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.
Addresses across PA5 fall within our coverage for a loft conversion, so if your home is in Johnstone we can arrange a survey on a day that works for you. We inspect the existing building, discuss materials and layout, and then price the agreed specification in writing. Expect a guide range of £29,000–£62,000 including VAT before that visit.
- Guide price
- £29,000–£62,000 inc VAT
- Time on site
- 6–10 weeks on site
- Postcodes
- PA5
- Planning rules
- Scotland
- Local area
- Renfrewshire
- Survey
- Free, with a written quote
Loft conversions prices in Johnstone
Here is how the guide price for a loft conversion breaks down in Johnstone. We start from national figures and adjust for Scotland, which comes out about 4% below the national guide. The resulting range, VAT included, is £29,000–£62,000, and a survey, at no cost to you, firms it up.
| Type of job | What it usually involves | Guide in Johnstone |
|---|---|---|
| Rooflight conversion | Rooflights in the existing slope, a new floor, staircase and insulation, where head height already works. | £19,000–£33,500 |
| Dormer conversion | A rear dormer adding headroom and floor space, often with a bedroom and shower room. | £30,500–£58,000 |
| Hip-to-gable or mansard | Larger structural changes to the roof for the maximum usable space. | £48,000–£82,000 |
The main things that change the figure:
- Conversion type: rooflight, dormer, hip-to-gable or mansard
- Floor area, existing head height and roof structure
- Steelwork and any strengthening of walls below
- Adding a shower room or en-suite in the roof
What does the job include in Johnstone?
- New floor joists strong enough for a habitable room
- 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
- Plastering, internal doors and building control sign-off
Homes in Renfrewshire and Inverclyde
Paisley has sandstone tenements and terraces from its textile era, Greenock and Port Glasgow have tenements and housing climbing the hills above the Clyde, and Gourock and Kilmacolm have Victorian villas. Post-war estates and newer private housing surround the towns, and roughcast is a common finish.
Roughcast and tenement buildings commonly need re-rendering, window replacement and roof work. Villas suit kitchen extensions and landscaping, and semis often take loft conversions and driveways.
Knowing the typical building types in Renfrewshire and Inverclyde helps, but a survey of your own home in Johnstone is what decides the right approach to a loft conversion.
Permissions for a loft conversion in Johnstone
England, Wales, Scotland and Northern Ireland each handle planning a little differently. Johnstone comes under Scotland, covered below, and we raise any questions with the council before your quote is finalised.
In Scotland, dormers are only permitted development in limited cases (for example, at least 10 m from the boundary the dormer faces, and not in conservation areas), so many loft conversions with dormers need planning permission. Rooflight-only conversions are often simpler.
A building warrant is required for a loft conversion in Scotland, covering structure, stairs, insulation and fire safety. There is no Party Wall Act.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
From survey to handover
We look at the job
Book a visit and we'll come to you. The survey covers measurements, the state of what's there now and any obvious constraints, so the price that follows is based on your actual home, not an average.
Quote in writing
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.
Dates and permissions
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.
On site to finish
The job proceeds in the order set out in the programme, with dust and debris kept under control. Finally we tidy away, inspect the work together and pass the finished project over to you with its paperwork.
How we work
Frequently asked questions
How much does a loft conversion cost?
A typical dormer loft conversion on a 3-bed semi costs £29,000–£62,000. 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.
Who do I deal with during the job?
One point of contact manages your project from survey to handover. They schedule the trades working under our contract, keep you updated on progress, and are the person to call with any question. You don't need to coordinate builders, electricians or decorators separately, because that is part of what we do.
Can I put a bathroom in my loft?
A bathroom or shower room can usually be added in a loft conversion if waste pipes can reach the soil stack with enough fall, or a pumped system can be used. Dormers make this easier because they give standing height for a shower. Water pressure, extraction and the position of the boiler also matter. We plan the bathroom layout at the design stage so pipes are hidden in the structure.
What fire safety measures does a loft conversion need?
A loft conversion needs a safe way out in a fire, because the new room is high above the ground. This usually means a protected stair route down to an exit, with fire doors onto the stairway, mains-linked smoke alarms on each floor and sometimes an escape window. The exact approach depends on your house layout. Building control checks these measures before signing off the work.
How much will a loft conversion cost in Johnstone?
As a guide, expect to pay £29,000–£62,000 including VAT for a loft conversion in Johnstone. That range is adjusted for Scotland, which runs about 4% below the national guide. Where your project lands depends on size, materials, access and the condition of what is already there. We confirm a fixed price in writing after a free survey of your home.
Near Johnstone
Coverage for Johnstone spans PA5. Close by, Paisley, Barrhead and Erskine are covered too, and the rest of our UK-wide area follows the same survey-then-quote process from start to finish.