A loft conversion turns unused roof space into a habitable room such as a bedroom, bathroom or office, with a proper staircase, insulation, fire protection and natural light from rooflights or a dormer.
If you are planning a loft conversion anywhere in Dyfed, including Llanelli, Ammanford, Aberystwyth and Carmarthen, we can visit, measure up and talk through the options. The planning and building regulations we work to are those for Wales, and we check them for your address before quoting. Prices remain guide figures for Wales, at £27,500–£60,000 including VAT, until the survey is done.
- Guide price
- £27,500–£60,000 inc VAT
- Time on site
- 6–10 weeks on site
- Planning rules
- Wales
- Price level
- About 8% below the national guide
- Towns listed
- 4
- Survey
- Free, with a written quote
How much does a loft conversion cost in Dyfed?
Here is how the guide price for a loft conversion breaks down in Dyfed. We start from national figures and adjust for Wales, which comes out about 8% below the national guide. The resulting range, VAT included, is £27,500–£60,000, and a survey, at no cost to you, firms it up.
| Type of job | What it usually involves | Guide in Dyfed |
|---|---|---|
| Rooflight conversion | Rooflights in the existing slope, a new floor, staircase and insulation, where head height already works. | £18,500–£32,000 |
| Dormer conversion | A rear dormer adding headroom and floor space, often with a bedroom and shower room. | £29,500–£55,000 |
| Hip-to-gable or mansard | Larger structural changes to the roof for the maximum usable space. | £46,000–£78,000 |
Your price depends mostly on:
- Conversion type: rooflight, dormer, hip-to-gable or mansard
- Floor area, existing head height and roof structure
- Steelwork and any strengthening of walls below
- Staircase layout, fire doors and the level of finishes
What do you get?
- New floor joists strong enough for a habitable room
- Dormer, hip-to-gable or rooflight structure as agreed
- Staircase designed to fit your landing and meet regulations
- Insulation to walls, roof slope and floor
- Fire doors, mains-linked smoke alarms and a protected escape route
- Electrics, heating and plumbing by qualified trades, with certificates
Homes in Dyfed
Dyfed covers Carmarthenshire, Ceredigion and Pembrokeshire. Stone cottages and farmhouses under slate roofs are common, often rendered or colour-washed, as in Tenby's brightly painted terraces. Llanelli has Victorian industrial terraces, Aberystwyth and Carmarthen have Georgian and Victorian centres, and bungalows and newer estates surround most towns.
Stone homes often need lime render, repointing and roof slating repairs. Terraces suit loft conversions and extensions, and rural bungalows commonly take extensions, porches and driveways.
Atlantic weather brings strong winds, driving rain and salt to the coast, so exposure ratings matter when specifying render and pointing.
Do you need permission in Dyfed?
The notes below cover Wales, which is where Dyfed sits. Rules change and every property is different, so we speak to the council before pricing your job.
In Wales, loft conversions and dormers can be permitted development within volume and position limits (for example, dormers on rear-facing slopes and set back from the eaves). Conservation areas and listed buildings need planning permission.
Building Regulations approval is needed in Wales, and the Party Wall etc. Act 1996 applies to work on shared walls.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
How does the job run?
We look at the job
A free survey comes first. It gives us what we need to price a loft conversion properly, including dimensions, existing materials and access for deliveries, and gives you the chance to ask anything you like.
Price and scope agreed
After the survey we send a quote for a loft conversion that fixes the price for the scope we've agreed. If you want to change materials or scope, we revise it in writing before anything is booked.
Getting ready
We handle the paperwork side: checking whether planning permission or building control approval is needed, submitting applications where they are, and scheduling the trades and materials around your dates.
The work itself
Work goes ahead as scheduled and you deal with one contact throughout. When the last trade leaves, we clear and clean the site, talk you through what has been done and pass on any certificates and care instructions.
How we work
Frequently asked questions
How much does a loft conversion cost?
A typical dormer loft conversion on a 3-bed semi costs £27,500–£60,000. A simple rooflight conversion costs less, while hip-to-gable and mansard conversions cost more because they change the roof structure. As a rough guide, allow around £800–£1,700 per square metre of new floor plus fixed costs for the staircase, steels and fees. Adding a shower room is the most common extra. We confirm a fixed price after surveying your loft.
Do I need planning permission in Dyfed?
It depends on the work, the size of the project, your property type and whether the building is listed or in a conservation area. Dyfed is in Wales, so Wales's rules apply. Many smaller jobs need no planning application, but some still need building control approval. We check what applies to your address before quoting.
Where will the new staircase go?
The new staircase usually sits above the existing stairs, rising from the landing so it uses space that is already circulation. Sometimes it needs to come from a small bedroom or box room, which reduces that room's size. Building regulations set rules on headroom, step size and handrails, with some flexibility for lofts. We look at options at the survey and show you how each affects the floor below.
Do I need planning permission for a loft conversion?
Whether a loft conversion needs planning permission depends on its size and design, your home's location, whether it is listed or in a conservation area, and which UK nation you live in. In England, many conversions fall under permitted development if the added volume is within 40m³ for terraced houses or 50m³ for other houses and nothing extends beyond the front roof slope. We check what applies before quoting.
Do you cover Llanelli, Ammanford and Aberystwyth?
Yes. As well as Dyfed, we cover Llanelli, Ammanford and Aberystwyth and the rest of Dyfed. Our coverage is UK-wide, so the process is the same wherever you are: a free site survey, a quote in writing that fixes the price for the agreed scope, and one point of contact while the work is planned and carried out.
Towns in Dyfed
We offer a loft conversion in each of the towns below, all within Dyfed. Select yours for guide prices, postcodes covered and nearby places.