Range from the cheapest Side return extension £31,150 (Building & Flat Roofing Contractors based in LL54) to the dearest Side return extension £37,000 (W F CLAYTON & CO LTD based in LL57).
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 Holyhead.

| Business name | Side return extension cost |
|---|---|
| Glyndwr Roofing & Building Services, Holyhead, LL65 | £33,850 |
| Property Maintenance Solutions, Benllech , LL74 | £33,400 |
| Balmoral joinery/construction , Gaerwen gwynedd , LL60 | £34,120 |
| Hughes Construction, Bangor, LL57 | £34,030 |
| W F CLAYTON & CO LTD, Bangor, LL57 | £37,000 |
| Building & Flat Roofing Contractors, Caernarfon, LL54 | £31,150 |