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Dormer Loft Conversion

  • 30 years experience
  • 10-year structural guarantee
  • Fixed fee quotation
  • 5% Scheduling discount
  • 500+ Successful projects

New bedroom and ensuite added in Surbiton with a rear dormer

For this home in Surbiton, the homeowners needed an additional bedroom and a comfortable ensuite without losing garden space. We designed and built a dormer loft conversion that maximised head height, improved natural light and created a calm top-floor retreat.

The build included structural reinforcement, new floor formation, staircase installation and careful fire safety detailing. We managed approvals and inspections in line with Building Regulations, and specified upgraded insulation to improve year-round comfort and reduce heat loss.

  • Location :KT6 (Surbiton)
  • Project Type :Dormer Loft Conversion
  • Duration :3 Months
  • Completion :22/07/2025
Dormer loft conversion in Surbiton KT6 creating a new bedroom and ensuite Rear dormer construction stage in Surbiton KT6 Completed loft bedroom with dormer in Surbiton KT6

What we did

We kept the build tight and efficient with a clear programme, regular updates and quality checks at each stage.

  • Loft survey, layout planning and head height optimisation.
  • Structural strengthening, new joists and dormer formation.
  • Insulation upgrades, vapour control and ventilation detailing.
  • New stairs, fire safety measures and second fix joinery.
  • Ensuite installation with robust waterproofing and extraction.

"The dormer has completely changed our home. The new room is bright and feels surprisingly spacious. Communication was excellent and everything was managed professionally."

The Khan Family - Surbiton

Conclusion

This dormer loft conversion delivered a well-proportioned bedroom and ensuite, with improved insulation and a clean finish. The family gained valuable living space while keeping the existing footprint and garden intact.

Loft ensuite detail in Surbiton KT6 dormer conversion
Loft staircase and landing in Surbiton KT6 dormer loft conversion

Key Points

  • Rear dormer added to maximise usable floor area and head height.
  • New staircase designed for safe, comfortable access.
  • Insulation and ventilation specified for year-round comfort.
  • Fire safety measures designed into the build from day one.

Value Added

  • Extra bedroom and ensuite without extending the footprint.
  • Improved thermal performance and reduced drafts.
  • Higher resale appeal with an additional well-finished room.
  • Single team delivery from design through completion.

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Loft Conversion FAQ's

Many dormers can fall under permitted development, but it depends on volume, roof alterations and local constraints. We advise early and handle applications if needed. See: /services/planning-permission/.

We coordinate structure, insulation, stairs and fire safety requirements and manage inspections with Building Control. See: /services/building-regulations/.

Yes, where required. We design escape routes and fire protection measures to meet current standards.

Most dormer loft conversions run around 3 months, depending on complexity, access and finishes.

Yes. We plan drainage runs, ventilation and waterproofing details early to avoid compromises later.

Yes. We manage the process from surveys and drawings to delivery and handover. See: /services/design-and-build/.