Unlock the potential of your home with a tailored loft conversion built for comfort, style and long-term value by Top Grade Build

Why Chooose a Loft Extension?

Loft conversions are one of the most effective ways to expand your home without sacrificing garden space. Whether you’re dreaming of a main bedroom with an ensuite, a private home office, or a stylish guest suite, Top Grade Build Ltd has delivered loft extensions across Twickenham, Weybridge, Kingston, Ascot and beyond.

We specialise in maximising underused space, adding natural light through skylights or dormer windows, and ensuring your new loft feels like a seamless part of your home.

strawberry hill completed large luxury family home renovation and extension

Our Loft Conversion Expertise

At Top Grade Build, we are more than just builders. We are a full home renovation company trusted for:

Structural works from foundations through to roofing

Twickenham loft conversion with top grade scaffolding

Complete electrical works and plumbing installations

Walk in shower room in luxury bathroom in home extension

Heating, underfloor heating and boiler solutions

strawberry hill new boiler room and plumbing by Top Grade Build

Bespoke carpentry and premium joinery finishes

modern wooden Staircase added in loft conversion

Luxury bathrooms, dressing rooms or offices within lofts

walk in wardrobe in twickenham loft conversion

A Premium Service You Can Trust

Our clients across Surrey, Berkshire and West London praise us for our reliability, communication and the quality of our work.

We understand that instructing a building company near you can feel overwhelming. That’s why our process is clear and reassuring:

  • 1. Initial consultation to understand your vision

  • 2. Transparent, detailed quotations with timelines

  • 3. Expert guidance through building control and requirements

  • 4. Dedicated project management from start to finish

  • 5. A clean, respectful approach to working in your home

Where We Work

Top Grade Build is proud to be a building firm based in West London and supporting the South East. We’ve completed loft conversions and renovations for clients in:

  • Twickenham, Strawberry Hill & Kingston
  • Weybridge, Ascot & Winkfield
  • Surrey, Berkshire & surrounding areas

If you’re searching for “top rated builders near me”, or a home improvement specialist who can handle everything from kitchens to lofts, we’re here to help.

See our work

Dormer windows in twickenham home extension
Twickenham loft conversion with top grade scaffolding
modern wooden Staircase added in loft conversion
hiden laundry cupboard complete with washer, dryer, sink and storage space
Hidden bespoke laundry cupboard in new loft conversion
Loft Conversion Showerroom
Completed loft conversion bathroom in grey tones
build in wardrobe and windows in loft extension
Spacious bedroom added in loft extension
Bed close up with upholstered headboard in black
Wide angle of new loft conversion bedroom
strawberry hill completed large luxury family home renovation and extension
Grand new staircase in Strawberry Hill
loft conversion with large dramatic window in the eaves
walk in wardrobe in twickenham loft conversion
Shower Room Bathroom with pattern tiles
Back Garden View of Strawberry Hill Home Extension
Before home extension build work started in Strawberry Hill
Completed Strawberry Hill Rear and Loft Home extension external view
Before home extension project at Front of House in strawberry hill
After Build Completion in Strawberry Hill from the front outside
external view before work started to extend this family home end of terrace house
External View of Completed Weybridge Loft Conversion
End of Terrace home loft extension
Loft Conversion Family bathroom
Walk in shower room in luxury bathroom in home extension
completed bedroom for home extension and loft conversion
plumbing and heating in new loft space of home extension in surrey

FAQ Section: Loft Conversions with Top Grade Build Ltd

In many cases, loft conversions can be built under permitted development rights and do not require planning permission. However, if your property is in a conservation area, a listed building, or you are making structural changes such as dormers or roof extensions, planning approval may be needed. You are likely going to check requirements around party wall agreemens where you share a wall with a neighbour.

It completely depends on the size and scope of your project. Many loft conversions take around 12 weeks, depending on the scale of the project and whether additional features such as a bathroom or bespoke staircase are included. Our team provides a clear schedule from the start so you know exactly what to expect.

We deliver all styles of loft conversions, including:

  • Dormer loft conversions for extra headroom and usable space

  • Velux loft conversions for cost-effective natural light

  • Hip-to-gable conversions for detached and semi-detached homes

  • Mansard loft conversions for maximum space and character

Every project is tailored to your home and lifestyle needs.

The cost of a loft conversion depends on the design, size, and finishes you choose. As a premium home renovation company, we provide transparent, itemised quotes so you know where your investment is going. We also help you balance budget with quality, ensuring your loft adds value and comfort to your home.

Yes — we are a full home renovation company. Our team includes skilled builders, carpenters, plumbers, electricians, decorators, and project managers. From scaffolding and structural works to the final coat of paint, we handle every stage in-house to make the process stress-free.

All electrical work is completed by a registered NICEIC electrician, and gas installations are carried out by a Gas Safe registered engineer. Every project complies with the latest building regulations, giving you total peace of mind about the safety and quality of your new loft.

While there are no guarantees, and it all depends on the choices you make along the way, but a well-designed loft extension can increase your property’s value by up to 20%, especially in high-demand areas like Twickenham, Kingston, Surrey, and West London. Beyond financial value, it also improves how you live in your home every day.