Sleaford, Lincolnshire
Rear extension planning drawings in Sleaford
Rear extension planning drawings in Sleaford: measured survey, design options, planning drawings and the application, handled for you. We measure the house, show you what the rules allow, price it in writing and build it.
Sleaford is covered from our Lincolnshire round, including NG34. Planning applications in Sleaford go to the local planning authority covering Sleaford, 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 Sleaford?
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 Sleaford?
Whether your rear extension in Sleaford needs a planning application depends on its size, your house and any local restrictions.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Sleaford like to extend?
Sleaford has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a rear extension in Sleaford comes together
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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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.
Rear extension planning drawings near Sleaford
Neighbouring places we cover include Grantham (11.4 miles) and Boston (16.0 miles).
- Rear extension planning drawings in Grantham
- Rear extension planning drawings in Boston
- Rear extension planning drawings in Bourne
- Rear extension planning drawings in Lincoln
- Rear extension planning drawings in Newark on Trent
Other work in Sleaford:
FAQ
Rear extension planning drawings questions in Sleaford
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Is the site visit in Sleaford free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
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 Sleaford?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.