House Extensions South West London

    Create the space you need with a beautifully designed house extension. Expert craftsmanship, seamless integration, and exceptional results.

    Call 07564 041115Get a Quote

    Why Choose Bluebird Spaces for Your Extension

    Add Significant Value

    Extensions can add 15-25% to your property value with the right design

    12-16 Week Build

    Efficient project management ensures timely completion

    Design Excellence

    Thoughtful designs that maximize light and space

    FMB Accredited

    Certified Federation of Master Builders member

    Types of House Extensions

    Side Return Extension

    From £45,000

    Perfect for Victorian and Edwardian terraces. Reclaim wasted side passage space and create an open-plan kitchen-diner.

    • Typically 3-4m x 6m (18-24m²)
    • Often permitted development
    • Transforms narrow kitchens
    • 10-12 week build time
    Most Popular

    Single-Storey Rear Extension

    From £65,000

    The classic extension. Extends into your garden to create a spacious kitchen-dining area with bi-fold or sliding doors.

    • Typically extends 3-6m from house
    • Permitted development (usually up to 6m for terraced)
    • Floods space with natural light
    • 12-14 week build time

    Wraparound Extension

    From £95,000

    Combines side return and rear extension for maximum space. Creates impressive open-plan living areas.

    • Typically adds 40-60m²
    • May require planning permission
    • Transforms entire ground floor
    • 14-18 week build time

    What's Included in Our Extensions

    Structural Work

    • Full foundations and groundwork
    • Steel beam installation
    • Brickwork and masonry
    • Roof structure and tiling

    Windows & Doors

    • Bi-fold or sliding doors
    • Roof windows or lanterns
    • High-performance double glazing
    • External door frames

    Internal Finishes

    • Plastering and decoration
    • Flooring installation
    • Skirting and architraves
    • Kitchen fit-out ready

    Services & Compliance

    • Full electrical installation
    • Plumbing and heating
    • Building regulations approval
    • Structural engineer's design

    Detailed Pricing Guide

    Extension Costs by Type and Size

    Side Return Extension (18-24m²)

    Standard specification

    £45,000 - £58,000

    Single-Storey Rear (25-35m²)

    Extending 4-5m with bi-folds

    £65,000 - £85,000

    Single-Storey Rear (40-50m²)

    Extending 6m+ with roof lantern

    £85,000 - £115,000

    Wraparound Extension (50-70m²)

    Combined side return and rear

    £95,000 - £140,000

    Additional Costs to Consider:

    • Kitchen supply & fit: £15,000 - £40,000
    • Party Wall Agreement: £700 - £1,500 per neighbour
    • Planning permission: £350 - £1,200 (if required)
    • Premium finishes: 15-25% additional cost

    Note: All prices include VAT, building regulations, and structural engineer. Fixed price guaranteed.

    How a house extension works

    01

    Free site visit and feasibility

    We assess your garden, existing structure, drainage runs and any party wall implications. We advise on single storey, double storey or wraparound options and give a realistic budget range before any fees are paid.

    No obligationFreeBudget range same day

    What our clients say

    Don't just take our word for it — hear from homeowners across SW London

    "Tom was brilliant throughout the whole build process. It was a pleasure to be asked for a website review, after all they did for us. We are truly grateful to the whole team for the level of quality and for continually going the extra mile."

    Rowan A

    Wandsworth

    "Bluebird was recommended to me by our local estate agent. Lovely guys and so pleased decided to go with them. Tom, Milen and the team on site were so professional and couldn't have been more helpful. Very happy clients."

    Emma and Tom

    Richmond

    "The first project we trusted Tom and Milen with was a house conversion into 4 flats. We didn't know it at the time, but using Bluebird for such a big project was the best decision we have made. They are our first call when we find another development."

    Tony and Rhys

    Putney

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    Get Started

    Ready to talk about your project?

    Free consultation. Transparent, fixed-price quote within 48 hours.

    Reach Out07564 041115