At APT Renovation Design + Build, we pride ourselves on providing original and creative design solutions, an integrated design process, eco-friendly building materials and technologies, high quality craftsmanship, and above all, extraordinary customer service.

Explore how we can improve your existing living space.

Design & Build

design and build specialist london

Basement Conversions

basement conversion london

House Extensions



house renovation london

Loft Conversions

loft conversion london

Chat to our team today or arrange a free no obligation Site Visit at your property

APT Renovation Ltd – Design & Build

By choosing APT Renovation, you will be safe in the knowledge that our first-class architectural designers, interior designers and builders will be able to cover every facet of your vision for your dream home, and greatly exceed your expectations. Not only will you be able to relax knowing that your ideal home will be created to the highest standard achievable, we always make sure it’s done within the letter of the law, meaning that you will have peace of mind. From our first consultation through to the final completion and handover of house extension, basement conversion and house renovation projects, you will have the luxury of a team of builders and design & build architectural designers that’s totally dedicated to your success.

Here at APT Renovation, we like to think that we are very different to the usual run of London builders. That’s partly down to the fact that we are one of the very few firms who choose not to ask for deposits or upfront payments. We get work started for you (including scaffolding, skips and purchase of materials), and you only begin any payments to us once we are underway and you are happy with the progress so far.

Our team will be at hand for you every step of the way to ensure that your project runs smoothly, and in the way that you envisioned – offering full transparency in the process. The happiness of our customers is of paramount importance to us, which is why pride ourselves in bespoke customer care, and attention to all the fine details.

We are happy to work on projects in Chelsea, Fulham, Clapham, Wimbledon and South Kensington from as little as £50,000 and are able to provide a full service for jobs right up to £1m. We also offer a comprehensive architectural design and visualisation service.

Please contact us with any questions you might have. Call us today on 0207 223 6417 to talk about your plans and your vision for your home.

Why choose us?

In house experts

architectural designer, designer, project manager, structural engineer and full construction team all under one roof for an all inclusive on service.


A fast seamless planning, design and construction process with immediate start of project when you are ready

No Upfront Payment

You only start payments to us
once we are under way and
you are happy with the progress so far

15 Year Warranty*

APT Renovation will guarantee 15 years warranty on structural work carried by us.

Clients feedback

APT Renovation team are always happy to hear your thoughts about your project, either on the phone or in person.

If you’d like to know more please arrange a FREE no obligation site meeting you.

Call Us: 0207 223 6417

Email Us:

Office Opening Hours

Mon        08:00 – 17:00
Tue         08:00 – 17:00
Wed        08:00 – 17:00
Thu         08:00 – 17:00
Fri           08:00 – 17:00

Outside of these hours, please leave a message and we will call you straight back.

If you are an existing client and need to contact us urgently, please call the mobile number of your Project Manager

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Our Awards / Partners

APT Renovation Design & Build basement conversion builders based in South West London provides residential services for homes and property.  Our services includes basement excavation, design, construction, basement waterproofing and fit-out. If you are planning to renovate your existing basement space or would like to create new basement conversion under your property or garden into cosy living space such as children playground, study room, guest bedroom, extra bathroom or even sauna and gym, Our architectural designers and builders has extensive experience and skill set to replicate your vision into outstanding underground basement for you.

London Basement Company | Basement Conversions London | Basement Construction | Basement Designs

Chelsea | Fulham | Clapham | Wimbledon | Battersea | Knightsbridge | Marble Arch