What is a bungalow loft conversion?
A bungalow loft conversion uses the large roof space of a bungalow to add bedrooms and a bathroom, turning it into a chalet bungalow. Dormers at the front, rear or both create headroom; some projects raise the roof entirely.
How much does a bungalow loft conversion cost in South Glamorgan?
In South Glamorgan, a bungalow loft conversion typically costs £41,500–£73,500 for a typical bungalow conversion with dormers, including VAT at 20% (standard rate). Prices across Wales are typically 8% below the UK average for this kind of work, which is reflected in the range for South Glamorgan. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A typical bungalow conversion with dormers | £41,500–£73,500 |
| Higher specification | £73,500–£92,000 |
What moves the price most:
- Finishes
- Number and size of dormers
- Staircase position within the bungalow
- Fire escape design
Use the guide price tool to see how size and specification change the figure, then ask for a written, itemised quote.
Do you need planning permission for a bungalow loft conversion in South Glamorgan?
Here is how the rules work for a bungalow loft conversion in Wales. In Wales rear dormers may be permitted development within volume limits; front dormers and roof raises need planning permission.
The Party Wall etc. Act 1996 applies in Wales, so notices must be served before work on a shared wall, on the boundary, or excavation close to a neighbour’s foundations.
Our first visit includes a check of your planning history, so you know the route before paying for drawings.
What we handle
From survey to sign-off, the job normally involves:
- Drawings and structural calculations
- New floor structure and staircase
- Survey and planning check
- Building control sign-off
- Fire-safe escape windows or route
- Insulation, electrics, plumbing and plastering
How long does it take?
Allow 8 to 14 weeks on site. Design and approvals come first and typically take 3 to 4 months, depending on the approval route.
Building in South Glamorgan
Terraced houses in Welsh towns often have narrow plots, which suits rear and side return extensions and rear dormers.
Towns we cover in South Glamorgan include Cardiff, Barry and Penarth.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 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 about bungalow loft conversions in South Glamorgan
Who approves a bungalow loft conversion in South Glamorgan?
Planning matters in South Glamorgan go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.
Do I need planning permission for a bungalow loft conversion in South Glamorgan?
In Wales rear dormers may be permitted development within volume limits; front dormers and roof raises need planning permission.
Will the bungalow still be valued as a bungalow?
It becomes a chalet bungalow. Whether that adds value depends on local demand.
How much does a bungalow loft conversion cost in South Glamorgan?
In South Glamorgan, a bungalow loft conversion typically costs £41,500–£73,500 for a typical bungalow conversion with dormers, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
Where does the staircase go?
Usually from the hallway or a bedroom that becomes a landing. Losing a little ground-floor space is normal.
How long does it take?
Around 8 to 14 weeks on site depending on the scope.