Extension Builders

Looking for a quote for your extension build? We can help build your perfect living space.

A home that works for you

Love your home but need more space? A well-designed extension adds room and value without the hassle of moving.

Whether it’s a new bedroom or an entertainment area, our expert builders create seamless, high-quality additions tailored to your lifestyle.

Syze Developments Extension Builders

Our Approach To Building An Extension

A big project can be daunting – we aim to make it as transparent and predictable as any other service.

Consultation

Understanding your vision comes first. However far you’ve got with planning, we’ll work with you to arrive at a solution that meets your needs and satisfies all necessary regulations. Our long experience frequently helps to add clarity or suggest innovative features for your living space.

Budgeting

Once the design is established, we produce a detailed report showing the cost of materials, labour, permits and other associated expenses. This transparent cost breakdown makes it easy to understand the full scope of the project – allowing you to identify cost-saving opportunities.

Construction

An accurate schedule outlines the entire build – from foundations to finishing touches. Progress is closely monitored to ensure the plan is followed, with problems addressed immediately. Our quality standards ensure that your complete satisfaction is guaranteed from the outset.
Why choose Syze Developments to build your extension

Bringing Your Vision to Life

Your home is more than just a space—it’s a reflection of your lifestyle and aspirations. That’s why we take the time to understand your vision and create a tailored plan with meticulous attention to detail.

With various design and finish options, you’ll make informed decisions at every step. Our skilled tradesmen ensure exceptional craftsmanship, and our Federation of Master Builders-approved contract guarantees transparency, so no unexpected costs once the budget is set.

What sets us apart is our open communication and seamless, stress-free experience — you can enjoy the journey as much as the final result.

“HIGHEST QUALITY”

“Great team to work with. Quote was not the cheapest or most expensive but work finished to highest quality. Great range of innovative problem-solving skills were demonstrated throughout and they were very patient with constant changes by myself”

Customer, Petersfield

“COURTEOUS AND PROFESSIONAL”

“Simon took the time to visit us and discuss our project, giving guidance where needed. Workmen were extremely courteous and professional. The end result is better than we could have hoped for. We highly recommend without reservation”

Customer, Havant

“IMPRESSIVE CRAFTMANSHIP”

“I am beyond pleased with the result of the work carried out. The team were hard working, clean and respectful, and on time daily. Their attention to detail and craftsmanship is impressive. They fully understood our vision and created it perfectly”

Customer, Cowplain

Transforming Homes

We’re proud of the work we do and are happy to show projects we’ve completed for our clients.

Extension And Kitchen Remodel2024-12-29T02:54:04+00:00
Extension And Kitchen Remodel
Extension And Kitchen Remodel

Extension And Kitchen Remodel

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West Meon two storey modern extension2025-03-21T03:56:31+00:00
West Meon two storey extension
West Meon two storey modern extension

West Meon two storey modern extension

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Two Storey Wrap-Around Extension Waterlooville2024-12-29T02:53:44+00:00
Waterlooville two storey extension
Two Storey Wrap-Around Extension Waterlooville

Two Storey Wrap-Around Extension Waterlooville

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Luxury Spa Extension in Clanfield2024-12-29T02:54:35+00:00
Luxury Spa extension
Luxury Spa Extension in Clanfield

Luxury Spa Extension in Clanfield

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Wrap-Around Extension in Petersfield2024-12-29T02:54:19+00:00
Petersfield wrap-around extension
Wrap-Around Extension in Petersfield

Wrap-Around Extension in Petersfield

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Frequently Asked Questions

If you’re dreaming of building an extension onto your home, we recommend first engaging with an architect who will be able to help you explore your options and advise if planning permission will be needed. You will then need to appoint a structural engineer to design the floor and roof structures, as well as provide calculations for supporting beams. View our top tips for planning your extension here.

Whether you will need planning permission for your home extension will depend on the height, length, materials and site restrictions. We can help you to understand what planning permission you might need once we get an understanding of your requirements. You might find it useful to see our article on planning your extension.

Absolutely. A major change to your home can be a daunting prospect if you’re doing it for the first time. Ask us for a consultation and we’ll happily look over whatever plans or sketches you have. We can suggest cost-effective solutions or point out problems early.

When extending your home, you should expect a timeline of at least 16 to 18 weeks from start to finish. If your project is more complex, such as if you are building a second storey, this will take additional time. You can check out our article for more information on how long it takes for an extension to be built.

All homes are different and every extension is unique. But materials and labour costs are surprisingly stable – and we can predict a rough budget even with basic details. See our article ‘How does an extension cost?‘ to get an immediate idea.

The number one concern from customers is that the cost will increase once underway. That doesn’t happen with us. Our contract is approved by the Federation of Master Builders and we project manage carefully to keep the everything on time and to budget.

If you’re dreaming of building an extension onto your home, we recommend first engaging with an architect who will be able to help you explore your options and advise if planning permission will be needed. You will then need to appoint a structural engineer to design the floor and roof structures, as well as provide calculations for supporting beams. View our top tips for planning your extension here.

Whether you will need planning permission for your home extension will depend on the height, length, materials and site restrictions. We can help you to understand what planning permission you might need once we get an understanding of your requirements. You might find it useful to see our article on planning your extension.

Absolutely. A major change to your home can be a daunting prospect if you’re doing it for the first time. Ask us for a consultation and we’ll happily look over whatever plans or sketches you have. We can suggest cost-effective solutions or point out problems early.

When extending your home, you should expect a timeline of at least 16 to 18 weeks from start to finish. If your project is more complex, such as if you are building a second storey, this will take additional time. You can check out our article for more information on how long it takes for an extension to be built.

All homes are different and every extension is unique. But materials and labour costs are surprisingly stable – and we can predict a rough budget even with basic details. See our article ‘How does an extension cost?‘ to get an immediate idea.

The number one concern from customers is that the cost will increase once underway. That doesn’t happen with us. Our contract is approved by the Federation of Master Builders and we project manage carefully to keep the everything on time and to budget.

Professional Affiliations

Our contracts are approved by the Federation Of Master Builders for total peace of mind.

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Federation Of Master Builders
Trust A Trader Logo
Buildertrend Logo
Federation Of Master Builders
Trust A Trader Logo

What happens next?

Ready to take the next step? We offer a free, no-obligation home consultation to discuss your ideas. Whether you have detailed plans or just a rough sketch, we’ll provide expert guidance to help you move forward with confidence.

Fill out the form to get started—we’d love to hear about your project!