Loft Conversion Specialists

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

More space for growing needs

As families grow, homes can quickly feel cramped and insufficient. A loft conversion can seamlessly transform wasted space into an extra bedroom and bathroom.

Typically, it’s one of the highest-return investments in home development – easily accommodating your evolving family needs while avoiding the hassle and expense of moving house.

Can my loft be converted?

The good news is yes – probably. Some lofts are more suitable for conversion than others, with head height, roof pitch and type of roof structure determining how tricky the conversion might be. But, as shown below – there are many different approaches giving lots of possibilities.

Skylight Loft Conversion

Skylight conversions are ideal for homes with ample attic space and require minimal alteration to be functional. Windows are installed directly into the slope of the roof, bringing light and ventilation. Ceiling timbers need to be reinforced to make them suitable for flooring.

UnconvertedSkylights

Dormer Loft Conversion

Dormers are very popular as they provide significant additional floorspace and headroom while being simple to construct. The box-like dormer protrudes from the roof, and their vertical windows feel very natural from inside. They are constructed within the existing roof width.

UnconvertedDormer

Mansard Loft Conversion

A Mansard conversion offers the maximum amount of space for a loft conversion, reaching all the way to each boundary wall or gable end. Significant changes to the roof are required – but the result is timelessly stylish, characterised by a 72 degree slope on the roofline.

UnconvertedMansard

Hip To Gable Loft Conversion

In this conversion, the slanted (or ‘hipped’) end of a roof is made vertical – recovering otherwise wasted space. Further modifications are then applied to the new profile, resulting in a significant gain in head height and floorspace for bungalows, end-of-terrace and detached homes.

SkylightsHipped Roof
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Jason Ralphs
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We are really happy with the quality of the work that Syze completed. They managed the onsite team of trades well and we had an open and honest dialogue throughout the build. We had several complications to the project such as asbestos removal that required specialist removal, which they managed well. We would use Syze again for future projects.
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Lisa Guile
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Syze Developments were recommended to me & rightly so. From the word go, the owner and contractors were professional, friendly and above all, helped me with decisions in how best to refurbish my 70's bungalow into a stylish contemporary home. Simon will project manage everything for you, liaising with architects, structural engineers & surveyors. His team are experienced & dedicated and take professional pride in their work. The results speak for themselves. I recommend them to anyone with small, medium or large size projects. They carried out a complete refurbishment of my 3BR bungalow with new kitchen, bathroom and beautiful bifold doors. They even took care of my needs in the garden, laying composite decking & adding a stunning resin driveway. I'm happy to show case my home in Waterlooville. Just ask Simon to contact me! That's how much I rate Syze Developments.
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Nick Blake
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Simon and team have done a terrific job for us. Our architect had designed a new kitchen extension, together with several other alterations to the layout of our house. The team, led by John..a stickler for detail..were courteous, clean and tidy and worked around us as we continued to live in the house over a multi-month build. All the trades seemed nicely synchronised and have clearly worked together many times. Inevitable design changes came up and these were all expertly integrated into the plan, with budget changes discussed and agreed as we went. The team made many helpful suggestions, which we'd have never thought about. This was our first ever 'development' and we were a bit nervous, but we're delighted with the result.
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Abby Neal
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Quick, clean and everything has a great finish. Thank you to Simon and his entire team for getting the project completed in the time frame discussed and for making our visions come to life. We’re really pleased with how everything has turned out.
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Pauline Stainsby
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Would highly recommend Simon and his team. We had our open plan kitchen extension designed and built by Syze developments to create a downstairs bedroom. The workmanship was excellent. The build was on time and in budget.
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Brandon Killien
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The end result was exactly what we wanted. The project was slightly delayed due to supplier issues, but it was worth the wait. The team was polite and ensured the area was left clean every night. There was slight creep of the scope of work, but this was due to another trade letting us down. Simon and the team carried out this additional work with no issue, and reasonably priced. Very happy customer.
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Darren Tutte
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Simon and his team completed a 2-storey side extension as well as internal re-design of the existing property. Really pleased with the build quality and workmanship. The core team were friendly, experienced and did a great job trying to minimise disruption as best they could. All the different trades worked well together and were always happy to discuss and make any changes.
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Caroline Siddall
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I looked into several building firms before trusting Simon and his team to do the job. It was a complex double storey extension and redecoration to accomodate my father in law. I am delighted with the results - I would use them again without hesitation. All workmen used were very clean and tidy and any issues were resolved quickly and without disruption.
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.

Frequently Asked Questions

A simple loft conversion with Velux windows can cost as little £30,000 – whereas a complete high-end rebuild of the upper storey of a house may cost £130,000.
The construction phase will provide a watertight superstructure with finished roofing, glazing and staircase built to regulations and signed off by the building inspector.
Duration depends on complexity. A discrete conversion with Velux windows typically takes between 6-8 weeks, a dormer 8-10 weeks and a new build between 12-16 weeks.
We can arrange a start date for a Loft Conversion project within 6-8 weeks from contract and always within 12 weeks – or scheduled around your existing commitments.
A simple loft conversion with Velux windows can cost as little £30,000 – whereas a complete high-end rebuild of the upper storey of a house may cost £130,000.
The construction phase will provide a watertight superstructure with finished roofing, glazing and staircase built to regulations and signed off by the building inspector.
Duration depends on complexity. A discrete conversion with Velux windows typically takes between 6-8 weeks, a dormer 8-10 weeks and a new build between 12-16 weeks.
We can arrange a start date for a Loft Conversion project within 6-8 weeks from contract and always within 12 weeks – or scheduled around your existing commitments.

Case Studies

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

Our Approach To Loft Conversions

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

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 at the top of this page to get started—we’d love to hear about your project!

Professional Affiliations

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