Grimsby, Lincolnshire
Bungalow rear extension in Grimsby
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Grimsby and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Grimsby (DN31, DN32 and DN34) as part of our Lincolnshire work. For Grimsby bungalows we design the roof first, because the low eaves decide the height of the new room.
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 Grimsby?
In Grimsby, our guide for a bungalow rear extension is £1,790–£2,910 per square metre including VAT for a standard specification. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,500–£35,000 |
| 4 m wide × 6 m deep (24 m²) | £43,000–£70,000 |
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 Grimsby?
Whether your bungalow rear extension in Grimsby needs a planning application depends on its size, your house and any local restrictions.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always 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 Grimsby like to extend?
Grimsby has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a bungalow rear extension in Grimsby 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.
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 Grimsby
Neighbouring places we cover include Cleethorpes (1.8 miles) and Immingham (6.7 miles).
- Bungalow rear extension in Cleethorpes
- Bungalow rear extension in Immingham
- Bungalow rear extension in Hedon
- Bungalow rear extension in Louth
- Bungalow rear extension in Kingston upon Hull
Other work in Grimsby:
FAQ
Bungalow rear extension questions in Grimsby
What postcode areas do you cover around Grimsby?
Including DN31, DN32 and DN34, and the surrounding Lincolnshire area.
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.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
How much does a bungalow rear extension cost in Grimsby?
As a guide, £1,790–£2,910 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £21,500–£35,000 at that rate. Your written price follows the survey.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Do you handle building control in Grimsby?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.