Highlands and Islands
Flat-roof rear extensions in the Highlands and Islands
Warm flat roofs with lanterns, parapets and long-life membranes. We design and build rear extensions across the Highlands and Islands, from Inverness and Elgin to Nairn, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
Island and remote addresses in the Highlands and Islands are by arrangement: we confirm whether we can take the job, and agree any travel costs, before the first visit.
Flat roofs are the usual choice for rear extensions because they stay below first-floor windows and take a lantern neatly. Highlands and Islands has older stone houses, post-war homes and many detached houses and bungalows on larger plots. Wind and rain shape the design: roof pitch, cladding and glazing are chosen for the weather, and every extension needs a building warrant.
How much does a flat-roof rear extension cost in the Highlands and Islands?
Guide prices for a flat-roof rear extension in the Highlands and Islands start from our Scotland rate of £1,800–£2,940 per square metre, including VAT. Prices in Scotland sit a little below our West Midlands baseline; building warrant fees and drawings are budgeted separately.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,500–£35,500 |
| 4 m wide × 5 m deep (20 m²) | £36,000–£59,000 |
| 4 m wide × 6 m deep (24 m²) | £43,500–£70,500 |
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 in the Highlands and Islands?
Scottish householder permitted development (Class 1A) covers many single-storey rear extensions, with a 3 metre eaves limit, a 4 metre height limit and, within 1 metre of a boundary, a depth limit of 3 metres for terraced houses or 4 metres for others. Conservation areas are excluded, and you need a building warrant whatever the planning position.
Insulation and glazing follow Section 6 of the Scottish Technical Handbook; the building warrant drawings show how the extension meets it.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent.
Where in the Highlands and Islands do we work?
FAQ
Questions people ask
How long does a flat roof last?
A well-built single-ply or GRP warm roof typically lasts 25 years or more.
Is a flat roof really flat?
No; it is built to falls so water drains to outlets or gutters.
Can I walk on it?
Not as a balcony without planning permission and a guarding design; it can be accessed for maintenance.
Do you cover all of the Highlands and Islands?
We cover 5 towns and districts in the Highlands and Islands, including Inverness, Elgin and Nairn. Remote and island addresses are by arrangement.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.