Building services in Monmouth
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Monmouth
| Project | Guide range (inc VAT) |
|---|---|
| Double-storey extensions | £1,500–£2,300 per m² of floor area (both floors) |
| Kitchen extensions | £2,050–£3,150 per m² including a mid-range kitchen |
| Hip-to-gable loft conversions | £50,500–£72,000 for a hip-to-gable with rear dormer |
| Garage conversions | £16,500–£27,500 for a single integral garage |
| Structural alterations and knock-throughs | £4,250–£8,750 for a typical knock-through with steel beam |
| Orangeries | £2,200–£3,150 per m² of floor area |
We start from a UK-wide guide and adjust it for Wales, where labour and materials are typically about 8% below average.
Planning permission in Monmouth
In Wales a single-storey rear extension is often permitted development: up to 4 metres beyond the rear wall and up to 4 metres high, with eaves no higher than 3 metres within 2 metres of a boundary and no more than half the land around the original house covered. Wales has no larger home extension prior approval route, so deeper extensions need a planning application, as do extensions to flats, listed buildings and houses whose rights have been removed.
Building regulations in Wales are set by the Welsh Government. Approval comes from the council’s building control service or a registered building control approver, with inspections during the work and a completion certificate at the end.
About building in Monmouth
Wales has many terraced valley streets, stone cottages and post-war estates, so extension designs are shaped by slopes, materials and local character.
We work across Monmouth and neighbouring areas such as Chepstow, Abergavenny and Caldicot. Postcodes we cover in Monmouth include NP25. Monmouth has a population of around 10,000.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and fixed quote
Drawings, structural calculations and an itemised, fixed price for the agreed specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions from homeowners in Monmouth
Do you work in Monmouth?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Monmouth, including postcodes NP25.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
How much does a loft conversion cost in Monmouth?
A rear dormer loft conversion in Monmouth typically costs £44,000–£62,500 for a typical rear dormer with en-suite, including VAT.
Do I need planning permission for an extension in Monmouth?
In Wales a single-storey rear extension is often permitted development: up to 4 metres beyond the rear wall and up to 4 metres high, with eaves no higher than 3 metres within 2 metres of a boundary and no more than half the land around the original house covered. Wales has no larger home extension prior approval route, so deeper extensions need a planning application, as do extensions to flats, listed buildings and houses whose rights have been removed.
How much does an extension cost in Monmouth?
A single-storey extension in Monmouth typically costs £1,800–£2,650 per m² of floor area, and a double-storey extension £1,500–£2,300 per m² of floor area (both floors), including VAT.