Covering Merthyr Tydfil
Our coverage around Merthyr Tydfil (CF47) also includes Aberdare (4 miles to the south-west) and Rhondda.
Homes in Mid Glamorgan
Across Wales you find valley terraces, coastal towns, rural stone houses and newer estates, so access, slopes and local materials all feature in the design.
What does an upward extension involve?
An upward extension adds a new storey on top of an existing house, most often turning a bungalow into a two-storey or chalet-style home. It can double the floor area without using any of the garden.
- Structural survey of walls and foundations
- Roof removal and temporary weather protection
- Full fit-out of the new rooms
What is the guide price for an upward extension in Merthyr Tydfil?
What bungalow and upward extensions typically cost. These are guide ranges; the written quote for your house replaces them.
| Bungalow and upward extensions | Guide price incl. VAT |
|---|---|
| Chalet conversion with dormers (total) | £45,000 to £85,000 |
| New first floor, standard specification | £2,200 to £2,800 per m² |
| New first floor, good specification | £2,800 to £3,300 per m² |
| New first floor, high specification | £3,300 to £3,800 per m² |
How is an upward extension approved in Merthyr Tydfil?
Welsh projects need planning clearance from the council under Welsh rules, building regulations approval under the Welsh approved documents, and party wall notices where the work affects a neighbour’s wall or foundations.
Adding a storey in Wales needs planning permission. We prepare the application with drawings showing how the new roofline fits the street.
What can change the price or programme?
- The staircase takes space from the ground floor plan.
- Neighbours’ light and privacy are the main planning tests.
From first call to completion
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
- Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
Questions about an upward extension in Merthyr Tydfil
How much does it cost to add a storey?
Around £2,200 to £3,800 per square metre of new floor including VAT, or £45,000 to £85,000 for a chalet conversion with dormers.
How long does it take?
About 12 to 24 weeks on site.
Can you visit a house in Merthyr Tydfil 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.
Other towns nearby
- Bungalow and upward extensions in Aberdare
- Bungalow and upward extensions in Rhondda
- Bungalow and upward extensions in Ebbw Vale
- Bungalow and upward extensions in Tonypandy
Learn more about bungalow and upward extensions, or see every project we cover in Merthyr Tydfil.

