Forth Valley
Side return extensions in Forth Valley
Infilling the narrow passage beside a Victorian or Edwardian back addition. Rear extensions in Forth Valley: we cover 6 towns including Stirling, Falkirk and Alloa, with design, approvals and the build under one contract.

In Stirling we check the boundary line and the neighbour's gutter before drawing a side return, because a few centimetres decide whether the wall goes on or beside the boundary. Post-war semis and terraces are common around Forth Valley, and many have room for a single-storey rear extension within Class 1A limits.
How much does a side return extension cost in Forth Valley?
Guide prices for a side return extension in Forth Valley start from our Scotland rate of £2,180–£3,610 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £26,000–£43,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £38,000–£63,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission in Forth Valley?
Scottish householder rights treat the side part of a wraparound or side infill more strictly than a plain rear extension, so most need planning permission, and all need a building warrant.
There is no Party Wall Act in Scotland; neighbour matters are handled through the title deeds, common law and written agreement before work starts.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent.
Where in Forth Valley do we work?
FAQ
Questions people ask
How much space does a side return add?
Typically 8 to 18 square metres, enough to turn a galley kitchen into a kitchen-diner with an island.
Can I combine a side return with a rear extension?
Yes; that is a wraparound extension, and it gives the biggest open-plan room a terrace can have.
Glass roof or solid roof with rooflights?
A glass roof gives the most light; a solid roof with long rooflights is warmer and quieter in rain. Both work.
Do you cover all of Forth Valley?
We cover 6 towns and districts in Forth Valley, including Stirling, Falkirk and Alloa.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.