Extension builder estimates (based on hourly rates) to build a single storey extension in Portland
Range from the cheapest single storey extension £34000 (Poundbury Build and Maintenance based in DT1) to the dearest single storey extension £49360 (WILD CONSTRUCTION LTD based in DT6).
Comparing extension builders estimates for fitting a downstairs toilet 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 to build a single storey extension in Portland by posting a job with HaMuch and we will send it to extension builders in Portland.
Estimates for common extension builder jobs in Portland;
| Job | Estimate |
| Underpinning a house | £17261 |
| Build a two storey extension | £87641 |
| Build a timber frame extension | £25761 |
| Install a swimming pool | £80761 |
| Cost to build a single storey extension | £45218 |
| Cost to build a side return extension | £34810 |
| Install an RSJ | £1961 |
| Build an outbuilding | £9761 |
| Build a mansard loft conversion | £51761 |
| Cost of a loft conversion | £31508 |
| Build a kitchen extension | £41761 |
| Build a hip to gable loft conversion | £41761 |
| Build a granny annexe | £86761 |
| Build a garden office | £9761 |
| Convert a garage | £15761 |
| Build a new garage | £18261 |
| Build a flat roof extension | £21761 |
| Build a dormer loft conversion | £41761 |
| Lay a concrete foundation | £6011 |
| Convert a bungalow loft | £28761 |
| Basement conversion cost | £34810 |