Loft Conversions
Unlock unused space above your head. We handle structural work, insulation, electrics, and finishing to create rooms you will actually want to use.
Discuss Your Project
What's Included
Our Process for Loft Conversions
Structural Survey
We assess your roof structure, headroom, and load-bearing capacity. Structural engineer input if needed.
Planning & Design
Building Control applications, fire safety planning, and detailed scope agreement including staircase options.
Structural Works
Steel beam installation, roof alterations, dormer construction, and window fitting.
Second Fix & Finish
Insulation, electrics, plumbing, plastering, carpentry, and final decorating. Building Control sign-off.
Featured Loft Work
Loft conversions completed across Greater London, from compact home offices to spacious master suites with en-suite bathrooms.



Why Choose Pimi for Loft Conversions
Structural Expertise
Not all lofts are suitable for conversion. We conduct thorough structural assessments and work with engineers to ensure your roof can safely support the additional load.
Building Control Compliance
Loft conversions require Building Control approval for structure, fire safety, insulation, and access. We handle all submissions and inspections to ensure first-time sign-off.
Space Maximisation
We design staircases that minimise footprint loss on the floor below and optimise headroom in the loft. Every square metre counts.
Typical Timeline
Budget Guidance
Loft conversion costs vary based on complexity and specification:
- Velux conversion (basic bedroom): £35k-£45k
- Rear dormer conversion: £45k-£60k
- Full dormer with en-suite: £55k-£70k
- Hip-to-gable with dormers: £65k-£85k
Prices include all structural work, Building Control, and standard finishes. Request a site survey for accurate pricing.
Frequently Asked Questions
Do I need planning permission for a loft conversion?
Most loft conversions fall under Permitted Development and do not require planning permission. However, you always need Building Control approval. We will assess your property and advise on requirements.
How do you ensure fire safety compliance?
We install fire-rated doors, upgrade your existing doors if needed, and ensure escape routes meet Building Regs. This often includes upgrading the landing smoke detector to a mains-powered interlinked system.
Will the work disrupt the rest of the house?
There will be some noise and dust, especially during structural works. We seal off the work area, use dust extraction, and schedule noisy work for agreed times. Most families stay in the house during the conversion.
Can you install an en-suite bathroom?
Yes, if there is space and access for plumbing. We will assess during the survey whether it is feasible to route waste pipes and water supply to your loft.
What happens if your survey finds the roof structure is inadequate?
We provide options to strengthen the structure with additional steelwork or alternative approaches. If conversion is not viable, we will tell you before you commit to any costs beyond the survey.
Ready to unlock your loft space?
Message us on WhatsApp for a quick response, or book a free structural survey to discuss feasibility.