RJK London Design & Build

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RJK London Design & Build RJK London Design & Build specialise in interior design, house extensions and full house renovation.

Ever wondered what it takes to transform three separate rooms into a single, seamless open-plan space in a 4,000 sq. ft....
12/06/2026

Ever wondered what it takes to transform three separate rooms into a single, seamless open-plan space in a 4,000 sq. ft. home? You create the perfect heart of the house—a place where cooking, dining, and everyday life flow together beautifully.

The challenge? It was a complex structural undertaking. We installed three significant indoor foundations, including one measuring 2.5m x 2.5m x 1m to support a 1.5-tonne steel beam, along with 10 steel beams beneath the floor. Managing structural changes inside an existing home is significantly harder than a new build; just maneuvering an 8-meter, 1.5-tonne beam into position is a massive operation.

Thanks to our team’s expertise and resilience, we made it happen flawlessly. The client is thrilled with the new layout and structure.

We’re putting the final touches on this project now—stay tuned for the full reveal of this 4,000 sq. ft. transformation soon!

Last time, we shared a garage conversion project in South London. Today, we’re excited to give you a sneak peek into a r...
18/05/2026

Last time, we shared a garage conversion project in South London. Today, we’re excited to give you a sneak peek into a rear extension and full house renovation project in Sutton, South London!

Beyond handling the extension and structural building work, we completely reimagined and redesigned the entire interior layout. The project is now nearing completion. The team has been working incredibly hard, and while the process hasn't been easy, seeing the results makes it absolutely worth it!

Just like our previous projects, we don’t just change a house structurally—we tailor-make a living space that truly fits our clients' lifestyles.

Everyone has unique habits when it comes to utilizing space, as well as distinct tastes in interior design. To ensure our clients live in absolute comfort, we had countless in-depth discussions with them. From maximizing space and selecting the best materials for their budget, to providing free consultations on furniture and decorative lighting coordination, every single step has been meticulous. We want to ensure that every detail blends perfectly with the overall design and practical functionality.

Both our team and the clients are incredibly excited to see the final reveal! Stay tuned!

Last time, we shared our Design and Build project in Battersea. Today, we’re heading to South London for a Garage Conver...
10/04/2026

Last time, we shared our Design and Build project in Battersea. Today, we’re heading to South London for a Garage Conversion! We handled the architectural drawings and planning application, and the council has officially granted approval. Now, it’s time for the next step!

We don’t often post about the planning side of things, but last year alone, we successfully secured approvals for nearly 10 projects. Our main focus is usually on interior design and construction, so we offer planning services as a low-cost, hassle-free add-on for our clients.

However, "low cost" doesn't mean "standard." Unlike basic planning drawings, we design the interior layout and flow while creating the floor plans. This ensures the extension is perfectly tailored to the client's lifestyle before the first brick is even laid.

Take this garage conversion, for example—one of over 5 we completed last year. In my opinion, it’s the best value-for-money renovation. It’s the most affordable way to add an extra bedroom or ensuite, making it an ideal solution for elderly family members.

We’ve been incredibly busy with new sites lately, so we’re a bit behind on sharing our finished work. Stay tuned—we’ll be posting more project updates very soon!

Following our previous share about a major structural renovation in South London, today we’re highlighting a project rec...
11/03/2026

Following our previous share about a major structural renovation in South London, today we’re highlighting a project recently completed in Battersea, South West London. Located just a stone's throw from Battersea Park, this mid-sized project brought our team immense satisfaction, proving that true impact isn't always about the scale of the build, but the quality of the ex*****on. The client for this project had a very high standard for their quality of life. They weren't looking for a "standard" cookie-cutter construction job; they were seeking genuine design intent and meticulous craftsmanship. From the very beginning, the brief was clear: a space that is modern and elegant, yet retains the warmth and character of a traditional home. Our team at RJK understood the assignment perfectly—when a client has the vision and values quality, we deliver the highest level of output and detail to meet those expectations. The scope covered a full interior refurbishment and a complete garden overhaul. In the kitchen, we paired deep blue cabinetry with natural timber accents, centered around a large island for social living. The bathroom was reimagined using grey stone tones and matte black brassware to create a calm, spa-like sanctuary. Externally, we transformed the garden from the ground up, installing a new patio and horizontal timber slat fencing to turn an aged brick wall into a sleek, modern outdoor retreat. To us, a project is never just about "bricks and mortar"—it is a journey we take alongside our clients. While this wasn't our largest site, the client’s total trust in our expertise allowed us to push our craftsmanship to the limit in every fine detail. We are honored that the client is so pleased with the design and handiwork. Seeing them and their family living comfortably and happily is exactly why we do what we do.

Following our recent project in South London, we’re excited to share the latest milestones from our site in Sutton!We’ve...
12/02/2026

Following our recent project in South London, we’re excited to share the latest milestones from our site in Sutton!

We’ve just installed the box frames and completed the excavation to the required depth. Our Building Control officer has already conducted an inspection and was highly impressed with our construction quality. Today, we successfully poured the foundation concrete, and we’re moving straight into building the cavity walls.

