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Scotland

Extensions in Forth Valley: design, planning and build

Planning an extension in Forth Valley? Compare extension types, see guide prices adjusted for Forth Valley and book a free site visit.

  • Towns listed4
  • Price regionScotland (×0.98)
  • Planning rulesScotland
  • Postcode districts23
Orangery extension with brick piers, a glass roof lantern and French doors

Towns we cover in Forth Valley

Towns we cover here include Stirling, Falkirk, Alloa, Grangemouth.

Choosing the right extension in Forth Valley

Scotland's housing includes sandstone villas, terraces and tenements in the cities and plenty of post-war and modern houses and bungalows elsewhere. A building warrant is needed before work starts.

For many houses here, single-storey rear extensions, double-storey extensions or bungalow extensions gives the most useful space for the budget.

Forth Valley extension prices at a glance

Every figure below is a guide for Forth Valley, adjusted for Scotland build costs (×0.98) and including VAT. Design and council fees are shown separately on each page.

Extension typeExample sizeStandard spec (inc VAT)
Single-storey rear extensions20 m²£40,000 – £51,000
Kitchen extensions20 m²£41,000 – £52,000
Extensions over a garage12 m²£24,500 – £32,000
Conservatory replacement extensions14 m²£29,000 – £38,000
Wraparound extensions25 m²£56,000 – £71,500
Orangery extensions16 m²£43,500 – £55,000

Planning and building control in Forth Valley

In Scotland, householder permitted development rules (Class 1A for single-storey ground-floor extensions and Class 1B for extensions of more than one storey) allow some smaller extensions without a planning application, within limits on depth, height and distance from the boundary. Conservation areas and listed buildings are more restricted.

In a conservation area or national scenic area the householder permitted development rights are more limited, listed homes need listed building consent, and if rights have been removed by a condition or direction, any extension needs an application.

In Scotland a building warrant from the council is needed before work starts on almost any extension, and a completion certificate is issued when the work is accepted. Building standards are set in the Scottish technical handbooks.

Questions about extensions in Forth Valley

How much does an extension cost in Forth Valley?

With our Scotland factor (×0.98), a standard-spec 20 m² single-storey extension is a guide £40,000 to £51,000 including VAT. Prices for every type are linked on this page.

Will my neighbours need to be told?

If you apply for planning permission the council notifies neighbours, and we agree access with them in writing for work near a shared boundary.

Do I need planning permission for an extension in Forth Valley?

Not always. It depends on the size, position and your property's history. Scottish householder rules allow some smaller extensions without an application, but a building warrant is still needed.

Do you cover all of Forth Valley?

Yes, across the whole of Forth Valley. Site visits are free and there is no obligation.

Book a free site visit in Forth Valley

We will measure up, check the planning position and give you honest guide figures.

  • Free, no-obligation site visit
  • Planning route checked before you spend on drawings
  • Written price once the design is agreed
  • Building control sign-off at the end

Prefer to talk? Call 0800 088 6341 or .

Book a free site visit

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