Converting Your Garage: Convert Garage Door to Window Guide

Thinking about transforming your garage into a more functional and inviting space? Converting your garage door into a window is a fantastic way to let in natural light, enhance the aesthetic, and increase the usability of your garage.

Whether you’re planning to create a cosy home office, an art studio, or an extra living area, this guide will walk you through the process step-by-step. We’ll cover everything from planning and permits to choosing the right window style and installation tips.

Ready to brighten up your space? Let’s get started on converting your garage door into a beautiful new window!

Can I convert my garage into a living space?

Yes, you can.

Few households store cars in their garages because leaving them on the driveway is more convenient when you’re rushing to work or trying to wrangle the kids to school. If you don’t really use the garage for anything other than storage, you can turn it into a haven.

According to Checkatrade, the average garage conversion cost is between £10,000 and £20,000, while home extensions cost between £45,000 and £75,000—but complex projects might exceed £100,000 (MyBuilder).

As you can see, garage conversions are a more affordable way to enhance your living area.

Garage door to window conversion

A garage door to window conversion involves replacing a low-performance garage door with a glazing system. Sliding doors and fixed glass panes are the most popular solutions, as they come with glazing options. They brighten up the space and transform it into an optimal living environment.

What are the benefits of a window garage conversion?

There are numerous benefits associated with turning a garage door into a window and understanding them can help you make the right decision for your needs. Let’s explore them in more detail.

Aesthetic appeal

Garage doors aren’t exactly known to grab attention, but windows often become focal points in a property. For example, modern homes focus on minimalist features and clean lines, but a garage door can ruin the overall design. A contemporary window injects curb appeal.

If you plan on selling your home, a garage conversion project can make your property stand out.

Inject natural light

One of the biggest issues when turning a garage into extra living space is injecting natural light. Most garages are dark, but converting the doors into windows will brighten the space, creating a light-filled interior and enhancing livability.

You can also save money on energy bills by reducing your reliance on artificial lighting and heating, ensuring year-round performance.

Insulation

Double and triple-glazed windows are renowned for their thermal performance. While traditional garage doors lack insulation, installing windows allows for consistent room temperatures.

Glazing will decrease your heating bills if you plan on using the garage as an entertainment room or workshop, contributing to energy efficiency.

Versatility

Whether you have a single or double garage, using it as a storage room means missing out on vital space. There’s so much you can do with these rooms, including transforming them into entertainment spaces with a large-screen TV and games or creating your very own gym.

Let’s not forget that they can also serve as home offices, giving you a peaceful workplace without disruptions.

How to convert your garage door to a window

Garage conversions are usually much easier to manage than a full extension but require some forward planning. Following these steps ensures your conversion goes smoothly without costing too much money.

Step 1: Planning your conversion

Before proceeding with your garage conversion, you’ll need to check whether you need planning permission. These conversions usually fall under permitted development, but it depends on where you’re installing the windows.

For example, adding windows to the front of your garage is usually within building regulations, but side or back windows could compromise the privacy of your neighbours.

The best way to determine whether you need planning permission is by using the government’s Planning Portal or contacting your local authority.

Step 2: The design phase

You’re spending money on a garage conversion, so make sure the windows match your style preferences. Finding the perfect balance between functionality and style means you can match the windows with your home and make a lasting statement.

Here are some great window options that suit garages of all styles and sizes:

Casement windows

If you’re looking for a window design that won’t overshadow the rest of your property, timber casement windows are a great solution. They’re hinged at the side to allow seamless ventilation and come in custom finishes.

A major benefit of casement styles is that they can be used in both contemporary and traditional properties, with custom finishes that match the colour of your other windows.

Sliding windows

If you’re limited on space, sliding windows won’t take up much room while still allowing ventilation. Vertical and horizontal sliding sash windows are timeless in design, but modern technology gives them more security and functionality.

They’re also highly customisable with different sash options available. If you have a traditional home, these windows will blend with the property, adding curb appeal.

Awning windows

If you live in an area that experiences lots of rainfall, awning windows could be a wise investment. Unlike other windows, they have a top-opening mechanism, which means the window creates a slight overhang.

The mechanism allows them to divert rain from the property, protecting your newly converted space. Awning windows are also ideal for high-wind areas and come in a variety of timber finishes.

Bay windows

If you have a large home with plenty of exterior space, adding bay windows could make the ultimate statement. Traditional, dramatic, ultra-durable bay windows instantly grab attention and turn dull garages into focal points.

With their traditional design and panoramic views, bay windows are perfect for country homes. While they can be more expensive, their long-term benefits and style often outweigh the initial investment.

