One of my projects last year was maximising the potential of a house extension. Or more specifically, a bungalow extension that converted a garage into a much larger kitchen and added a new bedroom in the loft. There was space for a miniature utility room, bi-fold doors that opened into the garden, and an en suite in the bedroom.
Because bungalows aren’t too big to start with, it was really important to get the design right to create a cohesive, functional space. But at the same time, ensuring the extension felt homely.
So if you’re considering a house extension project in the new year and are looking for interior design ideas, this post should help.
Defining the Purpose of the Space
The first step in designing your house extension is to define its purpose. Knowing how you intend to use the space will guide every design decision, from layout and lighting to furniture and decor.
Are you looking to create a cozy family living room, an expansive open-plan kitchen, a serene home office, or a versatile guest bedroom? Each purpose requires a different approach to functionality and style.
For the bungalow extension, the living space was separate from the kitchen, so the focus was on creating a functional kitchen with enough space for dining, while also incorporating a utility room. On the other hand, if it had been an open-plan kitchen/living extension, priority would have been keeping that functional kitchen while ensuring enough coziness to relax and unwind in the living space.
Think about the future of your extension, too. Could the space evolve with your changing needs? A playroom for young children might later become a study or a hobby room. By defining the purpose early, you can ensure your extension is not just an addition to your home but a space that enhances your daily life.
Harmonising Old and New Spaces
When designing a house extension, one of the most important considerations is how to blend the new space with your existing home. A well-designed extension should feel like a natural continuation, not an afterthought. Harmonising the old and new spaces ensures a cohesive flow and enhances the overall appeal of your home.
Start with consistency in materials and finishes. Match the flooring, woodwork, and paint colours to create a seamless transition. As an example, if your home features oak flooring or classic panelling, consider incorporating these elements into the extension. But don't shy away from subtle contrasts if they complement the overall style, like pairing sleek modern features with traditional accents.
Furniture and decor also play a role in unifying the spaces. Use complementary styles, colour palettes, and textures to tie everything together. However, don’t be afraid to create a statement room somewhere in your home that really stands out, if this is your thing. For example, a separate study that uses dark wood and matching furniture to get you in the zone can still be appropriate, regardless of how the rest of the home looks. Your house is your blank canvas, after all.
Here’s an example below. I love this space as it includes everything you need in a functional kitchen while incorporating lots of natural light (more on this next). Attention should be given to the dining area towards the back so that this adjacent spaces flows from the kitchen. Matching light shades and art can really work well.
For the bungalow extension, I used the same flooring throughout to give the home a nice flow, while using matching panelling in the kitchen and connecting utility room. Between the different rooms, such as the kitchen and separate living space, I used similar art pieces to subtly connect each room to one another.
Maximising Natural Light
Natural light can transform your house extension, making it feel more spacious, inviting, and connected to the outdoors.
Large windows and glass doors are the most effective ways to bring in sunlight. Consider installing floor-to-ceiling windows, sliding glass doors, or bi-fold doors that open up the space to your garden. These features not only flood the extension with light but also create a seamless indoor-outdoor connection.
Skylights and roof lanterns are excellent additions, especially for single-storey extensions or spaces that lack wall space for windows. They channel natural light from above, making the room brighter throughout the day.
I made use of several Velux skylights in the bungalow extension, both in the converted garage-to-kitchen and also the additional loft conversion. Bi-fold doors in the kitchen were great for natural light, too.
Interior elements can also amplify light. Mirrors placed strategically opposite windows can reflect sunlight and make the room appear larger. Opting for light-coloured walls, ceilings, and furnishings can also create an airy and bright feel, while translucent curtains or blinds allow privacy without blocking daylight.
Finally, think about the placement of the room within your home. South-facing extensions benefit from all-day light, while north-facing spaces may require additional design elements to maximise brightness. A light-filled extension will always feel uplifting and welcoming, no matter its purpose.
