Domestic Builders Northampton

Make your house a home with builders you can trust

We are an established family builders who offer straightforward, honest and friendly advice, backed up with quality workmanship.

Federation of Master Builders
High quality building delivered on time and on budget

Choosing the right building company or tradesmen can be a difficult task. That's why we offer straightforward, honest and friendly advice, backed up with quality workmanship. Based out of Northampton, we are centrally located so no distance is too far to travel including Milton Keynes, Bedford, Wellingborough, Kettering and Daventry.

For extra peace of mind we are proud members of the Federation of Master Builders where all members are carefully vetted before they are allowed to join and are required to adhere to a strict code of practice. For more information see the Federation of Master Builders website.

New Builds & Extensions
Complete Design & Build Solution

If you're looking for a new build house or an extension, ATJ Builders of Northampton can cater for all your needs. All building works are undertaken including complete new builds and alterations.

We have extensive experience in making major alterations including supporting entire buildings and installing structural steels to demolishing supporting walls.

ATJ Building & Groundworks also offer a FREE architectural design if we undertake both the design & build of your project.

LOft Conversion
Giving you room to grow

Loft conversions are becoming more and more popular and are often a more cost effective option when looking to extend your property. A loft conversion can create that much needed extra bedroom, study or playroom and with the wide variety of options available we can guarantee the perfect solution to suit your needs including:

Suitable for when the existing loft space is of insufficient size for the proposed conversion. It creates additional headroom for the staircase and space required and is particularly useful if looking to create an additional bathroom as it will increase the height above fittings.

Recommended for those contemplating the smaller loft conversion, perhaps for a single bedroom or study. As the necessary height is already available within the existing loft space, roof lights can be installed with minimum disruption.

Hipp to Gable
In this type of conversion the hip roof is replaced with gable ends which greatly increases the usable floor space and height around the sides of the property where the hips once were.

ATJ Building & Groundworks
The Perfect Choice for your loft conversion
High Quality Building
Free Consultation
We offer all of our clients a free consultation visit where we will determine the feasibility of a loft conversion and the potential floor space. There needs to be a minimum of 2.4m floor to ceil measurement to meet current building regulations, which can be created by lowering ceils on the floor below.
Customer Satisfaction
Design & Planning
Once we have confirmed your requirements we will take your ideas and work with you to put them into the design and floor plan. On your approval of the design we will apply to the local authority for planning permission (if needed) and building regulations. Depending on the type of consent required, work could then begin in as little as 2-3 weeks from the submission of drawings.
Master Builders
Depending on the extent of work to be carried out, loft conversions usually take around 8 weeks to complete and we will aim to ensure minimal disturbance to you and the existing property throughout this time.
Experienced Northampton Based Builders
Experienced Northampton
based Builders
With ATJ Building & Groundworks you can be assured that all work is undertaken by a qualified and highly skilled workforce and our tradesmen are qualified or NICEIC, Gas Safe approved.
Family Run Business
Established family
run business
Founded in 2006, we have an exceptional reputation for quality and professionalism. To maintain our high standards, we don’t sub-contract work out to other builders.
Customer Satisfaction
Highest levels of service
and satisfaction
Our experience, technical expertise and team of highly skilled craftsmen enable us to provide you with the stress-free experience you would expect from the best builders.
ATJ LifeStyle
Bring your imagination to life

We are pleased to offer a wide choice when it comes to extending and improving your home.  Whether you are looking for a traditional conservatory or a contemporary glass extension we can design, plan and deliver the perfect addition to your home no matter what style, taste and function you require.

There are many styles of home extensions and improvements to choose from or you could combine a range of design features to make something totally unique to you and your home.

Our technical expertise and team of highly skilled craftsmen enable us to provide sophisticated and efficient installations, tailor-made to your needs.

Bring your imagination to life with beautiful bespoke energy saving conservatories, orangeries, windows & doors including:

  • Conservatories
  • Orangeries
  • Sun rooms
  • Garden rooms
  • Livin rooms
  • Porches
  • Windows & doors
  • Bi-fold doors
Foundations & Underpinning
Adding depth to a buildings footings

Underpinning is required when a building is subsiding or suffering from ground heave. Underpinning can also be used to enable basement construction by adding depth to the building’s original footings.

The success of any underpinning project is determined by the contractors carrying out the work. In most cases, once the work is completed it is back-filled again within a few days, so it is imperative the work is undertaken by a competent, trustworthy contractor.

ATJ Building and Groundworks ensure all work is undertaken by highly trained and experienced staff who are fully supervised to guarantee our high level of workmanship is maintained.

We mostly undertake traditionally excavated underpinning but can work to any engineer's drawings.

supporting with steel

Much of our alteration work involves supporting upper floors and often, entire buildings.

This is an area we excel in due to our extensive experience and one project to note is the Latimer and Crick building in Northampton. This project involved supporting a 3-storey building whilst installing steels to allow the ground floor walls to be taken out for underground parking.

Other alteration work includes:

  • New openings
  • Steel installations
  • Chimney breast removal

ATJ Building & Groundworks

Happy Domestic Customers
ATJ Building & Groundworks
Want to make a start on your project?