Grimsby, Lincolnshire
Side return extension in Grimsby
Side return extension in Grimsby: infilling the narrow passage beside a Victorian or Edwardian back addition. We measure the house, show you what the rules allow, price it in writing and build it.
Grimsby sits in Lincolnshire, with postcode districts including DN31, DN32 and DN34. Side returns suit the Victorian and Edwardian terraces found across parts of Lincolnshire, where the kitchen sits in a narrow back addition.
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 side return extension cost in Grimsby?
A side return extension in Grimsby is priced at £2,230–£3,690 per square metre including VAT as a guide, before kitchen fit-out and fees. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £27,000–£44,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £39,000–£64,500 |
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 side return extension in Grimsby?
The planning route for a side return extension in Grimsby is set by England's householder rules and your council.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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 side return 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.
Side return extensions near Grimsby
Close by, we work in Cleethorpes, about 1.8 miles away, and Immingham, about 6.7 miles away.
- Side return extension in Cleethorpes
- Side return extension in Immingham
- Side return extension in Hedon
- Side return extension in Louth
- Side return extension in Kingston upon Hull
Other work in Grimsby:
FAQ
Side return 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.
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.
Glass roof or solid roof with rooflights?
A glass roof gives the most light; a solid roof with long rooflights is warmer and quieter in rain. Both work.
How much does a side return extension cost in Grimsby?
As a guide, £2,230–£3,690 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £27,000–£44,000 at that rate. Your written price follows the survey.
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 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.