Loft Conversions

Silverain: Your Trusted Local Loft Conversion Experts

Welcome to Silverain, the trusted and respected loft conversion specialists in Wimbledon, London. With our team of highly skilled and experienced professionals, we are committed to delivering outstanding services that are tailor-made to suit your unique requirements. 

Share your vision with us today and witness how we transform it into a vibrant reality that exceeds your expectations. Contact us now and embark on your journey towards a stylish and functional loft space.

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House Extension - Silverain

Silverain Loft Conversions

Loft Conversion

We have used on a number of projects and they truly deserve the top score of 5 stars – very high quality outcome and service, polite, trustworthy – I could go on. Lovely to work with – I will be back!

Mr P from Wimbledon – review on Google

Loft Conversions FAQs

Usually No. Most loft conversions fall under Permitted Development Rights if they meet volume limits and do not alter the roof shape excessively.

Exceptions include:

  • Properties in conservation areas
  • Flats/maisonettes
  • Roofs being raised or significantly altered

These allow certain types of home extensions without a planning application, provided the design meets rules on height, footprint, materials, and distance from boundaries. Listed buildings and flats do not qualify.

  • Rooflight (Velux) – least structural work, most cost-effective
  • Dormer – adds headroom and usable floor space
  • Hip-to-Gable – converts sloped hip roof to vertical gable
  • Mansard – maximises space; usually needs planning
  • L-shaped Dormer – common for terraces with rear additions
  • Velux / Rooflight: 4–6 weeks
  • Dormer: 6–10 weeks
  • Hip-to-Gable or Mansard: 8–12+ weeks

Times vary depending on structural changes and finishes.

Typical UK price ranges:

  • Velux: £20,000–£35,000
  • Rear Dormer: £35,000–£55,000
  • Hip-to-Gable: £45,000–£65,000
  • Mansard: £60,000–£90,000+

Costs vary by size, region, and specification.

Yes — usually 15–25% added value depending on design, location, and use (bedroom + bathroom adds the most value).

Yes. Regulations cover:

  • Structural strength
  • Fire safety and escape routes
  • Insulation (thermal and sound)
  • Stairs
  • Electrical installation

A Building Control officer will inspect throughout the build.

Your loft is suitable if:

  • Head height is around 2.2m+ at the highest point
  • The structure can support additional load
  • There is space for a staircase
  • The roof shape is workable for your chosen style

A builder or architect can confirm suitability.

Yes, but most conversions include eaves storage to retain as much space as possible.

Yes — most loft conversions are done from the outside (scaffolding access), so disruption is minimal until the staircase is installed.

If you share a wall with neighbours (terraced/semi-detached), the Party Wall Act usually applies.

This involves serving formal notices to neighbours before work begins.

Yes. Regulations require:

  • High-performance insulation
  • Fire-rated doors
  • Smoke alarms on every floor
  • Safe escape routes
  1. Survey & design
  2. Structural calculations
  3. Planning (if required)
  4. Building Regs approval
  5. Structural work
  6. Dormer/roof construction (if applicable)
  7. Windows & rooflights
  8. Electrics & plumbing
  9. Insulation & plastering
  10. Stairs installation
  11. Finishing & decoration

Some styles (dormer, hip-to-gable, mansard) alter the roof shape, while Velux-only conversions leave the structure mostly unchanged.

Yes — for Building Regulations, structural calculations, and to ensure accurate pricing and construction.

Possibly. It depends on:

  • Existing water pressure
  • Boiler capacity
  • Location of hot/cold feeds

A plumber can assess this early in the design stage.