Covering Merseyside
Our single-storey extensions service in Merseyside covers Liverpool, Birkenhead, St Helens and Southport and more.
Homes in the North West
The North West has long rows of Victorian terraced houses in its towns and cities, alongside inter-war semis and post-war estates, so rear extensions, dormer lofts and kitchen extensions are common projects.
What is included in a single-storey extension in Merseyside?
A single-storey extension adds one level of new floor space to the back or side of a house, usually to open up a kitchen, dining or family room. It is the most common way to gain space without moving, and many can be built without a planning application.
- Measured survey and design drawings
- Planning or lawful development certificate where needed
- First-fix and second-fix electrics, plastering and making good
How much does a single-storey extension cost in Merseyside?
Use these ranges to budget for single-storey extensions; the survey turns them into a fixed price for the agreed specification.
| Single-storey extensions | Guide price incl. VAT |
|---|---|
| Standard specification | £2,600 to £3,000 per m² |
| Good specification | £3,000 to £3,500 per m² |
| High specification | £3,500 to £4,000 per m² |
What approvals does a single-storey extension need in England?
English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.
In England a single-storey rear extension can often go ahead under permitted development: up to 3 m deep on an attached house or 4 m on a detached one, no higher than 4 m, with eaves no higher than 3 m within 2 m of a boundary.
What can affect a single-storey extension?
- Large glazed areas need to meet energy rules, which can shape the size of doors and rooflights.
- Kitchens and doors have long lead times, so we order them early.
How does the project run?
- Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
- We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
- Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
Your questions answered
How much does a single-storey extension cost?
Most single-storey extensions cost about £2,600 to £4,000 per square metre including VAT, depending on specification, glazing and ground conditions. We give a fixed price in writing for the agreed specification after the survey.
How long does a single-storey extension take to build?
The build itself usually takes 10 to 16 weeks once work starts on site. Design, approvals and ordering usually add 6 to 12 weeks before that.
How do I get a price for single-storey extensions in Merseyside?
Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.
Single-storey extensions in nearby towns
- Single-storey extensions in Liverpool
- Single-storey extensions in Birkenhead
- Single-storey extensions in St Helens
- Single-storey extensions in Southport
- Single-storey extensions in Wallasey
- Single-storey extensions in Bootle
- Single-storey extensions in Bebington
- Single-storey extensions in Huyton
- Single-storey extensions in Kirkby
- Single-storey extensions in Prescot
- Single-storey extensions in Heswall
- Single-storey extensions in Maghull
- Single-storey extensions in Newton-le-Willows
- Single-storey extensions in Formby
- Single-storey extensions in Litherland
- Single-storey extensions in Speke
- Single-storey extensions in Garston
Learn more about single-storey extensions, or see every project we cover in Merseyside.