
ATJ Building and Groundworks offer a full range of building services in and around the Northampton area including Milton Keynes, Bedford, Wellingborough, Kettering and Daventry. Choosing the right building company or tradesmen can be a difficult and task. That's why we offer straight-forward, honest, friendly advice backed up with quality workmanship.
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 which can be found on their web site.

All building working is undertaken from complete builds and alterations to impact damage. We have extensive experience in making major alterations such as supporting entire buildings and installing structural steels to demolishing supporting walls.
A recent example of this is at Front Street, Arnold, Nottingham. We supported the upper floors and installed 9 pairs of spliced beams anchor to the walls - under a central row of spliced beams, to demolish a supporting wall and make 1 larger retail unit out of 2.
Free Consultation Visit
Not all of our clients already obtain planning permission before they come to us so we offer a free consultation visit where we listen to your ideas and requirements and discuss with you the most suitable cost effective extension for you and your property. We the then provide you with an estimated cost of your build based on our vist.
Planning
If you decide to proceed we provide a *free Design & Planning Service and can apply to the local authority for planning permission approval and building regulations on you behalf of you can appoint an architect.
In some instances planning permission isn't always required and work can begin as quickly as 2-3 weeks.
Once drawings have been finalised and planning process underway we will provide you with a full specification and fixed quotation valid for 90 days.
Installation
Whatever the size or scope of the work you can be assured that you will have a full time project manager / supervisor on site at all times and work will be under taken by a highly skilled, experienced work force. All our tradesmen and appointed contractors are fully qualified or NICEIC, Gas Safe approved.
Some of the most common alteration work we do involves supporting upper floors or even entire buildings.
We have extensive experience in this particular aspect of building work. One project to note is the Latimer and Crick building in Northampton where we supported a 3 storey building whilst installing steels to allow the ground floor walls to be taken out for parking under the building.
All types of ground work is undertaken, we have all relevant CPCS qualifications to enable us to operate plant. We can provide labour and all plant necessary to undertaken any groundwork task like :
For More information about Block Paving please visit our dedicated page.
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 buildings original footings.
The success of any underpinning project is determined by the contractors carrying out the work; in most cases once the work is complete it is back-filled again within a few days so it is imperative that the work is undertaken by a competent, trustworthy contractor. All work is undertaken by highly trained and experienced staff who are fully supervised to ensure our high level of workmanship is maintained.
We mostly undertake traditionally excavated underpinning but can work to any engineer's drawings.
All Types or brick and stone work are undertaken. We have extensive experience of factory and barn conversions. Detailed and complex brickwork is especially welcomed. Please look through our gallery of photos to see some examples of this.
Loft Conversions are become more and more popular and are some times a more cost effective option than extending out. If it’s a bigger kitchen you need obviously a loft extension isn’t the answer however, bedrooms, studies, bathrooms and playrooms work beautifully in loft conversions. There are many different kinds of loft conversions which can be utilised on there own or combined to suit you the clients needs, the types being:
Dormer
This option is where the existing loft space is of insufficient size for the proposed conversion, it creates additional headroom for the staircase and new room or rooms contemplated. If an additional bathroom is proposed along with the rooms the increased height created by the Dormer provides additional height above the fittings.
Rooflight/Velux™
This option is generally adequate for those contemplating the smaller loft conversion, generally for a single bedroom; study etc, where adequate height is available within the existing loft space. Rooflights can then be installed with a minimum of disruption.
Hipp to gable
This type of conversion is where a hip roof is replaced with gable ends greatly increase the usable floor space and height around the sides of the property where the hips once were.
Free Consultation & Design Visit
We offer a free consultation visit where we firstly determine the feasibility of a loft conversion and the potential floor space. There has to be a minimum of 2.4m floor to ceils measurement to meet current building regulations, if not it can be created by lowering ceils on the floor below. We will then take you ideas and requirements and work with you to put them in to the design and floor plan.
Planning
On your approval of the design will apply to the local authority for planning permission (if needed) and building regulations, depending on which type of consent required work could begin as soon as 2-3 weeks from submission of drawings.
Installation
Depending on the extent of work to be carried out loft extensions usually take around 8 weeks. We try to ensure minimal disturbance to you and the existing property however converting a loft to a habitable space usually means installing RSJ’s to carry new floor joist and the roof if changing the existing structure. So by the very nature of the job some disturbance is expected. However you can be assured that work will be under taken by a qualified and highly skilled work force With minium disturbance and inconvience to you client. All our tradesmen and appointed contractors are fully qualified or NICEIC, Gas Safe approved.