Construction Company London | Award Winning Building Company London

With over 45 years of experience and a love of our craft Jeffery and Wilkes are passionate about ensuring we create your dream home in London.

Every job we undertake is completed to the highest standard as you would expect from a professional construction company with such vast experience.

So, whether you're looking for a home extension for greater living space or you're converting your loft into an office in your London property, you can be sure that you are working with the construction industry leaders.

Our passion is creating inspired spaces for you to enjoy with your family, friends, and colleagues.

View our work

// Spaces to grow

House Extensions London

Create living spaces that are in harmony with your lifestyle. Extensions provide the scope to reconfigure your home and positively change the way you live.


// Bespoke Building

Building Contractors London

Jeffery and Wilkes are one of the leading building contractors in London. The services that we specialise in are house extensions, loft conversions and refurbishments for high-end properties across London.


// Concept to Completion

Design and Build London

The design of your refurbishment is crucial. If the design is wrong, then the actual build could go wrong too, and you certainly will not achieve the end result that you require.


// Spaces to live

House Renovations London

A shiny new kitchen or bathroom, a colour scheme makeover, or a better use of natural light can all dramatically transform your living or work space.


// Spaces to breathe

Loft Conversions London

Unlock the treasure trove of additional space that’s hidden away in your loft. Ideal for growing families and people working from home.


// space for communities

Commercial Building Contracts

We care about our clients and the communities we work in. Our goals are to enhance the architectural landscape and create happy and safe environments with minimal disruption to the public.


// Experts In Our Craft

Builders London

Choosing the right builder for your project will make all the difference in experiencing a seamless process with a top quality finish or having a stressful time with endless problems.


What Makes Jeffery and Wilkes Different From The Other Construction Companies in London?

Jeffery and Wilkes are a leading London construction company specialising in the design and build of residential and commercial properties including house extensions, loft conversions, refurbishments, basement conversions etc

Based in the heart of London in Kensington, the team at Jeffery and Wilkes have an unrivalled reputation for being a construction company who consistently deliver high quality projects right the way from consultation to design and completion.

The thing that makes London so unique from other cities around the world is the construction of its architecture and history. Just looking at the various residences people live in throughout London you will notice the houses were built in different time periods, from the unique Edwardian houses to the stylish Victorian terraced houses right the way through to the modern architecture that is being added to new properties in London today.

London has always taken pride in its construction and development and its important construction companies continue to take pride in their work and deliver top quality design and build projects to preserve our unique city.

Jeffery and Wilkes are proud to be experts in the London construction market and will ensure right from the initial design stage that we will factor in the unique character and design of your London property and ensure the extension or refurbishment will enhance and not detract the original features. We’re proud of our reviews that we have built up through the years, please refer to our google reviews.

We have an eye for detail and have the expertise and experience to guide you every step of the way through your project. Unlike many other construction companies, we can offer a full end to end service started with the design, right the way through to completion and anything in between.

Sometimes it can be difficult knowing how to layout and design your extension or loft conversion. One of our office design team will listen attentively to your needs and come up with a bespoke design we believe we fit your requirements. We can do all planning applications etc on your behalf so you can focus on the fun bits, deciding style and colours for your London property.

If you already have drawings though, that is not a problem we can carry out the build side of the project.

Jeffery and Wilkes consistently deliver high quality projects on time and within budget throughout London and particularly West London.

Using our finest trades and craftsmen our company aims to deliver a stylish, elegant solution for your construction needs.

As a professional construction company, we assign an experienced Project Manager to each of our projects that will ensure everything run smoothly.

What Next?

Perhaps you have a property in London you know hasn’t reached its full potential, what construction work could you have done that will add maximum value and to create your dream home?
In London, home improvements can add significant value to a property, not to mention the lifestyle and enjoyment benefits.
Take our home assessment quiz which will evaluate your property.
You will be emailed a detailed personalised report with options to consider how you can unlock your home’s full potential.


If you have a construction project in London you need completed, look no further than Jeffery and Wilkes.

Our team will take care of your each step of the way to design and build your perfect home in London

What Will You Find On Our Company Website?

What We Do

We start by showing you what we as a company do. We break down the various construction projects we undertake throughout London

From home extensions, loft conversions, refurbishments. Perhaps you are not ready for the construction part yet and just want the design to see if it is feasible for your London property?

Design Services

Then check out our design services. Whether you are looking for architectural drawings, technical, structural calculations, party wall survey, quantity survey or a 3d drawings we offer them all in-house.

Our prices are highlight competitive for our design services, you will find them hard to beat in London. You are welcome to use just one of our design services or the full service package.


Across London, prices can vary quite a lot for house extensions, loft conversions and other renovations but our cost page will give you a guide of what our prices start from.

Jeffery and Wilkes Story

Who are we? Where did it all begin? Find out how we became a leading construction company in London

How We Work

Then discover how we work. There are many construction companies in London but we definitely do not all work the same, so have a look at our thorough process and how we will guide you through your project.


Jeffery and Wilkes have constructed hundreds of projects both residential and commercial across London from House extensions, loft conversions and basements to full refurbishments and converting large properties into flats.

Here in our portfolio we provide just a sample of our completed jobs in or near London


Our blog is packed full of helpful articles regarding updates in the construction industry, properties in the London market and how much return you can get on investing in your London home and inspiring design ideas to help you plan the perfect project.


Then its everything you need to know about getting in contact with us.

Our companies address in Kensington, London our phone numbers, email addresses and anything else you need to get in touch with Jeffery and Wilkes, a leading design and build firm in London.