Range from the cheapest Side return extension £37,000 (GENERAL BUILDING SERVICES based in KT1) to the dearest Side return extension £46,000 (A Dawson Building Surveys Ltd based in IM4).
Comparing extension builders estimates for Side return extension gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for a side return extention by posting your job to extension builders in Onchan.

| Business name | Side return extension cost |
|---|---|
| GENERAL BUILDING SERVICES, Kingston upon Thames, KT1 | £37,000 |
| A Dawson Building Surveys Ltd, Higher Foxdale , IM4 | £46,000 |