House Extensions
Single and double-storey extensions, built to add real space and value.
ExploreLondon Building & Renovation
Homes built and finished to a diamond standard
Extensions, loft conversions, bathrooms and premium tiling across London — delivered by one family-run team from first quote to final handover.
Est. 2018 · Fully insured · Free quotes · Covering London
Est. 2018 · Edgware, London
A London builder who treats every finish as the final word
AS Diamond House Ltd is a family-run building and renovation company based in Edgware, working across North and North-West London. Since 2018 we have built extensions, converted lofts, installed bathrooms and restored period tiled floors for London homeowners.
Our work is judged on the details: level floors, straight grout lines, tight joinery and a site left clean at the end of each day. Fully insured, honest with quotes, and easy to reach from the first call to the final handover.
More about usWhat we do
Our services
Loft Conversions
Turn unused roof space into a bright bedroom, office or en-suite.
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Bathrooms & Wet Rooms
Complete bathroom and wet room installations with a flawless finish.
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Tiling & Victorian Tile Restoration
Our specialism: period Victorian floors laid and restored by hand.
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Kitchens & Flooring
Kitchen installation and hardwood, tile or engineered flooring.
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Plumbing, Carpentry & Full Refurbishment
Whole-property refurbishment with all trades under one roof.
ExploreOur specialism
Victorian Tile Specialists
Original Victorian and Edwardian floors are laid tile by tile, in period patterns and colours. We restore tired hallways, porches, paths and fireplaces — and lay new geometric floors that look like they have always belonged in the house.
See our tiling work
Transformations
Before & after
A period floor brought back to life. Drag the handle to compare the same hallway before and after restoration.
Drag to see the transformation
Why AS Diamond House
Built on the basics, done properly
Established 2018
Seven years building and renovating London homes.
Fully insured
Public Liability insurance in place on every project.
Free, no-obligation quotes
Clear pricing before any work begins.
Quality finish & tidy work
Careful detailing and a clean site, every day.
Recent work
Gallery
How we work
A simple, four-step process
- 01
Free consultation & quote
We visit, listen and give you a clear written quote at no cost.
- 02
Design & planning
Materials, layout and schedule agreed before anyone lifts a tool.
- 03
Skilled build
One team on site, working cleanly and keeping you updated.
- 04
Finishing & handover
Snagging, final clean and a walkthrough of the finished work.
Where we work
North & North-West London
Based in Edgware and working throughout North and North-West London, plus Greater London for larger projects. If you are nearby, just ask.
- Barnet
- Harrow
- Edgware
- Finchley
- Mill Hill
- Stanmore
- Hendon
- Greater London
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