These full-length windows below really work well for bringing in natural light while utilising translucent curtains. But also look at the feature spot lights above the art, bringing an illusion of making the room feel larger.
Layout and Furniture Planning
The layout of your house extension is the foundation of its functionality and flow. When I designed the bungalow extension, I had to consider the old garage being attached to the original kitchen, which created an ‘L’ shaped layout. Thoughtful furniture placement and spatial planning meant the space worked for the kitchen’s intended purpose, but finding room for a dining table and utility room, too.
So it’s always best to start by considering how the space will be used. For open-plan extensions, define zones for different activities, such as dining, lounging, or working. Use furniture like sofas, rugs, or shelving units to create subtle divisions without blocking the flow of the room. Ensure pathways are clear and intuitive to maintain an open and accessible feel.
Scale is critical when selecting furniture. Oversized pieces can overwhelm the space, while too-small furniture can make it feel sparse.
My dilemma in the bungalow was trying to fit an island in the kitchen space, but knowing a dining table was also required. Ultimately, there wasn't enough space for both, so we opted for the dining table. Therefore it’s so important to choose items that work to the room’s dimensions. Multifunctional pieces, such as a dining table that doubles as a workspace or a sofa bed for guests, can optimise the space well, particularly in smaller homes like bungalows.
And thinking about maximising natural light again, it’s best to avoid bulky furniture near windows or glass doors. Depending on the project, I like to choose lighter, streamlined designs to maintain an airy atmosphere.
Adding Character and Personality
As we touched on before, your house is your blank canvas, and your extension is no different. It offers the perfect opportunity to infuse your personal style and make the space truly your own.
Start with a focal point to anchor the design. This could be a bold feature wall, an eye-catching piece of artwork, or a statement light fixture. These elements draw attention and give the space a distinct identity.
Layering textures is another way to create depth and interest. Combine materials like soft textiles, natural woods, sleek metals, or exposed brick to add richness. For example, a plush rug paired with a leather sofa and a stone fireplace can create a cozy yet sophisticated living area.
Use colour strategically to express your personality. Whether through painted walls, vibrant cushions, or patterned curtains, colours can transform the mood of the space. If you prefer a more neutral palette, add pops of colour through accessories or plants for a lively touch, or even an atrium…they can be real statements in the right space.
And for that homely touch, incorporate meaningful items such as family photos, cherished keepsakes, or vintage furniture that tells a story. By blending these personal touches with thoughtful design, your extension will not only be functional but also a true reflection of you.
Storage Solutions
Finally, it’s always good to think about storage. Built-in shelving or under-seat storage can help maintain a clutter-free environment. Whether you’re designing a cozy family room or a sleek kitchen-diner, an efficient layout and carefully chosen furniture will elevate the style and practicality of your extension.
Here’s some inspiration from a current project where we’re maximising the space around the functionality of the living room:
Summary
We’ve covered a lot so let’s recap.
Define the purpose: Tailor the design to suit your needs, whether it’s a family room, office, or kitchen.
Blend old and new: Create a seamless flow by harmonising materials, colours, and architectural details.
Maximise natural light: Use windows, skylights, and reflective surfaces to brighten the space.
Plan the layout: Optimise space and choose furniture that complements the room’s dimensions.
Add personal touches: Incorporate character through unique decor, textures, and meaningful elements. Don’t be afraid to go a bit wild if this fits you!
Think about storage: Strategically placed storage almost never goes amiss, so take your house renovation as an opportunity to add more into your home.
A thoughtfully designed house extension can transform your home, adding both value and versatility. By defining the purpose of the space, harmonising it with your existing home, and incorporating elements like natural light and carefully chosen furniture, you can create a functional yet beautiful addition. Personal touches, such as feature walls, unique textures, or meaningful decor, make the space truly your own.
Transforming your house extension into a beautiful and functional space doesn’t have to be overwhelming. Let us help bring your vision to life. Get in touch today for personalised advice and tailored solutions that make your extension truly exceptional.
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