Precision & Quality · South London

Your trusted construction company focussed on precision and quality.

At GP Construction, we bring your vision to life with expert craftsmanship and a commitment to quality. Based in South London, we specialise in loft conversions, home extensions, refurbishments, new builds, garden rooms, kitchens, bathrooms and shop refits.

From the first site visit to the final clean, you deal with the same team throughout, so you always know who is on site, what happens next and when it will be finished.

What We Do

Everything you need, in one place

Eight core services, all delivered by the same team, from a single bathroom to a full new build.

Our Work

Recent projects

A selection of recently completed work across South London. See the full gallery for more.

View the full gallery

Testimonials

What clients say

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★★★★★

My husband and I purchased our first family home in 2021, knowing that we had a lot of work ahead of us. We were fortunate to find GP Construction, who made the entire process smooth and rewarding. From the start, Grant provided us with valuable advice on how to maximize our space and suggested ways to create even more room where possible.

We decided to add a small rear extension to give us a spacious kitchen and also to complete a loft conversion, which now includes a beautiful bedroom, a walk-in wardrobe, and a lovely en-suite. The GP Construction team worked tirelessly throughout the project, and their attention to detail was outstanding. We held weekly meetings to review progress and make any necessary adjustments.

We are extremely happy with the service we've received from GP Construction, and we look forward to collaborating again in the near future!

Sam CRear extension & loft conversion
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★★★★★

In 2024 we started the downstairs renovations journey for our 1920's terrace property in South London.

To say we were beyond lucky to have Grant and his team from GP Construction come and transform our house from 50 shades of grey to my Art Deco/Modern Contemporary vision is a understatement and our house is a true testament to Grant and his teams commitment to top notch craftsmanship, reliability and amazing work ethic.

Would I use him again - “Abso-fing-loutely”! I would have him back in a heart beat.

Tania WalkerGround floor renovation · Addiscombe
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★★★★★

Grant helped me feel comfortable and brave when making one of the biggest financial investments that I will make in my home.

He encouraged me to make my own choices and gave me helpful insight when considering options. During the instal he was trustworthy and punctual and left my house tidy enough that me and my children could use some of the downstairs. The timescales were stuck too and any delays explained. Grant worked with tradesmen I had chosen and orchestrated work well. The finish was good and I love the final outcome.

Rhiannon FenemoreHome renovation · Shirley
Questions

Frequently asked questions

What areas of South London does GP Construction cover?

We work across South London and the surrounding areas, including Croydon, Streatham, Bromley, Dulwich, Clapham and Wandsworth, along with the neighbouring boroughs. If you are just outside those areas it is still worth asking.

Do you provide free estimates?

Yes. We visit the property, talk through what you want to achieve and what is realistic, then send a clear, itemised written estimate. There is no charge and no obligation.

What services do you offer?

Loft conversions, house extensions, refurbishments, new builds, garden rooms, kitchens, bathrooms and shop refits. Because we cover all of them, a project that starts as an extension and grows into a wider remodel stays with one team rather than being split between contractors.

Do you handle planning permission and building regulations?

Yes. We establish whether your project falls under permitted development or needs a full application, work to the approved drawings, and arrange building control inspections so the finished work is properly certified.

Are you insured?

Yes, we carry public liability insurance and will provide the certificate on request before work starts.

How do I get started?

Call 020 3478 9174 or send us the details of your project through the contact form. We will arrange a visit, usually within a few days, and take it from there.

Free Estimate

Let's plan your project with confidence

Tell us what you have in mind and we'll arrange a visit, talk through the options and put together a clear, itemised estimate, free and with no obligation. Whether it's a single room or a full build, we're happy to advise.