Rear Extensions

West Midlands Building Company is the trusted rear extension builder in Birmingham, the West Midlands and surrounding areas. Unlike other companies, we provide a complete start-to-finish building service, meaning everything is handled under one roof for your convenience.

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Gallery of New Rear Extension Projects

Explore our portfolio of bespoke rear extension projects across Birmingham, the West Midlands and surrounding areas. Every project is designed and built in-house by our expert team, combining exceptional craftsmanship with premium materials.

Why Choose WMBC?

Complete Project Management

We manage everything in-house, including design, build, and finishing touches.

Architectural Drawings & Planning

Our architects handle all drawings, permissions, and regulations for you.

High- Quality Material

We use premium materials sourced directly from our own Builders Merchant for unbeatable value.

10-Year Guarantee

Every project comes with a full decade of aftercare and a workmanship guarantee.

Payment Options & Flexibility

From concept to completion, we handle every stage of your renovation in-house — design, build, installation and aftercare — meaning no third-party contractors and a seamless experience from start to finish.

Flexible Payment Plans

Spread the cost of your renovation through staged payments that align with your project milestones.

0% & Low-Rate Finance Options

Choose from a range of finance plans, including interest-free options on qualifying projects.

Deposit Protection & Secure Payments

Your deposit is fully protected, and all payments are handled safely through trusted, regulated partners.

A Proven Track Record

We have a proven track record of completed projects that are aesthetically beautiful, functional, and energy efficient. We, alongside our sister company West Midlands Double Glazing, have a portfolio unlike any other builder or construction company in the region.

The Process

Fill out a form or give us a call to book in for your FREE consultation where you can tell us all about your renovation needs & requirements, and we can provide our expert advice. If you fill out a contact form on this page, we’ll be in touch within 24 hours.

One of our representatives will come out to see you for your initial consultation where we discuss all of your renovation desires and requirements in detail, and they’ll then return for a secondary consultation once they have designed your home improvements in our 3D modelling software. This allows you to get an extremely realistic idea of how your renovation will look, and give you a chance to provide any feedback or design changes you’d like to implement. 

Choose from the aforementioned payments plans. Whether it be interest, 0% interest or buy now, pay later, we’ll be able to find a flexible plan to meet your budget requirements. 

Once your payment plan has begun, our office team will give you a call to introduce themselves and will set up your dedicated WhatsApp group shortly after. It will include all relevant team members and your assigned Renovation Installation Manager who will serve as your main point of contact throughout the process.

Our architect will then visit the site in order to create the architectural drawings. These drawings are then passed over to our structural engineer who will in turn make the structural calculations based on this. We then submit the architectural drawings and structural calculations to Building Control. Before both get sent off, we will require your sign off giving you a chance to look everything over once more prior to submission. We will also submit the relevant applications to Severn Trent.

Once we have the go ahead from Building Control and, if required, the Planning Department from your local council, as well as any other relevant bodies — your project works start date will be issued! 

Your works will begin and our specialist teams will start to bring your dream renovations into reality. Typically, the works will follow these stages: Foundations, Brickwork, Roof Installation and Completion. Each of our teams are courteous, tidy and consummate professionals who will always show the utmost respect to your property.

After approximately six weeks, your renovations will be completed! At this point in time, we will provide you with the following certifications: Building Control Completion Certificate, Electrical Certificate, Gas Safe Certificate (for any gas works), and a FENSA certificate (for windows and doors). At WMDG, every process is followed to the letter. Just a reminder… we provide a comprehensive 10 year guarantee on all works to give you peace of mind regarding your new renovations for the next decade. Now… you can start your brand new home life! 

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Extension Consultation

Tell us a bit about your project, and one of our specialists will be in touch to discuss design ideas, pricing, and finance options.

Rear Extensions to Transform Your Home and Maximise Space

A rear extension is one of the most effective ways to increase living space, improve the layout and enhance the value of your home. Whether you want a larger kitchen, an open-plan living area or a seamless connection to your garden, our rear extensions are designed to meet your needs and exceed expectations.

Expert Rear Extension Builders

Choosing experienced specialists ensures your rear extension is built safely, efficiently and to the highest standards. We manage every stage of the project, from initial consultation to completion, delivering a stress-free process and exceptional results.

Experienced Rear Extension Specialists

We have extensive experience delivering rear extensions for a wide range of properties. We combine structural expertise, design insight and construction skill to create functional and attractive living spaces.

Fully Insured & Accredited Building Company

For your peace of mind, we are a fully insured and accredited building company. Every rear extension is completed in line with current building regulations and industry best practices, ensuring safety, compliance, and long-lasting quality.

Is a Rear Extension Right for Your Home?

Rear extensions are ideal for homeowners looking to expand their living space without moving. They can create practical, light-filled areas that suit your lifestyle while enhancing the property’s overall value.

Benefits of Rear Extensions

Rear extensions can open up kitchens, dining areas or living rooms, improve natural light, and create a more connected home layout. They offer a cost-effective way to maximise your property’s potential and increase its resale value.

Planning Permission & Building Regulations

Many rear extensions fall under permitted development, but planning permission may still be required in some cases. We guide you through the process and ensure full compliance with building regulations, taking the stress out of approvals and paperwork.

Types of Rear Extensions We Build

We design and build a variety of rear extensions to suit your home, requirements and budget.

Single-Storey Rear Extensions

Single-storey rear extensions are perfect for expanding kitchens or creating open-plan living areas. They are quick to build and seamlessly integrate with your existing property.

Double-Storey Rear Extensions

Double-storey rear extensions provide additional bedrooms or living areas upstairs while expanding the ground floor. They are ideal for families needing maximum space without compromising garden area.

Open-Plan & Kitchen Rear Extensions

Open-plan rear extensions allow you to create modern, spacious living areas with plenty of light. They are ideal for kitchen-dining-living layouts, connecting your home to the garden for indoor-outdoor living.