Side Extensions

West Midlands Building Company is the trusted side 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 Side Extension Projects

Explore our portfolio of bespoke side 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.

Side Extensions to Maximise Your Home’s Space & Potential

A side extension is a practical and stylish way to add more space to your home without the need to move. Whether you’re looking to expand your kitchen, create a larger living area or improve the flow of your home, our side extensions are designed to enhance both functionality and value.

Professional Side Extension Specialists

Choosing experienced specialists ensures your side extension is built safely, efficiently and to the highest standards. We manage the entire project from design through to completion, delivering a stress-free experience and exceptional results.

Experienced Side Extension Builders

We have years of experience delivering high-quality side extensions and side return extensions. We understand structural requirements, planning permissions and design integration to create seamless, functional living spaces.

Fully Insured & Accredited Extension Company

For your peace of mind, we are a fully insured and accredited extension company. All work is carried out in line with current building regulations and industry best practices, ensuring your side extension is safe, compliant and built to last.

Is a Side Return Extension Right for Your Home?

Side return extensions are an excellent option for homes with narrow side alleys or unused spaces. They are perfect for adding additional rooms or enlarging existing spaces without affecting the garden area.

Benefits of Side Return Extensions

A side return extension increases usable space while maintaining the property’s external footprint. It can create open-plan kitchens, dining areas or utility rooms, improving natural light and functionality throughout the home.

Planning Permission & Building Regulations

Many side return extensions can be built under permitted development rules, but we guide you through planning and building regulations to ensure your project is fully compliant. Our team handles the necessary approvals and paperwork, making the process simple.

Types of Side Extensions We Build

We offer a range of side extension options to suit your home layout, lifestyle and budget.

Standard Side Extensions

Standard side extensions expand your home’s footprint to create additional rooms or larger living areas. We design them to blend seamlessly with your existing property.

Side Return Extensions

Side return extensions make use of narrow spaces along the side of your property. They are ideal for opening up kitchens, creating additional living spaces or extending hallways for better flow.

Wrap-Around Side Extensions

Wrap-around side extensions combine rear and side extensions for maximum space. Perfect for homeowners seeking substantial ground-floor transformations, they deliver both practicality and modern open-plan layouts.