Range from the cheapest £15 per hour and £140 per day (NG Builders based in BT78) to the dearest £21 per hour and £173 per day (Tyrone Turbos based in BT82).
Comparing hourly and daily rates of Extension Builder's gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
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See table for all Extension Builder rates in Castlederg
| Job details | Estimate |
| Underpinning a house | £1127 |
| Build a two storey extension | £3758 |
| Build a timber frame extension | £3758 |
| Install a swimming pool | £2255 |
| Cost to build a single storey extension | £30061 |
| Cost to build a side return extension | £34570 |
| Install an RSJ | £658 |
| Build an outbuilding | £1503 |
| Build a mansard loft conversion | £7515 |
| Cost of a loft conversion | £21043 |
| Build a kitchen extension | £7515 |
| Build a hip to gable loft conversion | £5636 |
| Build a granny annexe | £3758 |
| Build a garden office | £1503 |
| Convert a garage | £752 |
| Build a new garage | £1503 |
| Build a flat roof extension | £1278 |
| Build a dormer loft conversion | £1503 |
| Lay a concrete foundation | £1503 |
| Convert a bungalow loft | £2255 |
| Basement conversion cost | £21043 |
| Business name | Hourly Rate | Daily Rate |
|---|---|---|
| NG Builders, Omagh, BT78 | £15 | £140 |
| Tyrone Turbos, Tyrone, BT82 | £21 | £173 |