Loft Conversions | South West London

    Loft Conversions South West London

    Specialist loft conversions across SW London. Dormer, mansard, Velux and hip-to-gable. Fixed-price quotes after a site visit, one team throughout, and no deposit required.

    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.

    Our expertise

    Specialist loft conversion builders for SW London homes

    Transform your unused loft space into a beautiful, functional room. Expert craftsmanship, transparent pricing, and seamless project delivery.

    Dormer, mansard, L-shaped, hip-to-gable and Velux conversions. We understand the structural nuances and planning requirements of South West London's period homes.

    Every project is managed by our own team, with one point of contact, weekly updates, and a fixed-price quote after a site visit, so you know the cost before we start.

    New stairwell and rooflight in a completed South West London loft conversion
    New staircase and rooflight details from completed Bluebird Spaces loft work. View completed projects.
    Bright loft landing with new balustrade, doors and rooflight
    Finished loft landing with natural light and a new balustrade.
    Options

    Types of loft conversion

    Velux / Rooflight

    The most cost-effective option. Works within your existing roof structure, adding high-quality Velux or similar roof windows for natural light without altering the roofline.

    Rear Dormer

    Most popular

    Our most popular option. Extends the rear roof slope to create full standing headroom — typically large enough for a master bedroom with en-suite bathroom.

    L-Shaped Dormer

    Perfect for Victorian terraces with a rear outrigger. Extends across both the main roof and the addition below.

    Hip-to-Gable + Dormer

    Ideal for semi-detached and detached homes. Extends the sloping side of the roof into a vertical gable wall.

    Mansard Conversion

    The premium option. Restructures the entire rear roof slope to near-vertical, creating maximum internal volume — effectively a full extra floor.

    Finished en-suite shower room within a Bluebird Spaces loft conversion
    A completed loft en-suite with tiled shower, sanitaryware and fitted lighting. Explore Wandsworth loft conversions.
    Included

    What's included in our loft conversions

    Structural Work

    Steel beam installation, roof structure modifications, floor reinforcement, dormer or Velux windows

    Staircase & Access

    Building regulations compliant staircase, fire escape provisions, landing modifications, handrails and balustrades

    Insulation & Finishes

    High-performance insulation, plasterboard and skimming, decoration ready finish, flooring installation

    Services & Compliance

    Electrical installation, heating extension, work built to building regulations (Building Control and structural engineer fees quoted separately)

    How a loft conversion works

    01

    Free site visit and feasibility

    We visit, measure up, assess the roof structure, check head height and identify any structural constraints. You get honest advice on what is achievable and the practical next steps.

    No obligationFreeSame day feedback

    What our clients say

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

    "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

    "Tom, Milen & Ben at Bluebird Spaces, 100% delivered on constructing our ground floor extension. The project came out on time, on budget and with customer happiness as their ultimate goal."

    Dan & Maddy

    Sheen

    "Ben and Tom are just finishing a complete refurbishment of my two bedroom flat in Chelsea. They are a joy to work with. Responsive, helpful and always wanting me to get the best possible result. I recommend them wholeheartedly."

    Barry Lynch

    Chelsea · Google review

    "We worked with Bluebird on our kitchen extension project. Highly recommend. They were transparent, easy to work with, had top tradesmen who care about delivering a good build."

    Alex Ng

    Wandsworth · Google review

    "They were knowledgeable and explained each part of the process in terms that I could understand. All the workers are friendly, clean up after themselves every day. I would wholeheartedly recommend them."

    Jane Farrelly-Ward

    Richmond · Google review

    "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

    Fulham

    "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

    "We simply couldn't recommend Ben, Tom and Milen enough. The team was amazing for the duration of our ground floor project, which involved gutting and reconfiguring the lounge, kitchen and utility room."

    Andrew Cork

    Google review

    "We used Ben and his team to completely refurbish our house as well as create a new en suite bathroom. Being an older house we had several unexpected issues but Bluebird Spaces managed to still get everything finished on time…"

    Verena Peternell

    Google review

    FAQ

    Frequently asked questions

    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.

    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.

    A well-designed loft conversion can add useful living space and improve a home's value, but the result depends on the property, layout, finish and local market. We focus first on creating space that works well for the household.

    Most lofts can be converted if there's sufficient head height (typically 2.2m at the ridge). Victorian and Edwardian terraces across SW London are ideal candidates. At our free site visit we check head height, inspect the roof structure and recommend the best conversion type for your property, then give you a fixed-price quote.
    Get Started

    Ready to talk about your project?

    Free consultation. Clear, itemised quote. No deposit upfront.