Updated October 2026 · Fraser Bond
Construction service
Loft Conversions: Creating a Legal Bedroom
Head height and space
A usable loft needs enough height over the stairs and much of the floor. Around 2.2m at the highest point before work is a common starting point; dormers and mansards add space.
Types of loft conversion
Roof-light conversions are the cheapest; rear dormers add the most usable space on terraces; hip-to-gable and mansards cost more but create full rooms.
Value and rent
An extra bedroom and bathroom can add meaningful value or rent in London. As agents, we can estimate the uplift before you commit.
What Fraser Bond does on building projects
- Site visit and a clear scope of works
- Design, drawings and specification
- Written, itemised quote and programme
- Planning, building control and landlord or freeholder consents
- Managed works with one point of contact
- Snagging, completion certificates and handover
How it works
Illustrative London ranges excluding VAT, fees and party wall costs.
Frequently asked questions
Keep exploring
How to Rent an Apartment in London: What to Check FirstRENTING GUIDE
When Can a Landlord Keep Your Deposit? Your Rights in EnglandRENTING GUIDE
Weekly to Monthly Rent Conversion: The Right Way to Calculate
Browse every guide in The London Renter's Hub → · London area guides →
Handy tools
Stamp duty calculatorRental yield calculatorMove-in costsBTL deposit calculatorRefurb cost per m²
Tell us your budget and area and hear about homes first.
Do I need planning permission?
Often not for houses under permitted development, but flats, conservation areas and mansards usually do.
Will I need a party wall agreement?
Usually yes on terraced and semi-detached houses.
How long does it take?
Typically 6–10 weeks on site.
Get a loft conversion quote
Send us the address and what you need. We will arrange a visit or call and give you a written quote.
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