Grimsby, Lincolnshire
Two-storey rear extension in Grimsby
For homes in Grimsby, a two-storey rear extension is often the simplest way to gain space without moving. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We take it from survey to completion certificate.
Grimsby is covered from our Lincolnshire round, including DN31, DN32 and DN34. In Grimsby, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
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 two-storey rear extension cost in Grimsby?
In Grimsby, our guide for a two-storey rear extension is £1,750–£2,620 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 × 5 m footprint, two floors (30 m²) | £52,500–£78,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £84,000–£125,500 |
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 two-storey rear extension in Grimsby?
Here is how the rules in England apply to a two-storey rear extension in Grimsby.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 two-storey 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Grimsby
Close by, we work in Cleethorpes, about 1.8 miles away, and Immingham, about 6.7 miles away.
- Two-storey rear extension in Cleethorpes
- Two-storey rear extension in Immingham
- Two-storey rear extension in Hedon
- Two-storey rear extension in Louth
- Two-storey rear extension in Kingston upon Hull
Other work in Grimsby:
FAQ
Two-storey rear extension questions in Grimsby
How much does a two-storey rear extension cost in Grimsby?
As a guide, £1,750–£2,620 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £52,500–£78,500 at that rate. Your written price follows the survey.
Is the site visit in Grimsby free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I add an en-suite upstairs?
Yes. We plan the soil pipe route early so the bathroom sits where drainage works without boxing through the room below.
What postcode areas do you cover around Grimsby?
Including DN31, DN32 and DN34, and the surrounding Lincolnshire area.
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.
Do I need planning permission for a rear extension in Grimsby?
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.