ELMAZ Construction

Your extension,
expertly executed.

Bring your ideal extension to life: bespoke design, expertly built with a focus on quality and detail.

Over 250 extensions built.

"Our extension was built to perfection. Very happy."

Jack

Wood Green, N22

"My loft is exactly what we wanted. Spacious and beautiful."

Luis

Winchmore Hill, N21

"Good is an understatement. Spectacular is the word."

Xiani

Hammersmith, W6

Extension Gallery

View some of our extension case studies, looking at how we take an extension from digging to completion.

The process

Understanding Your Extension Journey.

A clear, well-managed extension should feel straightforward from the outset. Here is how a typical extension project moves from first enquiry through to final completion.

01

Consultation & Quotation

We begin by understanding your space, your goals, and the finish you want to achieve. After that, we prepare a clear quotation so you know exactly what is included before any work begins.

Typical timeframe: 1–3 days
02

Planning & Preparation

Once approved, we finalise the finer details, agree materials, confirm the scope of works, and prepare everything needed for a smooth start on site. Extensions require architechtural plans, and these are what we follow.

Typical timeframe: 3–7 days
03

Foundations & Structure

Foundations are mapped out as per the structural drawings and building regulation requirements, and the groundworks begin. Following that, the walls and roof are constructed.

Typical timeframe: 5-6 weeks
04

First Fix & Finishes

This is where the space comes together. First fixing of all electrics and plumbing, followed by boarding and plastering, window installation, and then your finishing works, whether it be simply painting and flooring or kitchen fitting.

Typical timeframe: 4-5 weeks
05

Final Checks & Handover

Before sign-off, we check the finish properly, complete the final details, and make sure everything is left clean, complete, and ready to use, ready for building control sign off.

Typical timeframe: 1 day

Your extension, designed.

Bring your ideal extension to life: bespoke design, 3d rendering, 2d plans.

Extension renovation questions

A typical extension takes around 12 to 14 weeks from start to completion, depending on the size of the space, the specification, and whether any additional works are required.

No. We provide quotations free of charge, so you can understand the likely scope, cost, and approach before making any commitment.

We typically provide the raw building materials needed for the project. Finishing products such as tiles, sanitaryware, brassware, and furniture are usually supplied by the client, although we can assist with sourcing and procurement where needed.

Yes. We can assist with layout ideas, practical planning, and finish selections to help make sure the extension feels cohesive, functional, and well considered before work begins.

Yes. We manage the extension from the foundations through to installation and final finishing, so the process stays straightforward and the quality remains consistent throughout.

Yes. Throughout the project, we work alongside building control inspectors to ensure the works comply with regulations and are properly signed off, whether through a private inspector or the local council.

Yes. We can help shape the scope of works around your budget and advise where best to allocate spend, so the final result still feels well finished and properly considered.

Yes. You will have a dedicated point of contact throughout the project, so communication stays clear and the renovation remains organised from start to finish.