Step 3: The installation process

Unless you’re highly experienced with garage conversions, contacting a professional service is probably best. A converted garage is an investment, and specialist installers will ensure it lasts for years. Here’s how the installation process works:

Removing the garage door

The installation team will remove your door by disconnecting and releasing the opener from the springs. They’ll then remove the tracks and panels. If you do this step alone, get another person to assist, as garage doors can be heavy.

Framing the opening

A professional will then frame an opening for your windows, which could mean they need to reinforce the current opening and install a new wall below the opening. The frame must attach securely to your garage’s structure and ensure it’s level.

Window installation

Now for the exciting part: installing your new windows. The installation company will fit your windows and ensure they’re secure. They might have to remove gaps around the window to ensure your new space maintains consistent temperatures.

Things to consider before converting garage doors to windows

Before your garage conversion, you must consider numerous things, including how you’ll use the space and whether the structure is suitable. Jumping into the process could mean you spend more than you initially planned, but factoring in the following considerations will simplify your conversion.

Structural considerations

If your garage door is part of a load-bearing wall, you’ll need to reinforce the building before beginning any work.

In most cases, you can hire a structural engineer to transfer the load and ensure the existing garage remains durable. Fire safety, including identifying and designating escape routes, is also essential. A professional will draw up the plans and support you throughout the process.

Window materials

The windows you choose will significantly impact the lifespan of your garage conversion. There are three main types of windows: uPVC, aluminium, and timber. Each offers a range of benefits, but there are also some disadvantages to consider.

uPVC windows

The main benefit of uPVC is its affordability. If you’re on a low budget, these windows offer flexibility in terms of style and are a low-maintenance solution. Unfortunately, uPVC isn’t known for its style, and using it for your garage conversion could impact curb appeal.

Aluminium windows

Aluminium windows are gaining popularity, with technological advances enabling property owners to benefit from durability and customisation options. These windows suit modern homes but often look out of place in older properties.

Timber windows

Timber windows are timeless, making them perfect for all architectural styles. Their tendency to rot and warp was off-putting in the past, but technology now enables us to apply treatments to wooden windows, which preserves their beauty but makes them far more durable.

Damp proofing

All buildings are at risk of moisture intrusion, which can result in mould growth and structural damage. Most garage walls use damp-proof membranes, but they might not have the same protection as houses—for example, your damp-proof membrane should be between two layers of bricks.

If you live in a location with heavy rainfall, installing a damp proof course might offer more protection. When moisture penetrates a garage, it can lead to severe mould issues, which compromise your health and often result in expensive repairs.

Insulation

If you plan to use the garage as an additional room, assess whether it has sufficient insulation. There are plenty of insulation products to choose from, the most popular being spray foam insulation, rigid boards, and cavity wall insulation.

It’s also a good idea to use roof insulation to prevent heat from escaping through the ceiling.

Insulation is assessed in terms of a ‘u’ value, which measures the rate of heat escape in watts from a square metre of the material in an hour. Windows and doors should be 0.18 W/m²K. Wooden doors are a good choice in terms of insulation.

Garage type

Garages come in all shapes and sizes, but the position of your garage will define its versatility. Integral garage conversions are usually more affordable, as the garage and house share walls, reducing construction work.

However, most integral garage conversions have limited layout options, which isn’t usually an issue unless you have complex designs in mind.

A detached garage conversion is usually more expensive, but you can let your imagination run wild. On the downside, you might need to apply for planning permission instead of just obtaining a building notice.

Listed properties and conservation areas

While most garage conversions are eligible for permitted development, the rules differ for listed buildings and properties in a conversion area.

For example, conservation areas are protected due to their historic value or natural beauty, meaning property owners can only make renovations that won’t compromise the area. You must obtain listed building consent if you have a listed property and want to convert your garage.

Failing to do this means the local authority could make you reverse the garage conversion or prosecute you.

Enhancing ventilation and natural light

Windows are ideal for attracting natural light, but you’ll want to make sure their positioning maintains a comfortable living environment. Opting for larger is best for shaded garages; adding blinds can prevent excess sunlight.

If you want to ensure maximum ventilation, installing roof lights and lanterns will brighten up the space and provide plenty of air in the warmer months.

Convert your garage door into a window today

Garage door to window conversions give homeowners the opportunity to maximise their living space and save time on selling their property. Better still, when compared to extensions, garage conversions are more affordable and choosing the right windows ensures your new space will last for years.

Windows & Doors UK specialises in creating bespoke timber windows for all your design needs. Our hardwoods are sourced from high-quality sources and come in beautiful styles. Whether you’re looking for traditional sliding sash windows or prefer awning windows, you’ll find everything you need with us.

Please feel free to contact us with any questions or get a free quote from our friendly team today.