Beautiful, spacious, Home Extension

Delivered ontim and on budget. A stunning family space

Beautiful, spacious, Home Extension

Delivered ontim and on budget. A stunning family space

House Extension Experts | Design & Build House Extension Company London

London’s Leading Home Extension Specialist

We Are Here To Serve You

Theres no need to move, when you can improve. There are a variety of excellent home extensions available to you that can enhance both the aesthetic and monetary value of your home.

Whether you need a ground floor bathroom for elderly or mobility impaired person, a swanky new kitchen, more bedrooms or extra living room space, we’re ready to provide you with a complete design and build home extensions service.

Our Services

Diligent Developments Design & Build is one of London’s finest loft conversion specialists. With hundreds of exquisitely designed and impeccably finished loft conversions completed throughout the capital over the last decade, you can be sure that when it comes to innovation, craftsmanship and care, there are no better loft conversions in London than those created by Diligent Developments.

If you’re looking to extend upwards into your roof space to add an elegant new master bedroom with en suite, a light and airy art studio, a home office or a playroom for the kids… If you want the sun to stream in through generous double aspect Velux windows, a floor to ceiling glazed wall or through the doors to your balcony… If you need extra head height, space at home or somewhere to escape to for a little relaxed ‘me’ time… Then our team of skilled architects, interior designers and tradespeople will make it happen.

If you are looking for a firm to build you a luxurious basement conversion in London, to extend downwards to create an entertainment space, a cinema room, a home office or an entire new storey for your London home, then you’ll want to choose the best – a basement construction company with years of experience and hundreds of satisfied clients – you’ll want to choose Diligent Developments Design & Build.

London: 8 million people squeezed into just over 600 square miles – no wonder it can sometimes feel cramped. With very little space to extend outwards and restrictions on extending upwards, if you love your home too much to move but need the extra floor space it may be time to consider a basement conversion. We’re not going to lie, a basement conversion can be costly and time-consuming to construct, however, the end results can be magnificent. From a small wine cellar maintained at the perfect temperature and lined with floor to ceiling racks to an entire additional storey styled from floor to ceiling to be every bit as stunning as the home above, and everything in-between, our team have designed and built them all.

Building the most exquisite house extensions in London requires two fundamental ingredients – a client with a dream and the right team of architects, builders and interior designers to make that dream a marble-edged, fabric-matched, open-plan, high-tech, bi-fold lit reality. Proficiency Design & Build have just such a team, so, what are your property extension dreams?
Don’t move out, move outwards. If you have outgrown your home then extend. Today it’s far easier than ever before to build the stylish kitchen extension, fully equipped home gym, orangery relaxation room or open-plan entertaining space for family meals and parties with friends without limits. Combine this with a refurbishment of the rest of your home and you could live somewhere completely new without having to move.
Diligent Developments Design & Build are luxury home renovation specialists – a team of highly skilled architects, interior designers, builders and tradespeople all dedicated to ensuring that your home becomes every inch the dream home you’re after. So, if your project involves an apartment or house renovation in London and you’re looking for a team with an eye for detail, a passion for precision and a commitment to quality of finish, then contact us today.

You’ve worked all your life to get here… the home you’ve found or live in is perfect for its location, scale, features or outlook, but there’s work to be done for it to become the dream home you imagined it could be. No matter where you look in London, renovation work is going on – space is at a premium and moving is costly, so that’s where a refurbishment company like ours comes in. Proficiency is a London refurbishment specialist – we understand the city market and the demands of a very specific type of clientele who have trusted us to design and style their homes for a decade.

House Extension Design

Don’t move out, move outwards. If you have outgrown your home then extend. Today it’s far easier than ever before to build the stylish kitchen extension, fully equipped home gym, orangery relaxation room or open-plan entertaining space for family meals and parties with friends without limits. Combine this with a refurbishment of the rest of your home and you could live somewhere completely new without having to move.

House Extension Builders

Some extension builders just build, others use their decades of experience building property extensions in London and their depth of knowledge in property markets, planning authorities, challenges and solutions, materials, technologies and trends to guide you from start to finish on your project. So, whether your property is in south or north London, whether you have grand plans or more modest extension aspirations, our team will go on your house extension journey with you, from end to end.

