Design-led construction across South West & West London

    Extensions, Loft Conversions & Renovations in South West & West London

    Considered residential building projects, managed from first survey to final handover.

    No deposits. Only pay for completed work.

    No deposit

    You only pay for work that's completed, valued week by week.

    Guaranteed work

    All work is guaranteed for complete peace of mind.

    Vetted & managed trades

    Our trusted team is managed directly by us.

    Always in touch

    Your project manager keeps you updated every step of the way.

    Honest advice

    We'll always give you straight advice and advise if savings can be made.

    Tom and Milen, founders of Bluebird Spaces, at a London construction project
    About us

    Tom and Milen.

    We met in South West London over ten years ago, each working in residential construction.

    We kept running into the same problem: homeowners getting vague quotes, watching budgets creep, and dealing with builders who disappeared mid-job. So we set up Bluebird Spaces to do it differently.

    Every project gets one team, one point of contact, and a fixed-price quote after a site visit, before we lift a finger. No shortcuts. No inflated promises. Just work we're happy to put our names to.

    FMB members
    Fully insured
    Fixed-price quote after site visit
    What our clients say

    What our clients say

    "Ben, Tom and Milen are just brilliant. Not only were these guys and their team knowledgeable, hard working and great at communicating but they also pointed out issues that we had not thought of. Every aspect of the work has been carried out to a very high standard."

    Clemmie and Jack

    Chiswick · Google review

    "Ben is a fantastic project manager, he doesn't pass any stress onto his clients. Tom is amazing — everything is possible according to Tom. The end result is phenomenal."

    Sophie Weston

    Clapham · Google review

    "Absolutely brilliant firm. Hired them for a loft conversion. Really professional, great build quality, high quality finish. Great communication throughout. We are thrilled with the result and would hire them again in a heartbeat"

    Peter Hughes

    Google review

    How we work

    A clear process from first call to final handover.

    Five stages. Each one with a defined output, a fixed timeline, and a single point of contact.

    01

    Initial call

    A short conversation to understand what you're hoping to achieve and confirm we're a good fit.

    02

    Site visit and brief

    We come to your property, walk through the space with you, and write up a clear brief.

    03

    Fixed-price quote

    A fully itemised fixed-price quotation after the site visit, reviewed with you in person before anything is signed.

    04

    Build

    Our team manages the project from setup to completion. Daily updates via your client platform.

    05

    Handover and aftercare

    Final walkthrough, snagging, and a six-week aftercare visit once you're back in your home.

    Where we work

    Renovations across South West and West London.

    We focus on London's premium residential postcodes — the areas where in-house project management makes the biggest difference.

    Also covering Putney, Holland Park, Earlsfield, Southfields, St John's Wood, Maida Vale, and Mayfair.

    FAQ

    Frequently asked questions

    A typical rear dormer loft conversion takes 8–12 weeks from start to completion. Velux conversions can be faster at 6–8 weeks, while mansard and L-shaped conversions may take 10–14 weeks depending on complexity. We provide a detailed programme before work begins.

    Most rear dormer and hip-to-gable conversions fall under Permitted Development and don't require planning permission. However, mansard conversions always require planning approval, and properties in conservation areas may have restricted PD rights. We assess your planning position for free before you commit.

    We work across SW and West London including Clapham, Wandsworth, Battersea, Putney, Wimbledon, Fulham, Richmond and Earlsfield.

    We give a fully itemised fixed-price quote after a site visit, before any work begins. If the scope changes, we price the change and agree it with you before it goes ahead.
    Get in touch

    Ready to talk about your project?

    Free site visit, then a fixed-price quote. No obligation.