Double Storey Extension Ideas 2026

Dreaming of another bedroom? Pining for some extra storage space? Or perhaps you’re planning for another arrival to the family?

Whatever the reason, expanding your home rather than moving is a great way to save money, save hassle and keep prioritising the home you love.

And what better way to do that than with a double-storey extension?

And in 2026, West Midlands Building Company are here to provide more thoughtful, more stylish and more personal two-storey extensions.

Get in touch with our expert team to learn more and get a quote.

So, what are the best double floor extension ideas for 2026, and how do you choose the right one for your home? Let’s find out.

Different Types of Double Storey Extensions

Rear Double Storey Extensions

When people search for double storey rear extension ideas, they’re often looking for the biggest transformation possible, and a rear extension can certainly deliver!

Extending across the back of your home allows you to completely reimagine the ground floor while creating that valuable additional accommodation upstairs.

Some great two-floor rear extension ideas include:

• Large open-plan kitchen diners
• Spacious family rooms
• Utility rooms and pantries
• Home offices
• Master bedrooms with en-suites
• Extra children’s bedrooms
• Guest bedrooms

Top tip: why not combine indoor and outdoor living for your double-storey rear extension? Use large sliding or bifold doors downstairs alongside feature windows upstairs that overlook the garden. Your home can then feel brighter, more spacious and perfectly suited to modern family life!

Side Double Storey Extensions

Have unused land alongside your property? Exploring double-storey side extension ideas could be a super smart and strategic choice!

Detached and many semi-detached homes often have enough side space to create a substantial extension without sacrificing too much garden.

Popular two-storey side extension ideas include:

• Wider kitchens
• Utility rooms
• Additional living rooms
• Larger entrance halls
• Extra bedrooms
• Family bathrooms
• Home offices

Top tip: A side extension can also improve the overall balance of your property, particularly if your existing layout feels narrow or disconnected.

Wrap Around Double Storey Extensions

And why choose between a rear extension and a side extension when you can combine both?!

Wrap-around extensions create some of the most dramatic home transformations possible, opening up the entire ground floor while significantly increasing the upstairs footprint.

Top tip: Wraparounds are ideal for those planning to stay in their property long-term and wanting a true “forever home”, as it gives you the ability to make your dream house a reality.

Front House Double Storey Extensions

Although potentially less common, front house extensions can work beautifully on detached homes with generous front gardens or driveways.

For a double-storey property, they can provide:

• Larger entrance halls
• Additional living areas
• New bedrooms
• Improved kerb appeal

Top tip: As these extensions alter the appearance of your home, planning permission is usually required, making it important to work with an experienced building company (like us here at WMBC!) from the outset.

Two Storey Extension Design Ideas

When considering two storey extension design ideas, it’s important to think beyond simply creating more space. 

We think that the best extensions feel like they’ve always been part of the original property!

Contemporary Designs

Modern homes often benefit from clean lines, large areas of glazing and minimalist finishes. Popular features for two-storey extensions include:

• Anthracite aluminium windows
• Flat roof elements
• Large sliding doors
• Rendered finishes
• Roof lanterns
• Open-plan layouts

These designs maximise natural light while creating a sleek, modern appearance.

Traditional Designs

If your property has plenty of character, matching the existing architecture is often the best approach. Traditional designs typically include:

• Matching brickwork
• Pitched roofs
• Bay windows
• Heritage-style windows
• Decorative brick detailing

The aim is to make the extension blend seamlessly with the original home.

Mixed Material Designs

One of the biggest trends for 2026 is combining materials to create visual interest. We just love:

• Brick with timber cladding
• Render alongside traditional brick
• Stone detailing
• Black aluminium glazing

These combinations help modern extensions stand out without looking out of place.

What Type of Roof For Your Double Storey Extension?

Your roof doesn’t simply protect the extension – it plays a huge role in its overall appearance! That’s why having expert advice to ensure you make the right decision is so important.

Some popular roof ideas for double story extensions include:

Pitched Roofs

A pitched roof remains the most popular choice, blending naturally with existing homes while offering excellent insulation and drainage.

Gable Roofs

Gable roofs create additional ceiling height upstairs while adding architectural interest to the exterior.

Hipped Roofs

Perfect for larger detached homes, hipped roofs create a balanced appearance while improving weather resistance.

Flat Roof

Many contemporary double storey extensions combine traditional pitched roofs with flat roof sections over kitchens or side returns, creating opportunities for roof lanterns and extra natural light.

