Home Improvement Contractors: London #1 Local Builders

With over 1000 Residential Home Improvements and Commercial Building Services, including home extensions & loft conversions, basement tanking and waterproofing, kitchen and bathrooms, we can call ourselves expert London building contractors.


We undertake all responsibilities from architectural design to building regulations and local authority approval.

design and build

We undertake all responsibilities from architectural design, planning permission and local authority approval.


We offer a value for money services, with a wealth of ideas and solutions that can enhance the architecture of your space.

We Offer Solutions

Our skilled architects work with an in-house team of highly experienced contractors, delivering high quality finishes every time.


We have over 40 years engineering experience, and have built up a highly qualified and experienced team.

project management

Our in-house quality control London building contractors team monitor every aspect of construction insuring completion on time, within budget and to the highest standard.

Heating design

Our build process involves the use of the quality materials installed by skilled tradesmen. We insure completion on time.

Quality Control

Whether you’re fitting an underfloor heating system over we’ll find a perfect solution for any room in your home.
Often Challenged – Never Beaten

As experienced design and build London Building Contractors,   we specialise in school premises, and how they require a unique building contractor to respond to their needs.
Our skilled teams deliver larger refurbishment projects, from moving classrooms to washroom cubicles and facilities.

Check out some of our Previous Projects !

With over 5,000+ Clients and counting, Diligent Developments is the most complete and trusted London building contractors.

Our Projects – Case Studies

London Building Contractors

Free Updates & Expert Advice:

We provide expect advice given by contractors who have studied the subject thoroughly and back up their opinions with a wealth of experience………
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We have published our case studies on the relevant subject area to help you better understand the products of services you may wish to procure.

We hope that these case studies can assist you to plan a more effective and productive project.

Please feel free to comment, engage and improve the body of knowledge for us all..”

 Join Us on Social Media! Let’s See What Some Have To Say.

We love our users ❤️ and are fully dedicated to keeping their trust ✅ by offering amazing updates and outstanding support!

I can’t speak highly enough of Seb and his team, ? who spent four months totally gutting my property and turning it into a show home. ? They aim for perfection, a quality which is hard to find these days, and that’s one of the main reasons I picked them. ?Great job – well done guys and thank you.

Ingrid Ives, Facebook
Seb and the team are awesome. ? Along with the incredible hulk they opened up the back of our house and installed a bifold door… ? and lots of other stuff too❗ Everything was as expected, and Seb was excellent at keeping us up-to-date with progress, photos, and reports. These are the guys you want working in your home.

Dan Martyr, facebook
They have delivered fast⏱️, efficient and friendly service, important for impromptu tenants’ and landlords’ repairs requirements.
This firm is trustworthy✅ and can be relied on to undertake works in the absence of the occupier; frequently the case.?️

Whi Estates, White Estates