Home Extensions in Twickenham, Surrey & Berkshire | Single Storey, Kitchen, Side Return & Over-Garage

Build more life into your home

Whether double or single-storey extensions, kitchen extensions, side return extensions and over-garage designs, we will deliver finished results with quality details and careful project management.

completed new kitchen with build in induction hob in the island and 4 bar stools

Space designed for the way you live

When your home isn’t working for you here at Top Grade Build we can transform your home by building an extension that is designed for just what you need across Twickenham, Hampton, Ascot, Bracknell, Windlesham, Weybridge and nearby.

Single-Storey Extensions

Open up your ground floor for a generous kitchen, dining and family space, flooded with natural light.

external view of single storey cookham home extension

Kitchen Extensions

Create a true heart-of-home layout with island seating, utility space and pantry storage that declutters daily life.

Skylight kitchen renovation project

Side Return Extension

Turn unused side space into valuable square footage, ideal for a wider kitchen and better flow to the garden.

lean to rear kitchen extension in berskhire

Over-Garage Extension

Add bedrooms, an office or a luxe ensuite above the garage with seamless exterior detailing and structural integrity.

large family bathroom completed in surrey home extension with blue betro tiles and feature pattern tiled wall with freestanding bath and walk in rainfall shower

What You Can Expect

Premium process. Predictable outcomes.

    • Design and planning support: We collaborate with your architect to ensure the vision is delivered just as expected.

 

    • Structural know-how: Foundations, steel beams, load-bearing wall removals, new internal walls and precise brick matching.
    • Services done right: First and second fix carpentry, plumbing, electrics, heating and underfloor heating, ventilation and insulation.
    • Finishes that last: Bespoke kitchens, utility rooms, bathrooms, tiling, flooring and decorating with exacting detail.

 

  • Respect for your home: Tidy sites, neighbour consideration, clear timelines and weekly progress updates.
Electrical safety certificate in UK
Gas Safe Certificate Logo for UK

Be reassured that all electrical work is carried out by a NICEIC registered electrician, and all gas work by Gas Safe registered engineer.

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.

Loft Extensions Too

Growing upwards can be the smartest move for extra bedrooms and a master suite.

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: Home Extensions with Top Grade Build Ltd

In some cases, single-storey and side return extensions can be built under permitted development. However, if your property is in a conservation area, a listed building, or you are making structural changes, planning approval may be needed. We can advise on the right route and handle building regs compliance.

It completely depends on the size and scope of your project. Many single-storey extensions take around 10-16 weeks, depending on the scale of the project and whether additional features such as a bathroom or bespoke cabinetry are included. Our team provides a clear schedule from the start so you know exactly what to expect.

 Yes. We deliver the full package including kitchen fit, utility, bathroom, tiling, flooring and decorating.

Every project is tailored to your home and lifestyle needs.

The cost 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 home extension 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 high quality extensions typically increase both everyday liveability and resale value, especially in sought-after areas across the South East.

 We design efficient services throughout, including underfloor heating, lighting plans and ventilation that meets current standards.