About Us

Where Engineering Meets Inspired Design

Transforming your home is more than just a project. It's a personal journey — and we're here to make every step feel effortless, exciting, and entirely tailored to you.

At GK Developers, we specialise in beautifully crafted extensions that bring space, light, and new life into your home. But what truly sets us apart is how we build. We're a full-service design and build company, offering in-house structural engineering, project management, and interior design so you get clarity, speed, and quality from start to finish, all in one place.

With over a decade of combined experience in high-end residential construction and interior design, our team delivers every project with precision, creativity, and care. We treat your home as if it were our own — and we take pride in getting every detail right.

At GK Developers, we don't just build — we transform spaces into homes you'll love living in.

Services Offered

House Extension

  • Rear, Side, Wraparound & double storey extensions
  • Modern open-plan kitchen-diners
  • Seamless integration with existing property
  • Full planning, design & construction handled in-house

Design & Build

  • In-house architectural drawings
  • Structural calculations by our chartered engineer
  • Interior layout and finishes guided by our design team
  • End-to-end project delivery under one roof

Loft Conversions

  • Dormer, hip-to-gable, and mansard conversions
  • Maximise unused attic space
  • Planning, design and construction
  • Fully compliant with building regulations

Full Renovations

  • Strip-outs, reconfigurations, full refurbishments
  • Kitchens, bathrooms, flooring & finishes
  • M&E upgrades (plumbing & Electrics)
  • Ideal for investors and homeowners alike

Landscaping & Outdoor Spaces

  • Patios, decking, and garden rooms
  • Outdoor kitchens and entertainment areas
  • Driveways and fencing solutions
  • Designed to complement your property and lifestyle

New Build Homes

  • One-off bespoke homes
  • Turnkey construction from groundworks to handover
  • Planning submissions, bespoke structural designs and building control
  • Built to your exact lifestyle needs and energy performance goals
Modern house extension with contemporary loft conversion and bi-fold doors opening to garden
Traditional brick house with modern ground floor extension featuring large glass sliding doors and open-plan kitchen living space

Meet Your Team

GK Developers team members working together on a construction project

Deluxson Gnanasambanthan (BEng, SMSTS)

Co-Founder

A degree-qualified Civil Engineer (BEng, SMSTS) with over 7 years' experience in high-end residential high-rise projects, Deluxson brings precision, technical expertise, and a deep understanding of construction best practice to every build. Known for his problem-solving skills and attention to detail, he ensures each project is delivered on time, on budget, and to the highest quality.

Janaranjan Kamalanathan (BA)

Co-Founder

With a background in interior-led project management, Jana has a talent for turning spaces into stylish, functional homes. His focus on layout flow, finishes, and client lifestyle needs ensures every GK Developers build is both practical and beautiful. Jana works closely with clients to bring your vision to life while maximising space and light.

Jacob Richardson (MEng, CEng)

Structural Engineer

An experienced Chartered Structural Engineer (CEng) with a background at ARUP, Jacob has worked on some of the UK's most recognisable landmark projects. His world-class engineering expertise ensures GK Developers' builds are structurally flawless, safe, and future-proof — combining innovation with uncompromising quality.

Project Timeline

GK Developers project timeline showing stages from initial consultation to completion

Standards & Guarantees

At GK Developers, we hold ourselves to the highest standards — because your home deserves nothing less. Our promise is to deliver every project with professionalism, integrity, and a finish that speaks for itself. Here's what you can expect from us:

Structural Integrity, Guaranteed

Every project is reviewed and signed off by our in-house Chartered Structural Engineer, ensuring all works meet the latest building regulations and structural safety standards. We don't just build to code — we build to last.

12-Month Workmanship Guarantee

We stand behind our craftsmanship. That's why we offer a 12-month snagging and workmanship guarantee on all standard builds. If something isn't right, we'll return and make it right — no stress, no excuses.

Fully Insured & Compliant

We are fully covered with:

  • Public Liability Insurance
  • Employers' Liability Insurance
  • Contractors' All Risk Insurance

This means you're protected at every stage of the build.

Strict Quality Control

Every stage of your project is signed off through a multi-point inspection process — from foundation to final finish. We monitor quality on-site daily, and keep a close eye on detail so nothing gets missed.

Health & Safety First

Safety is non-negotiable. Our team is SMSTS-certified, follows site-specific risk assessments, and upholds a zero-compromise approach to health and safety for your family and our workforce.

Next Steps

Contact GK Developers for house extension and renovation quotes

If you would like to proceed, please get in touch using one of the following platforms to book in a site visit and a personalised quote.

Phone: +447389 034 063 Website: www.gkdevelopers.co.uk Email: enquiries@gkdevelopers.co.uk Instagram: @gkdevelopersuk