House Extension Experts

We are the Leading House Extension Experts in London. We have all the skills necessary to give your bathroom a polished and professional finish. Affordable Prices. Exceptional Service Guaranteed from Diligent House Extension Experts Team.

GET STARTED

0$

Thanks, we will contact you soon

What type of job do you need?

You need to select an item to continue

NEXT STEP

Your job

You've Selected

[item-899_value]

You need to select an item to continue

NEXT STEP

You contact details

You need to select an item to continue

NEXT STEP

Timing




You need to select an item to continue

NEXT STEP

You contact

Summary

DescriptionInformationQuantityPrice
Discount :
Total :

ORDER

READY TO GET A QUOTE?

GET STARTED

Our Process: London #1 Leading Home Extension Specialist

With over 1000 Residential Home Improvements and Commercial Building Services, including home extensions & loft conversions, basement tanking and waterproofing, kitchen and bathrooms.

On-Site Assessment

Our on-site assessment is a thorough review of your house extension aspirations, the structural characteristics of your home and the feasibility of your plans.

On-Site Assessment

Our on-site assessment is a thorough review of your house extension aspirations, the structural characteristics of your home and the feasibility of your plans.

Planning Permission

Not all extensions require planning permissions, but all extension builders in London need to be aware of the possibility of local authority consent being required and the best way to gain approval for you.

We Offer Solutions

Not all extensions require planning permissions, but all extension builders in London need to be aware of the possibility of local authority consent being required and the best way to gain approval for you.

Party Wall Agreement

If your extension is to be built anywhere near our neighbour’s boundary it may well be worth asking our team whether you’ll need a party wall agreement. If you do, we can help you trough this process.

Party Wall Agreement

If your extension is to be built anywhere near our neighbour’s boundary it may well be worth asking our team whether you’ll need a party wall agreement. If you do, we can help you trough this process.

Building Control

From your completion certificate from the local authority’s building control officer to the manufacturer’s documents for all the equipment we install for you, once your build is complete we will provide you with a file containing all your documentation.

Quality Control

From your completion certificate from the local authority’s building control officer to the manufacturer’s documents for all the equipment we install for you, once your build is complete we will provide you with a file containing all your documentation.

How Much Does an Extension Cost?

Are you planning to extend you home and wondering how much does an extension cost?

There are lots of factors that’ll impact your extension costs — how far you’re going to build up and out, the quality of the build that your budget can stretch to and how much involvement you’ll have in managing the project.

Depending where you are in the UK, the cost of a straightforward extension should allow for around £1,000–£2,000/m². The standard of specification you choose will have an enormous influence on the build cost. On average, an excellent finish is 40% more than a standard finish.

Home Extensions & Rear Extension, Side Extension

SMALL EXTENSIONS
3 X 5 M
£12k – £16k

MEDIUM EXTENSIONS
4 X 6 M
£19k – £26k

LARGE EXTENSIONS
6 X 8 M
£38k – £52k

SMALL EXTENSIONS
3 X 5 M
£16k – £21k

MEDIUM EXTENSIONS
4 X 6 M
£26k – £34k

LARGE EXTENSIONS
6 X 8 M
£52k – £67k

SMALL EXTENSIONS
3 X 5 M
£21k – £30k

MEDIUM EXTENSIONS
4 X 6 M
£34k – £48k

LARGE EXTENSIONS
6 X 8 M
£67k – £100k

* All prices Excluding VAT.  All prices subject to final survey.

Our Projects – Case Studies

Bathroom Refurbishment – Islington 2020

Bathroom Conversion using RSJ Steel Beam

Bathroom Refurbishment, Bathroom Tiling

Bathroom Design

Bathroom Installation

Bathroom Renovation

Bathroom Repairs

Case Study Bathroom – Catford

Case Study Bathroom – Norbury | Croydon

Bathroom Renovation – Balham SW17

Subscribe NOW! Get our free guides

We will only send occasional and useful updates

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..”

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

Contact Us
5/5 (2 Reviews)