Double Storey Extensions

West Midlands Building Company is the trusted double storey 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 Double Storey Extension Projects

Explore our portfolio of bespoke double storey 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.

Double Storey Extensions Designed to Add Space & Value to Your Home

A double storey extension is one of the most effective ways to significantly increase living space while enhancing the value of your property. Whether you’re expanding your ground floor, adding bedrooms or reconfiguring your layout, our expertly built double storey extensions deliver practical, long-lasting results.

Professional Double Storey Extension Specialists

A successful double storey extension requires careful planning, skilled workmanship and experienced project management. We manage the entire process from concept to completion, ensuring a smooth build and a high-quality finish.

Experienced Double Storey Extension Builders

We have extensive experience delivering double storey extensions across a wide range of property types. With expert knowledge of structural work, design integration and construction standards, we ensure every extension is safe, durable and built to last.

Fully Insured & Accredited Extension Company

For complete peace of mind, we are a fully insured and accredited extension company. All single storey extensions are carried out in line with current building regulations, safety standards and industry best practices.

Is a Double Storey Extension Right for Your Property?

Double storey extensions are ideal for homeowners who need additional space but want to maintain outdoor areas. They allow you to maximise your property’s footprint while creating a balanced and functional layout across two levels.

Benefits of Double Storey Extensions

A double storey extension can provide extra bedrooms, bathrooms and living areas without compromising garden space. They often offer better value per square metre compared to single storey extensions and can significantly increase property value.

Planning Permission & Building Regulations

Double storey extensions usually require planning permission. We guide you through the planning process, liaise with relevant authorities where required and ensure full compliance with building regulations throughout the build.

Types of Double Storey Extensions We Build

We design and build a range of double storey extensions to suit your property style, layout and long-term needs.

Rear Double Storey Extensions

Rear double storey extensions are ideal for expanding both ground-floor living areas and upstairs bedrooms. They provide a practical way to add space while maintaining the character of your home.

Side Double Storey Extensions

Side double storey extensions are perfect for properties with unused side space. They allow for wider rooms, additional bedrooms, or new stair layouts, enhancing both space and functiona

Wrap-Around Double Storey Extensions

Wrap-around double storey extensions combine rear and side extensions to deliver a complete transformation. They are ideal for homeowners seeking a substantial increase in living space and a modern, open-plan layout.