Lean To Extensions

West Midlands Building Company is the trusted lean-to 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.

Here are some of the types of lean-to extensions we can provide:

Glass lean to extensions
Tiled lean to extensions
Lean to rear extensions
Side lean to extensions
Lean to kitchen extensions
Small lean to extensions

Get in Touch Today

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.

Request a Free Quote

The Process

1. Contact Us

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.

2. Your FREE Consultation & Quote

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.

3. Pick Your Payment Plan

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.

4. Introductions & WhatsApp Group Creation

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.

5. Architectural Drawings & Structural Calculations

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.

6. Project Start Date Issued

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!

7. Project Works Commence

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.

8. Completion, Certifications & Aftercare

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!

Customer Reviews

4.3

170 reviews on

Review us on Google

    
 
 
       Posted on Google  
   
   Marlene Francis 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can honestly say the service that l received from Westmidlands Double Glazing is at a highest  standard. Each step of the project from the start of the consultation to the finish of the built (,single storey organery) as meet my expertise. The team as delivered the most excellent, quality of built which as inhances my family living environment. I also wish to thank Westmidlands Double Glazing team for the support  and handwork in making this dream happen. Thank you Marlene
  
 
      Posted on Google  
   
   Mohamed Moatasem Elsayed 
 
 
 
 Trustindex verifies that the original source of the review is Google. I replaced my conservatory old polycarbonate roof with a new timbered/tiled roof with a full new windows frames and a new bifold door. Great job, efforts and cooperation starting from getting quotation until execution and fitting by Mr Sing who was very dedicated and professional with his associate during the 10 days of work at house.
  
 
      Posted on Google  
   
   P N 
 
 
 
 Trustindex verifies that the original source of the review is Google. Outstanding service and professionalism! Our building work is in the initial stages, as we’ve just completed the brick work, and we have been very impressed with Baj and his apprentice. They have been brilliant, their workmanship has been to a very high standard. So far we have been very impressed with our results and we would definitely recommend Baj and WMG to anyone.
  
 
      Posted on Google  
   
   Daniel Walley 
 
 
 
 Trustindex verifies that the original source of the review is Google. First class service from the sales staff through to the workman carrying out the work. They really go above and beyond to suite the customer. I would definitely use the WMDG again and 100% recommend them. They have turned our run down old conservatory into the perfect living space.
  
 
      Posted on Google  
   
   Lucy Walley 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really pleased with the work and new conservatory roof. The service was very professional and the builders (Mesha and Gurmail) who came to our property were very hard working, on time, professional, tidy and completed a lovely roof for us. Would recommend the company and the builders. Thanks again
  
 
      Posted on Google  
   
   Kelly-leigh Kulyk (Kelly-leigh K) 
 
 
 
 Trustindex verifies that the original source of the review is Google. Back in May we started our extension journey with West Midlands Double Glazing. The aim was to 🌟 knock down our existing conservatory and 🌟 rip out the kitchen. Pav attended to our wishes and dreams and promised our dream space….. he certainly didn’t disappoint. They were not the cheapest company we’d had a quote from but the trust and faith of Pav enabled me to believe I was going to get what I desired. What we had done: ☑️ new patio doors adjoining lounge and extension ☑️ widening of kitchen /extension entrance ☑️ window in kitchen ☑️ new kitchen ☑️ media wall install The team set up a WhatsApp group with all Relevant parties present which enables communication to be easy between everyone involved. I’ve never met such hard working individuals who work from early morning to late at night to get the job done and right! They are also extremely tidy workers not leaving any mess (which was much to my delight) We had some hi cups with the kitchen delivery but Pav and team addressed them On our behalf to enable the stress to be taking out of the process. I would highly recommend this company for anyone’s extension: ✅ pay in instalments each time work is completed e.g plastering, foundations, brick build etc enabling reassurance of not having to lay out all costs with little to show ✅ ease of communication between all parties ✅ quality of the work ✅ customer service every one I have spoken to has been friendly and helpful ✅ they can do everything from flooring, electrics, painting etc so you have no stress to find reliable trades men. ❌ you’ll want more work completed in the future from this company!!! Do not go anywhere else!
  
 
      Posted on Google  
   
   Sean O'Rourke 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had a great experience where WMDG built an extension and internal remodel was finished with a refitted new kitchen. Workmanship was excellent, communication great and whole team are very professional and respectful. Really pleased with the outcome
  
 
      Posted on Google  
   
   Jackie Turner 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had new Georgian bar double glazing windows put in by west midlands double glazing .I'm very happy with them and they worked so hard really pleased thank you

Ready to Start Your Project?

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

Lean To Extensions Designed to Transform Your Home

A lean-to extension is a smart, space-efficient way to extend your home without the upheaval of moving. Designed with a simple, sloping roofline, lean-to extensions are ideal for creating bright, functional spaces that blend seamlessly with your existing property.

Whether you want to enlarge your kitchen, add a relaxed family area or improve the connection between your indoor and outdoor space, a professionally built lean-to extension can transform how your home works for you while adding lasting value.
Professional Lean to Extension Specialists

Choosing the right specialists is essential for a successful lean-to extension. From the initial design consultation through to final completion, we manage every stage of your project. Our structured approach ensures a smooth, efficient build and a lean-to extension that complements your home perfectly.

Experienced Lean to Extension Builders

Our experienced builders have delivered high-quality lean-to extensions across a wide range of property styles. With in-depth knowledge of lean-to construction, roof design, structural integration, and finishes, we ensure every extension is practical, durable and completed to an exceptional standard.

Fully Insured & Accredited Extension Company

For total peace of mind, we are fully insured and accredited. Every lean-to extension we build complies with current building regulations, safety requirements and industry best practices, ensuring a safe, compliant and professionally finished result.

Is a Lean-to Extension Right for Your Home?

Lean-to extensions are a popular choice for homeowners who want to add space while keeping costs, timelines and disruption to a minimum. Their straightforward design makes them suitable for many property types, particularly where space is limited or a simple, effective extension solution is needed.

Benefits of Lean to Extensions

Lean-to extensions provide valuable extra living space while maximising natural light through features such as roof glazing and large doors. They improve the flow between rooms, create a more open feel and offer a practical way to modernise your home without altering its overall character.

Planning Permission & Building Regulations

Many lean-to extensions fall within permitted development rights, meaning planning permission may not be required. We advise you on all planning considerations and handle building regulation compliance, ensuring your lean-to extension meets all legal and technical requirements.

Types of Lean-to Extensions We Build

We design and build bespoke lean-to extensions tailored to your property layout, lifestyle needs, and budget.

Rear Lean-to Extensions

Rear lean-to extensions are ideal for expanding kitchens, dining areas or family spaces. Their simple roof structure allows for excellent natural light and creates a smooth transition between your home and garden.

Side Lean-to Extensions

Side lean-to extensions make effective use of unused side space to create additional rooms or widen existing areas, all while maintaining a balanced and proportionate appearance.