Plymouth, Devon
Rear extension planning drawings in Plymouth
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Plymouth and the surrounding area, with one contract from the first survey to building control sign-off.
Plymouth and its postcode districts PL2, PL3, PL4 and PL5 are part of our Devon coverage. For Plymouth 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 Plymouth?
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. A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee. These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a rear extension in Plymouth?
Planning for a rear extension in Plymouth follows the English householder rules.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always 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 Plymouth like to extend?
Stone-built and rendered houses are common around Plymouth, so matching the walling is a design decision in its own right: natural stone, reconstituted stone or a render finish across old and new.
How a rear extension in Plymouth 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Paperwork handled
Planning, prior approval 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 Plymouth
From Plymouth, the nearest places we also cover are Plymstock (2.4 miles) and Saltash (4.5 miles).
- Rear extension planning drawings in Plymstock
- Rear extension planning drawings in Saltash
- Rear extension planning drawings in Ivybridge
- Rear extension planning drawings in Tavistock
- Rear extension planning drawings in Paignton
Other work in Plymouth:
FAQ
Rear extension planning drawings questions in Plymouth
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.
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.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
What do rear extension planning drawings cost in Plymouth?
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.
How long does a rear extension take to build in Plymouth?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do I need planning permission for a rear extension in Plymouth?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.