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How to Keep a Garden Room Cool in Summer

When temperatures climb into the high 20s and beyond, many UK homes can become surprisingly uncomfortable. Conservatories often become unusable, upstairs bedrooms trap heat, and working from the dining table quickly loses its appeal. A bespoke garden room offers something different.

At Miniature Manors, we design and build insulated garden rooms across Sussex and Surrey that are comfortable throughout the year. With thoughtful design, the right amount of glazing and a few optional upgrades, your garden room can become one of the coolest places to relax, work or entertain during a heatwave.

In this guide, we’ll explain how to keep a garden room cool in summer, the design features we recommend, and how to get the most from your investment.

Do Garden Rooms Get Too Hot?
This is one of the questions we’re asked most frequently. The simple answer is they can, but only if they haven’t been designed specifically to your needs. Just like a house, a garden room with large areas of south-facing glazing will naturally gain more heat than one designed with shading and ventilation in mind. The good news is that there are several ways to control this, and we consider all of these during the design stage.

Factors that influence the temperature include:

– The direction the building faces
– The amount of glazing
– Roof overhangs
– External shading
– Ventilation
– Insulation
– Whether air conditioning has been installed

Every garden is different, which is why we don’t offer one-size-fits-all buildings. Instead, we design each garden room around your property and how you intend to use it. It is worth highlighting any concerns about where the sun will potentially be strongest in the garden room during the design process.

Air Conditioning – Our Favourite Upgrade
If you plan to use your garden room all year round, we believe air conditioning is one of the best investments you can make. Modern systems don’t just cool your room during summer. They also provide highly efficient heating throughout winter, meaning one unit keeps your garden room comfortable in every season.

At Miniature Manors, we prepare everything for air conditioning during the build, including:

– Sufficient electrical supply
– Considered cable routes
– Wall bracket positioning
– Concrete base for the external condenser

Once the building is complete, our trusted air conditioning specialist carries out the installation. This has another important benefit. Because the air conditioning is supplied and installed directly by our specialist contractor, qualifying domestic installations may benefit from the current 0% VAT rules for eligible energy-saving installations. The rules are set by HMRC and depend on the type of system and installation, so we always recommend checking the latest government guidance.

You can read more here:

HMRC Energy-Saving Materials Guidance

GOV.UK VAT on Energy Saving Products

Create Shade with a Side Canopy
One of the simplest ways to reduce solar gain is by creating shade outside the building. A side canopy transforms the space around your garden room into another usable area while reducing direct sunlight on the glazing. Many of our Sussex customers use their canopy for:

– Outdoor seating
– BBQ areas
– Garden dining
– Sheltering a hot tub
– Children’s play areas
– Keeping outdoor furniture protected

It creates a natural transition between your home, your garden and your new building. If a side canopy is a feature you’re considering for your building, you may feel inspired by this garden room design in Uckfield, East Sussex. Spanning seven metres long, this handcrafted garden room features a generous overhang to the side, which is used as a sheltered outdoor seating area. Similarly, we added a side shelter to this multi-purpose garden room in Lindfield, Mid Sussex which is used to house a hot tub.

Turn Your Garden Room into the Ultimate Summer Entertainment Space
Summer is when many garden rooms really come into their own. Instead of everyone squeezing into the kitchen, imagine opening the sliding doors onto the garden and entertaining in your own dedicated space.

A Garden Bar
A bespoke garden bar is perfect for hosting family and friends during warm evenings. Add a drinks fridge, feature lighting and Bluetooth speakers and you’ll wonder why you didn’t build one sooner.

Outdoor Kitchen
Many customers now combine their garden room with an outdoor kitchen, creating the perfect place for BBQs and alfresco dining. Whether it’s pizza ovens, built-in barbecues or simply extra preparation space, your garden room becomes the social hub of the garden. At this spectacular build in Surrey, we included a South African Braai for the ultimate garden kitchen experience.

Garden Room with Indoor BBQ

Cinema & Sports Room
Large sliding doors allow fresh air to circulate while still enjoying films or sporting events on a big screen. Your home can become the hub for blockbuster films or events like Wimbledon and the World Cup. It’s a fantastic way of entertaining without guests taking over your main house.

A Better Place to Work During Summer
Working from home has become the norm for many people. Unfortunately, the kitchen table often isn’t designed for productivity, especially when the house becomes hot and noisy during school holidays.

A garden office provides:

– A quieter working environment
– Natural daylight
– Separation from the house
– Year-round insulation
– Air conditioning for hot weather should you choose to install it
– Efficient heating during winter

Many clients tell us they become far more productive simply because they have a dedicated workspace away from the distractions of the house.

It’s Not Just About Summer
While the focus here is on hot weather, a professionally built garden room should perform brilliantly every month of the year. All Miniature Manors garden rooms include high levels of insulation within the walls, floor and roof, making them suitable for year-round use.

One of the biggest advantages of choosing a bespoke garden room is that every detail can be tailored to your property.

During the design process, you may wish to consider:

– Where the sun rises and sets
– Which elevations receive the most direct sunlight
– Window positions
– Roof overhangs
– Canopies
– Privacy
– Views into the garden
– Future landscaping

Sometimes simply reducing the amount of south-facing glazing can make a huge difference to comfort while still flooding the room with natural light. Good design often removes the need for complicated solutions later.

Why Sussex & Surrey Homeowners Choose Miniature Manors

Since 2008, we’ve designed and built bespoke garden rooms across Sussex, Surrey and the surrounding areas. Every project is individually designed around our clients’ lifestyle, budget and garden.

Whether you’re looking for a garden office, garden gym, outdoor entertaining space or somewhere simply to escape the summer heat, we’ll help create a building that works beautifully throughout the year. Unlike many off-the-shelf garden buildings, our rooms are fully insulated, built to last and designed to become a genuine extension of your home.

Some Frequently Asked Questions

Do garden rooms get hot in summer?
A poorly designed garden room can become warm during hot weather. However, careful positioning, shading, insulation, ventilation and optional air conditioning help maintain a comfortable temperature throughout the summer.

Is air conditioning worth installing?
If you intend to use your garden room throughout the year, absolutely. Modern systems cool during summer and provide efficient heating during winter, making them one of the most popular upgrades we install.

Can I have a hot tub next to my garden room?
Yes. Many customers choose to add a side canopy, creating a sheltered area for a hot tub, seating or outdoor dining.

Can a garden room be used all year?
Yes. Our garden rooms are fully insulated and designed for year-round use. Adding heating or air conditioning ensures they remain comfortable in every season.

Thinking About Building a Garden Room?
If you’re considering a bespoke garden room in Sussex, Surrey or the surrounding areas, we’d be delighted to help. We offer free design consultations and create every building around your property, lifestyle and how you want to use the space. Whether you’re dreaming of a garden office, bar, gym, studio or outdoor entertaining space, we’ll help you create a room you’ll enjoy throughout every season.

Make a design appointment:
Miniature Manors
141 South Road
Haywards Heath
West Sussex
RH16 4LY

📞 01403 610619
✉️ contact@miniaturemanors.co.uk

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