3.4 miles away.

Other work in Rhondda:

All rear extensions in Rhondda

FAQ

Rear extension planning drawings questions in Rhondda

How long does a rear extension take to build in Rhondda?

Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.

What do rear extension planning drawings cost in Rhondda?

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.

Can planning conditions affect the build?

Yes, for example matching materials or obscure glazing. We plan for them.

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.

Do you handle building control in Rhondda?

Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.

What postcode areas do you cover around Rhondda?

Including CF40, CF41 and CF43, and the surrounding South Wales Valleys area.

Next step

See what your rear extension would cost

Get a guide price online in a couple of minutes, or book a free site visit and we'll measure up and talk you through the planning route.

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