Free Loft Conversion quotes across the UK
Finding a reliable Loft Conversion at a fair price doesn’t have to be difficult. Our free service connects you with vetted independent tradespeople across the UK — no call centres, no middlemen, just local professionals.
Loft Conversion jobs typically cost between £20000 and £60,000 depending on the scope of work and materials. Getting 3 quotes is the best way to ensure you pay a fair price.
Why use Trade Quote Network?
Get competing quotes and choose the best combination of price, availability and reviews.
Every tradesperson is checked for experience, insured, and reviewed by previous customers.
Tradespeople working within your area — not national call centres or franchises.
No charge to compare quotes. You only pay the tradesperson you choose to book.
Typical Loft Conversion costs
Call-out & assessment
£6000 – £14000
Small / straightforward job
£20000 – £28000
Mid-range job
£28000 – £40000
Larger or complex job
£40000 – £60,000
Get 3 quotes to compare local prices in your area.
Loft Conversion services we cover
- Velux & roof light conversion
- Dormer loft conversion
- Mansard conversion
- Hip-to-gable conversion
- Loft boarding & insulation
- Structural drawings & planning
- Staircase installation
- Loft office or bedroom
About our Loft Conversion network
Our network of tradespeople are independent local specialists with years of experience. You deal directly with the person doing the work — no franchises, no markups.
Most tradespeople can attend within 24–48 hours of booking. Getting quotes is completely free — describe your job, enter your postcode and hear back from up to 3 local tradespeople within 24 hours.
Frequently asked questions
Do I need planning permission for a loft conversion?
Most loft conversions fall within permitted development rights and do not need planning permission, provided they meet size and position limits (typically 40m³ for terraced houses, 50m³ for semis/detached). Exceptions include mansards, hip-to-gable conversions, properties in conservation areas, and adding a balcony. Your builder will advise.
How much does a loft conversion cost?
A Velux (roof light) conversion is the simplest and cheapest at £20,000–£35,000. A dormer adds significantly more space and costs £30,000–£50,000. A mansard conversion (popular in London terraces) runs £45,000–£70,000. Prices include structural work, insulation, staircase, electrics and plastering.
How long does a loft conversion take?
A Velux conversion takes 4–6 weeks. A dormer conversion takes 8–12 weeks. A mansard or hip-to-gable can take 3–4 months. Planning permission (if required) adds 8–12 weeks before building work starts.
Does a loft conversion add value to my home?
A loft conversion typically adds 15–25% to a property's value — often exceeding the cost of the work in areas where bedroom count is a key price driver. An extra bedroom with en-suite is the most valuable use of the space. Always check with a local estate agent before committing to the scale of the project.
What building regulations apply to a loft conversion?
Building Regulations approval is required for all loft conversions (separate from planning permission). Key requirements cover fire safety (fire doors, mains-wired smoke alarms, protected escape route), structural integrity (new joists, steels), insulation and staircase design. Your conversion contractor will manage this.
How much headroom do I need for a loft conversion?
You need a minimum of 2.2m from the floor joist to the ridge at the highest point to make a comfortable usable room (building regulations require 2m minimum at the stairhead). A surveyor or loft specialist can measure your roof structure and confirm viability before you commit.
