Cost of a two storey extension in HP3
A two storey extension is a great way to add extra space to your home, adding value to your property. But how much does it cost to build a double storey extension in HP3?
Costs range from £85120 (Hertfordshire brickwork based in Hp1) to £88600 (Absolute kitchen and bathroom based in HP3), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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Estimates for common extension builder jobs in HP3;
| Job | Estimate |
| Underpinning a house | £17348 |
| Build a two storey extension | £87772 |
| Build a timber frame extension | £25848 |
| Install a swimming pool | £80848 |
| Cost to build a single storey extension | £46954 |
| Cost to build a side return extension | £35786 |
| Install an RSJ | £2048 |
| Build an outbuilding | £9848 |
| Build a mansard loft conversion | £51848 |
| Cost of a loft conversion | £32322 |
| Build a kitchen extension | £41848 |
| Build a hip to gable loft conversion | £41848 |
| Build a granny annexe | £86848 |
| Build a garden office | £9848 |
| Convert a garage | £15848 |
| Build a new garage | £18348 |
| Build a flat roof extension | £21848 |
| Build a dormer loft conversion | £41848 |
| Lay a concrete foundation | £6098 |
| Convert a bungalow loft | £28848 |
| Basement conversion cost | £35786 |