More space,
beautifully built.
From rear and side extensions to complete double-storey additions, we design and build high-quality extensions that transform the way you live.
Get a free quotation
"There’s a certain calm that comes from doing things properly. Clean execution, balanced materials, and an attention to detail that doesn’t need to be pointed out. It’s felt, not forced."
“ELMAZ Construction handled our extension brilliantly. The team were organised, tidy and the finished space has completely changed how we use our home.”
“From the first quotation through to completion, everything felt clear and professionally managed. The workmanship on our extension was excellent.”
“We wanted more space without moving, and ELMAZ delivered exactly that. The finish is beautiful and the whole process was smooth from start to finish.”
“The team were reliable, polite and easy to deal with throughout. Our new bathroom extension feels high-end, well built and perfectly suited to the house.”
Over 250 Extensions Built.
"The best in the business."
Stuart
Barnet, EN5
"I highly recommend them."
Elizabeth
Southgate, N14
"Their work is just incredible."
Camilla
Islington, N1
Consultation
Tell us about your extension project, style preferences, budget, and goals. We’ll guide you through the possibilities and answer any questions. If you don't have plans, we'll help you.
Site visit
We visit your property to assess the space, discuss layouts and finishes, take measurements, and provide expert recommendations tailored to your home.
Beautiful build
Our team manages the full renovation from start to finish with high-quality workmanship, clear communication, and meticulous attention to detail.
Clear plans for your dream extension
We help you explore ideas, understand the process, and plan your extension properly before the build begins.
Start your project
1-on-1 advice
Discuss your space, budget, planning requirements and ideal layout with our team before the project begins.
2d design
We help review the best use of your space, from layout and structure to doors, glazing and internal flow.
3d design
Visualise the finished extension clearly, including the kitchen, living space, lighting and overall feel.
Finished project
Sit back while we build your extension with care, precision and proper project management throughout.
Professional and transparent home extensions.
We believe high-quality extensions should feel organised, secure and professionally managed from start to finish.
From clear communication to proper contracts and insurance, every project is handled with care, structure and attention to detail.
Fully insured
ELMAZ Construction carries appropriate insurance coverage, giving you confidence and protection throughout your extension project.
Workmanship guarantee
We take pride in our workmanship and stand behind the quality of our installations, finishes and detailing.
Professional contracts
Every renovation runs under a clear written agreement outlining scope, pricing, payment structure and project expectations.
Extension Gallery
View some of our extension case studies, looking at how we take an extension from the first brick to the finishing touch.
House extension questions
A typical house extension takes around 10 to 16 weeks, depending on its size, complexity and specification. Larger double-storey extensions may take longer.
No. We provide free quotations, allowing you to understand the scope of works, estimated costs and construction process before making any commitment.
Yes. We regularly work alongside architects, structural engineers and building control, helping guide projects through planning, permitted development and Building Regulations where required.
Yes. We undertake the complete project, including groundworks, drainage, brickwork, steel installation, roofing, electrics, plumbing, plastering, decorating and final finishing.
Yes. We normally supply all structural and raw building materials. Finishing items such as kitchens, flooring, lighting and sanitaryware are typically client supplied, although we can assist with sourcing if required.
Absolutely. We can advise where your budget is best spent and tailor the specification accordingly, helping you achieve the best possible result without unnecessary costs.
Yes. Every project is assigned a dedicated project manager who keeps you updated, answers any questions and ensures everything runs smoothly from start to completion.
Yes. We are fully insured and work with experienced, qualified tradespeople to deliver safe, high-quality construction that meets current Building Regulations and industry standards.