Once the structure is rock solid, the interior transformation begins! At RJK, we don’t just renovate; we provide bespoke design solutions tailored to our clients' lifestyles.

For this home, our clients fell in love with our Contemporary Scandinavian proposal. The palette focuses on warmth and comfort, featuring Mute Green accents for a truly cozy vibe. A standout feature will be the water vapour fireplace in the new extension—a realistic, modern alternative to traditional stoves that adds instant atmosphere.

We can’t wait to see this vision come to life. Stay tuned for more updates!

Last time, we shared a glimpse of a highly detailed engineering project. Today, we’re excited to showcase a new extensio...
15/01/2026

Last time, we shared a glimpse of a highly detailed engineering project. Today, we’re excited to showcase a new extension and full-house renovation currently underway in South London.

We kicked off this project last month and are now working closely with our client to refine the design—optimizing the space for maximum comfort and perfecting the electrical layouts. We are truly grateful for the trust our clients place in us.

While we’ve been busy completing several extensions, conversions, and interior design projects over the past few months, we’ve been a bit quiet on social media! We’re finally catching our breath to share some updates. Take a look at these latest site photos and design concepts for our South London project.

Last time, we shared a garden project. This time, we’d like to share another project located in Battersea. Unlike our us...
12/11/2025

Last time, we shared a garden project. This time, we’d like to share another project located in Battersea. Unlike our usual large-scale extension or construction works, this one is a very refined and detailed project.

It’s a full-house renovation covering the garden, kitchen, bathroom, painting, and flooring works. The project is expected to be completed in mid-November. The client hopes to achieve high-quality workmanship and good design yet keeping the cost down.

Our team is doing our best to meet the client’s expectations. The bathroom now looks modern and cozy — exactly the style the client envisioned.

We’ll soon share the rest of the areas — stay tuned!

Last time, we shared a large-scale extension project in South East London that took two years to complete and is now fin...
27/10/2025

Last time, we shared a large-scale extension project in South East London that took two years to complete and is now finished.

Many people might think we mainly focus on interior design, planning applications, and renovation works—but actually, we’re also very good at garden design.

This project is located in Battersea, featuring a very old garden with lots of plants and traditional red brick walls. We came up with a new idea to completely transform the garden into a modern and neat style.

At the same time, we’ve also been handling the interior refurbishment for the client, which is now nearly completed. Both we and the client are very excited to see the final result!

Last time, we shared a project in South London that involved extensive structural work. Today, I’d like to share another...
02/10/2025

Last time, we shared a project in South London that involved extensive structural work. Today, I’d like to share another project located in Southeast London, which has just been completed after two years of hard work.

From the very beginning — including the planning application — our team handled everything. We transformed an original 2,200 sq.ft. detached house into a stunning 3,600 sq.ft. home. This project came with many different challenges, but thanks to our team’s experience and coordination, we were able to overcome them one by one.

The scope covered a wide range of works: a large rear extension, a double-storey side extension, full interior design and refurbishment, underfloor heating, a complete ventilation system, full rewiring and repiping, as well as a brand-new driveway and landscaped garden.

The client had very high expectations and was clear from the start: “We want the best design and construction.” At RJK, our answer was equally clear: “With the right budget, scale, and vision, we’ll deliver the very best outcome.” And that’s exactly what we did.

This was a large-scale project with certain detailed features that required extra budget allocation. The client was very cooperative and appreciated our transparent explanations on how each cost was applied and the effect it would bring. Throughout the process, we maintained strong communication, and the client placed great trust in our professionalism. This trust was crucial, as large projects often take time and come with unexpected challenges that can only be solved effectively through good communication.

In the end, we’re honoured that the client is delighted with the results and is now living comfortably and securely in their new home.

For us, this project was not just about construction — it was a two-year journey of mutual trust. The client trusted us, and we delivered with our expertise and commitment.

Last time, we shared two garage conversion projects—one in Kingston and the other in Bromley. This time, I’d like to giv...
29/08/2025

Last time, we shared two garage conversion projects—one in Kingston and the other in Bromley. This time, I’d like to give everyone an update on the 4,000 sq ft site we previously mentioned. This project isn’t an extension, but in terms of structural work, it’s actually more challenging than many large-scale extensions.

In total, we had to install seven steel beams to create a large open area. The largest steel beam alone weighs nearly 2 tons. The biggest foundation is in the living room, measuring 2.5m × 2.5m × 1m deep, and it uses C40-grade concrete (while standard structures usually only require C25). We had to use more than 30 props and strongboys to support the load-bearing walls and roof.

To be honest, although our team has completed many extension projects and has rich experience in house extensions, this project has still been a big challenge for us. The scale of the structural modifications is immense, and with older houses, structural alterations are always more complicated than starting from scratch because we must consider the existing structure.

We’ve now completed the foundation and temporary supports and are preparing to install the steel beams this week.

Through this structural renovation project, we want to show that UK houses can actually be very flexible when it comes to modifications. The key is to have a structural engineer properly calculate everything, and then carefully follow the plan during ex*****on. That way, you’ll end up with a safe and comfortable home.

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Kingston Upon Thames
KT26QL

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Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 9am - 5pm

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