Hayling Island, Hampshire
Single-storey rear extension in Hayling Island
Single-storey rear extension in Hayling Island: ground-floor space across the back of the house, usually for a kitchen, dining or family room. We measure the house, show you what the rules allow, price it in writing and build it.
Hayling Island is covered from our Hampshire round, including PO11. A single-storey rear extension in Hayling Island is mostly built from the garden side, so the house stays usable for most of the job.
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 single-storey rear extension cost in Hayling Island?
Guide prices for a single-storey rear extension in Hayling Island start from our South East England rate of £2,130–£3,470 per square metre, including VAT. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £25,500–£41,500 |
| 4 m wide × 5 m deep (20 m²) | £42,500–£69,500 |
| 4 m wide × 6 m deep (24 m²) | £51,000–£83,500 |
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 single-storey rear extension in Hayling Island?
The planning route for a single-storey rear extension in Hayling Island is set by England's householder rules and your council.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part 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. 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 Hayling Island like to extend?
Commuter semis and detached houses make up much of Hayling Island, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a single-storey rear extension in Hayling Island 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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Single-storey rear extensions near Hayling Island
Close by, we work in South Hayling, about 0.5 miles away, and Emsworth, about 4.6 miles away.
- Single-storey rear extension in South Hayling
- Single-storey rear extension in Emsworth
- Single-storey rear extension in Havant
- Single-storey rear extension in Southsea
- Single-storey rear extension in Portsmouth
Other work in Hayling Island:
FAQ
Single-storey rear extension questions in Hayling Island
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.
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 a single-storey rear extension be without planning?
In England, 3 metres on an attached house and 4 metres on a detached house under permitted development, or up to 6 and 8 metres with prior approval. Wales allows 4 metres; Scotland and Northern Ireland have their own limits.
Do you handle building control in Hayling Island?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Is the site visit in Hayling Island free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How long does a rear extension take to build in Hayling Island?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.