40+ Years of Excellence

Home Improvement Contractors: London NO.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.
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View Our Work
design and build
We undertake all responsibilities from architectural design, planning permission and local authority approval.
We Offer Solutions
Our skilled architects work with an in-house team of highly experienced contractors, delivering high quality finishes every time.
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.
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About us

London Building Contractors

We provide expect advice given by contractors who have studied the subject thoroughly and back up their opinions with a wealth of experience………
We can all benefit from expert advice.

1000+ Projects

Licensed & ISO Certified

Experienced Team

What We Do

Our Full-Spectrum Construction Services

Residential Services

We are a highly professional design and build Home Improvement Contractors based in London. For a fraction of the cost of moving house, our team of skilled London building contractors can create quality additional space in your home.
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Commercial Services

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.
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Home Extension

We are a highly professional design and build Home Improvement Contractors based in London. For a fraction of the cost of moving house, our team of skilled London building contractors can create quality additional space in your home.
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Our Projects

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.
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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 experienc. We can all benefit from expert advice. Feel free to comment, and enjoy, with our compliments.
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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!

Residential Construction

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.

customer 1
Ingrid Ives
Facebook
Commercial Project

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.

customer 2
Dan Martyr
Facebook
Renovation

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.?️

customer 3
Whi Estates
Facebook
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Long-Term Reliability

Proven & Trusted

London Building Contractors

We provide expect advice given by contractors who have studied the subject thoroughly and back up their opinions with a wealth of experience………
We can all benefit from expert advice.
Feel free to comment, and enjoy, with our compliments.

100+

Satisfied Clients
Over 100 projects built with trust and excellence.

10 Yrs.

Structural Warranty
Structural coverage & quality you can count on.
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BiFold Doors Installation
Home Extensions
Chimney Breast Removal
Bathroom Refurbishment
Underfloor Heating
Kitchen Contractor
Basement Tanking
Steel Beam Installation

Why Brikly

Those Are Just A Few Our Services, There Are Plenty More

We’re more than just builders — we’re your trusted local partner. From smart design to solid delivery, every detail is handled with care, precision, and pride.

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We’re Here to Help

Diligent Developments – Contact

Tell us about your project ideas or just say hello. Whether you’ve got a big idea or need some inspiration with a building project, we are here to create perfect buildings. From concept to creation, let us inspire you.

260+ reviews (4.95 of 5)

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