Thinking about how to create more space at home, but not sure whether a garage conversion or a residential extension is the better move? Picture an extra room for work, family, or storage, but then comes the reality: What’s the cost? How long will it take? Will it add value?
You’re not alone in weighing up time, budget, and long-term benefit, as it’s a common challenge for homeowners across the UK. In this guide, Viewscape Construction will break down the pros and cons of both options, helping you understand factors like garage conversion cost versus residential extensions costs - and how we can help you make the right call for your home.
What is a Garage Conversion?
A garage conversion involves transforming an existing garage into a liveable space within your home. It’s a smart way to add useful square footage without altering the property’s footprint. Many homeowners choose to convert their garage into an extra bedroom, home office, gym, playroom, or even a self-contained rental unit.
The cost of converting a garage typically ranges from £10,000 to £25,000, depending on size, layout, and finish. This makes it one of the more cost-effective renovation options available.
In many cases, a garage conversion falls under permitted development, meaning full planning permission isn’t required. However, it’s always best to check with your local authority before starting.
Pros of a Garage Conversion
- More affordable than an extension
- Less disruption to daily life
- Quicker to complete (usually within a few weeks)
- No loss of garden space
Cons of a Garage Conversion
- May reduce storage space
- Limited size (dependent on garage dimensions)
- Potential planning restrictions in certain areas
What is a Home Extension?
A home extension involves building additional space onto your existing property, either at the rear, side, or even upwards. Common types include rear extensions, side returns, wraparounds, and loft conversions. These projects are ideal for if you’re a family needing more space or looking at adding value to your home.
The average house extension cost in the UK ranges from £1,800 to £3,000 per square metre, depending on design, materials, and complexity. Planning permission is often required, especially for larger or two-storey residential extensions, so it’s important to factor in approval time.
Pros of a Home Extension
- Adds significant value to the property
- More customisation options
- Can create open-plan living spaces
- Ideal for long-term investment
Cons of a Home Extension
- More Expensive Than a Garage Conversion
- Longer Construction Time
- May Require Planning Permission
- Potential Loss of Garden Space
Cost Comparison - Garage Conversion vs. Home Extension
When comparing a home extension vs garage conversion, cost is one of the biggest deciding factors. A typical garage conversion cost ranges from £625 to £1,250 per square metre, making it a more affordable option for many homeowners. In contrast, a standard home extension falls between £1,800 and £3,000 per square metre, depending on the complexity and quality of the build.
Several factors influence the final cost, including materials, labour, structural alterations, and whether planning permission is required. A garage conversion is usually more cost-effective when the existing structure is in good condition and little structural work is needed.
On the other hand, a well-designed extension can deliver a stronger return on investment over time, especially when it significantly increases the home’s living space. Choosing between them depends on your budget, long-term goals, and how much additional space you truly need.
Which Option Adds More Value to Your Home?
When it comes to home improvement ideas, both garage conversions and residential extensions can boost your property’s value - but the return on investment differs. Extensions generally offer a higher ROI, especially when they add usable square footage like an open-plan kitchen or an extra bedroom.
Buyers tend to prioritise larger living areas, well-designed layouts, and high-quality finishes, all of which are more achievable with an extension.
That said, a garage conversion can still add value, particularly in urban areas where space is tight, and the garage isn’t being used for parking. If you’re thinking about resale potential, we recommend assessing what buyers in your area are likely to value most.
Our team can provide expert advice based on your location, goals, and budget to help you choose the option that makes the most sense for your home and future plans.
Other Key Considerations Before Making a Decision
Before deciding, it’s important to look beyond garage conversion cost or extension budgets. Here are a few other factors to keep in mind:
- Planning Permission & Building Regulations: Garage conversions may fall under permitted development, but both options must meet building regulations. Always check with your local authority.
- Energy Efficiency: Proper insulation is essential, especially for garages originally built for vehicles. Upgrading walls, floors, and windows can improve comfort and reduce bills.
- Project Timeframe: Garage conversions typically take a few weeks, while extensions can take several months depending on complexity and planning stages.
Conclusion - Which Option is Right for You?
Still deciding between a garage conversion and a residential extension? Garage conversions are quicker and more affordable, while residential extensions offer more space and higher long-term value.
At Viewscape Construction, we bring over 20 years of experience and handle everything from planning to completion—no sub-contractors, just skilled professionals. For expert advice tailored to your home and budget, call us on 01202 918072 or use our contact form to get started. Let’s build the space you need.
