Covering Monmouth
Alongside Monmouth, we also cover Ross-on-Wye, Chepstow (12 miles to the south) and Abergavenny.
Homes in Gwent
Welsh homes include long terraces built into hillsides, stone cottages and modern estates, and sloping sites often shape how and where an extension can go.
What does a dormer loft conversion involve?
A dormer loft conversion builds a box-shaped extension out from the rear slope of the roof, creating vertical walls and full head height across most of the new floor. It is the most popular type of loft conversion because it gives the most usable space for the cost.
- Planning and building regulations checks under Welsh rules
- Staircase, insulation and plasterboard
- En-suite, electrics and fire-protected escape route
What will a dormer loft conversion cost?
Typical ranges for dormer loft conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.
| Dormer loft conversions | Guide price incl. VAT |
|---|---|
| Rear dormer, bedroom only | £50,000 to £65,000 |
| Full-width dormer with en-suite | £60,000 to £80,000 |
| L-shaped dormer (over rear outrigger) | £65,000 to £90,000 |
Do you need permission for a dormer loft conversion in Monmouth?
In Wales the planning rules, including what counts as permitted development, are set by the Welsh Government, and Welsh building regulations differ in places from England’s. We check both against your house before drawings are finalised, and handle party wall notices where needed.
Wales has its own loft and roof permitted development rules.
What can change the price or programme?
- A flat dormer roof needs proper falls and a quality membrane.
- L-shaped dormers are common on Victorian terraces with a rear outrigger.
What are the steps?
- Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
- Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Dormer loft conversions: common questions
How long does a dormer conversion take?
Around 8 to 12 weeks on site.
Can a dormer include a bathroom?
Yes. The full head height in a dormer makes it the best place for a shower room or en-suite.
Can you visit a house in Monmouth to quote?
Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.
Dormer loft conversions near Monmouth
- Dormer loft conversions in Ross-on-Wye
- Dormer loft conversions in Chepstow
- Dormer loft conversions in Abergavenny
- Dormer loft conversions in Pontypool
Learn more about dormer loft conversions, or see every project we cover in Monmouth.