House Extensions

House Extensions Built With Precision

Adding a house extension is one of the most valuable investments you can make in your South East London home. Whether you need a larger kitchen, an open-plan living space, or an extra bedroom, SpaceUp delivers extensions that feel like a seamless part of your original property — built to last, finished to perfection. Starting from £60,000, our extensions cover everything from structural groundwork to final finishes. You get one team, one point of contact, and zero surprises.
The SpaceUp Standard
Types of Extensions We Build

What’s Included:

  • Planning and structural calculations support
  • Full groundworks and foundations
  • Structural steelwork
  • Brickwork, roof, windows and doors
  • Insulation, plasterwork and all internal finishes
  • Plumbing, electrics and underfloor heating options
  • Full project management from start to finish
  • Rear single-storey extensions
  • Side return extensions
  • Wrap-around extensions
  • Two-storey extensions
  • Kitchen extensions with bi-fold or sliding doors
  • Open-plan kitchen-dining-living extensions

Areas We Cover

Herne Hill
Forest Hill
Peckham
Dulwich
Streatham
Clapham
Camberwell
Lewisham
Bromley
Greenwich
Kent and Surrey
What our clients say

Real Reviews. Real Results.

Bathroom fitting
“Fantastic service, highly recommended. SpaceUp were very fast to respond to my enquiry and completed the job perfectly within a tight turnaround time. The price was much better value than other quotes I obtained, and communication was impeccable. I’ll definitely use them again.”
Job location: SE5
Bathroom fitting
“The work was carried out professionally and on time. They fixed the problem with the bathtub and it has been working fine since.”
Job location: SE18
Bathroom and kitchen fitting
“Extremely hard working builders with an ability to solve problems on site, stick to tight schedules, and incorporate late changes.”
Job location: SE18
Bathroom fitting
“SpaceUp and his team were excellent from start to finish, providing a solution to an on-going problem we’ve had with our bathroom which previous tradesman had not been able to fix. Yuriy came to inspect, provided a clear plan of action, a competitive and transparent quote and carried the work out to a very high standard. He was great to communicate with and made the whole project run very smoothly. Will be my go to tradesman for future work I have and would fully recommend him to others. Thanks again!”
Job location: SE23
Kitchen installation
“The SpaceUp team were very professional and clean and tidy. They went above and beyond to completed the job. They overcome any problems and resolved these quickly. Yuriy communicated with me all throughout the project. I would highly recommend and I have booked the team in for another job already.”
Job location: SE13
Kitchen installation
“We were out of London when the team did our kitchen installation but they kept us updated with pictures and message the whole time. We felt out home was in safe hands. We are speaking to the them about a bathroom refitting now and have already given a friend their details!”
Job location: SE5
Reviews on Checkatrade Reviews on Google
South East London Since 2013
Why Choose Us

Why Choose SpaceUp for Your Extension

Estimated costs from £60,000 depending on size and specification
Transparent, fixed-price quotes with no hidden extras
Experienced structural and finishing teams
Local knowledge of SE London planning requirements
Verified reviews on Checkatrade and Google

Book a free home consultation and we’ll assess your space, discuss your ideas, and provide a clear written quote. No obligation.

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