Grimsby, Lincolnshire
Kitchen-diner rear extension in Grimsby
We plan and build kitchen-diner rear extensions for homeowners in Grimsby. An open-plan kitchen, dining and family room that opens straight onto the garden. Start with a free site visit, then a written price once the design is agreed.
Grimsby and its postcode districts DN31, DN32 and DN34 are part of our Lincolnshire coverage. For Grimsby kitchens we plan the extraction route and the island drainage before the slab is poured, so nothing has to be chased in later.
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 kitchen-diner rear extension cost in Grimsby?
Guide prices for a kitchen-diner rear extension in Grimsby start from our East Midlands rate of £1,840–£3,010 per square metre, including VAT. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £22,000–£36,000 |
| 4 m wide × 5 m deep (20 m²) | £37,000–£60,000 |
| 4 m wide × 6 m deep (24 m²) | £44,000–£72,000 |
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 kitchen-diner rear extension in Grimsby?
Planning for a kitchen-diner rear extension in Grimsby follows the English householder rules.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
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 Grimsby like to extend?
Grimsby has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a kitchen-diner rear extension in Grimsby 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Kitchen-diner rear extensions near Grimsby
Neighbouring places we cover include Cleethorpes (1.8 miles) and Immingham (6.7 miles).
- Kitchen-diner rear extension in Cleethorpes
- Kitchen-diner rear extension in Immingham
- Kitchen-diner rear extension in Hedon
- Kitchen-diner rear extension in Louth
- Kitchen-diner rear extension in Kingston upon Hull
Other work in Grimsby:
FAQ
Kitchen-diner rear extension questions in Grimsby
How long does a rear extension take to build in Grimsby?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Is the site visit in Grimsby free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Where does the cooker extraction go?
Through the new wall or roof, ducted to outside. Recirculating hoods are possible but less effective.
Can you match the brick or stone on my Grimsby house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Grimsby?
Including DN31, DN32 and DN34, and the surrounding Lincolnshire area.
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.