BrikHaus

Extensions & Conversions

Make the Home You Love Work Harder

Outgrowing your home doesn’t mean you have to move. BrikHaus delivers house extensions and conversions across High Wycombe and surrounding areas, unlocking space for open plan kitchens, home offices, extra bedrooms, or multifunction family rooms. We blend new space with your existing structure for a seamless result.

Why choose BrikHaus

Planning know how

We advise on permitted development vs. full planning and handle submissions.

Structural certainty

RSJs, load paths, and openings set out by qualified engineers; we build once, build right.

Seamless finishes

Materials and profiles matched so the extension looks like it has always been there, or deliberately modern if you prefer contrast.

Programme discipline

Phasing to limit disruption, dust management, and safe segregation of work areas.

Add a new Space

  • House extensions, loft conversions, and garage conversions that add space and value across High Wycombe and nearby towns.

  • Planning advice on permitted development, drawings for approval, and coordination with Building Control and structural engineers.

  • Seamless integration with the existing property using matched materials, tidy detailing, and carefully planned services.

  • Daylight led design with well placed glazing, open plan layouts, and improved flow between kitchen, dining, and living spaces.

  • Heating upgrades with underfloor systems or zoned radiators, insulation improvements, and smart controls for year round comfort.
  • Design Led Transformations

    Structural integrity and integration
    Engineered openings, correctly sized steels, and load paths that protect the existing fabric. New work ties in cleanly so the finished space feels solid and seamless.

    Thermal and acoustic performance
    Upgraded insulation, airtight detailing, and acoustic layers where needed. Warmer rooms, quieter living, and lower energy use from day one.

    Daylight and glazing
    Thoughtful window and door sizing with considered orientations and sightlines. Solar control and ventilation routes that balance light, privacy, and comfort.

    Heating and smart controls
    Underfloor heating or correctly sized radiators with zoned control. Efficient boilers or low temperature systems commissioned for even, responsive warmth.

    Kitchens, bathrooms, and utilities
    Service routes planned early for clean installations. Durable carcasses, quality hardware, waterproofing in wet areas, and easy maintenance finishes.

    Compliance and approvals
    Clear drawings for planning or permitted development and Building Regulations coordination. Party Wall guidance where applicable and documented inspections.

    Programme, protection, and handover
    Realistic scheduling with live in phasing, dust control, and protection to unaffected areas. Handover pack with manuals, certificates, and care guidance.

    Our Process

    How long will my new build take?
    How long will my new build take? A typical single home runs 8–12 months from breaking ground, depending on complexity and lead times.
    Can you manage planning?
    Can you manage planning? Yes, concept, planning drawings, submissions, and liaison with the local authority.
    Do you work with my architect?
    Do you work with my architect? Happily. We can deliver as main contractor or provide a full design and build service.
    What about warranties?
    What about warranties? We provide manufacturer warranties, statutory certifications, and our workmanship guarantee.
    Finishes
    Finishes Kitchen fit, flooring, bathrooms, tiling, decorations, and exterior works.

    faq

    Do all extensions need planning permission?

    Do all extensions need planning permission?
    Many fall under permitted development; we’ll confirm after a survey.

    How long does a typical extension take?

    How long does a typical extension take?
    10–16 weeks depending on size, structure, and finishes.

    Will the works be messy?
    We isolate the site, manage dust, and keep access clear. You’ll have a named site lead for updates.
    Can you source the kitchen/bathroom?
    Can you source the kitchen/bathroom? Yes, or we’ll coordinate with your chosen supplier.