Choosing Windows & Doors For Two-Storey Extensions

Now the roof is sorted, it’s time to talk windows and doors. Because the right glazing can make or break an extension, as they control light, views and flow of the entire room.

Ground floor ideas:

• Bifold doors
• Sliding patio doors
• French doors
• Corner glazing
• Floor-to-ceiling windows

Upstairs ideas:

• Picture windows
• Juliet balconies
• Large feature windows
• Gable glazing

Together, these features create brighter interiors while strengthening the connection between your home and garden.

Interior Finish Ideas for Double Floor Extensions

Now the real magic can begin! Once the extension is built, thoughtful interior design brings the space to life.

In 2026, it’s all about creating spaces that feel effortlessly connected, balancing practicality with luxurious design touches that make everyday living that little bit more enjoyable.

When planning your interiors, you could consider:

• Lighting design: Layered lighting using spotlights, statement pendants, wall lights and soft ambient lighting creates a warm, welcoming atmosphere from morning coffee through to cosy evenings.
• Flooring continuity: Running the same flooring throughout the ground floor helps open-plan spaces feel larger and creates a seamless transition between the original home and the extension.
• Ceiling features: High ceilings, vaulted spaces, roof lanterns and skylights add architectural interest while flooding your home with natural light.
• Heating solutions: Underfloor heating remains a favourite for modern extensions, providing year-round comfort while freeing up valuable wall space for furniture and design features.
• Built-in storage: Bespoke cabinetry, fitted wardrobes and hidden storage solutions keep busy family homes organised without compromising on style.
• Colour and texture: Soft, earthy tones paired with natural materials such as timber, stone and textured finishes create timeless interiors that feel warm, sophisticated and inviting.
• Feature spaces: Consider adding luxury touches such as a kitchen island, walk-in pantry, reading nook, dressing room or spa-inspired ensuite to elevate your extension and make it truly unique.

Exterior Finish Ideas For Two-Storey Extensions

And, of course, while it’s easy to focus on the extra space inside, the exterior of your extension deserves just as much attention.

A double-storey extension should complement your home’s original architecture while adding a contemporary touch.

In 2026, trends embrace a mix of traditional craftsmanship and modern design, combining timeless materials with sleek finishes. Popular exterior finishes include:

• Brickwork: Matching or complementary brickwork creates a cohesive appearance, helping the extension blend naturally with the existing home.
• Render finishes: Smooth or textured render offers a clean, contemporary look that’s perfect for modernising older properties or creating striking architectural contrast.
• Timber cladding: Natural timber introduces warmth, texture and character, making it an increasingly popular choice for contemporary extension designs.
• Mixed materials: Combining brick, render, stone or cladding adds depth and visual interest while maintaining harmony with the original property.
• Roofline details: Matching roof tiles, fascia boards, guttering and roof pitches ensure the extension feels like a seamless continuation of the home rather than a later addition.
• Windows and doors: Slimline aluminium frames, heritage-style windows or statement glazing can transform the overall appearance, enhancing both kerb appeal and natural light throughout the property.

Planning a Double Storey Extension?

If you’re in full planning mode, before any building work begins, here’s a list of things to consider:

• Planning permission
• Building Regulations
• Structural calculations
• Party Wall Agreements (where applicable)
• Drainage
• Energy efficiency
• Access during construction

Working with an experienced building company – like us here at WMBC – helps ensure everything runs smoothly from design through to completion.

Ready To Build Your Double Storey Extension?

Whether you’ve been inspired by double storey rear extension ideas, practical side extensions or creative two storey extension designs, there’s never been a better time to invest in your property.

At West Midlands Building Company, we’ve completed hundreds of extension projects across Birmingham and the wider West Midlands, helping homeowners transform the way they live. With over 150 positive Google reviews, we’ve built a reputation for quality workmanship, outstanding customer service and beautiful home improvements.

We also offer a variety of finance options, including buy now, pay later plans, and at the time of writing, we’re the only provider in the West Midlands to offer finance terms of up to 20 years on conservatory projects.

Ready to bring your two-storey house extension ideas to life? Get in touch with our friendly team today for a FREE, no-obligation quotation and expert advice on the next steps.

Related Articles:

How Much Will a Double Storey Extension Cost?

Do You Need Planning Permission for a Double Storey Extension?

How Long Does It Take To Build a Double Storey Extension?