AJI Builders is an experienced building contractor for Herts, Beds & Bucks.  Owned by Andrew Innes and son. Working in St Albans, Harpenden, Milton Keynes, London, Covering all areas of Herts, Beds & Bucks. 

Our company covers all aspects of construction, with a focus on small, medium and large extensions and conversions, residential new build houses and loft conversions.   My approach is to be direct and hands-on with the business and my customers' projects. With 36 years of expertise and knowledge from a tradesman’s perspective, we've built a large portfolio of successful projects.
I am a time-served carpenter who started in the industry during the 1980’s. In 1994 I began renovating flats and houses for property investment companies and refurbishing properties for wealthy overseas customers. By 1997 I had built my first house and still continue to build new houses as well as extensions for clients.

Once we’re on your build we stay, every day (excluding weekends), until completion.  Stage payments and no making on materials. 

AJI Builders can take complete care of your build from planning approval through to the final touches or, if you prefer, we can project manage your build for you. I believe that few companies offer the same service as AJI Builders due to our experience, knowledge and attention to detail. We strive to get the best result, on time and on budget for every project that we undertake. 
new build houses 
loft conversions
all types of carpentry
all aspects of brickwork, plasterwork, roofing, plumbing and electrical
all groundworks and drainage
Area covered: Herts, Beds, Bucks, Oxfordshire & North London 

Trades offered

Builder general
Garage Buildings/Garage Doors
Patios and Driveways
Block Paving
Loft conversions
Home office
Barn Conversions
Garage conversions
Basement/Cellar conversions
General extension
Bathroom tiling
Bathroom fitter
Wet rooms
Brick work
Windows, Doors and Conservatories
Bifold doors
Crittall windows
Double glazing
Carpenter and Joiner
General carpentry
Timber Frame Specialist
Door fitting/hanging
Asphalt Roofing
House Builder
Custom/Self Build
New build
Formwork & Shuttering
Liquid screeding
Coving / Moulding
Wood floor laying
Floor repair
Floor sanding / polishing
Laminate floor laying
Kitchen tiling
Kitchen installation
Kitchen worktops

Case studies

Two storey side and rear extension with loft conversion

  • 16 Jan 2023
  • St. albans

Two storey side & rear extension in Luton.

  • 16 Jan 2023
  • Luton

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Customer testimonials

02 Mar 2023

I have to say I consider myself very fortunate to have contracted Andrew Innes and his team to build me a replacement double garage. The work was completed ahead of schedule, at the agreed price, including repairs to the fabric of the property that were not included in the original plan but were generously accommodated.. They arrived promptly every day and worked conscientiously throughout the project. At all times respectful of the area surrounding the build, it was a pleasure to have them working on my property and to make their acquaintance. Their work is first class and has been complimented by a retired master builder and sometimes other tradesmen can be the harshest critics. I wouldn't hesitate to recommend them and anybody employing them won't be disappointed. Thank you very much AJI Builders. - Barrie D Jones

7 Drayton Road, newton Longville

15 Sep 2022

Andy and his team completed our extension in the summer of 2020 and we were very impressed by their workmanship and attention to detail. The work was completed on time and within budget and Andy was always happy to keep us informed of progress and provided excellent advice. Every member of Andy’s team were hardworking, highly skilled and approachable and we are very pleased will all aspects of the project. We have no hesitation in recommending Andy. - Nick & Catherine Phillips

St Albans

14 Sep 2022

Andy and his team completed a double storey side & back extension, a loft conversion and built a garden room for me and I cannot recommend them highly enough. The workmanship was excellent, they are all very friendly, polite and I am particularly impressed with their attention to detail. They were here on time everyday and always answer and address my questions. I am very happy with the result. Brilliant throughout! - MH

St albans

01 Sep 2022

AJI Builders are an exceptional company headed by Andrew Innes ,my work was completed on schedule and to the highest standards l believe possible,they are 100%hardworking trustworthy reliable punctual tidy and really important charge such reasonable rates .I could not recommend a better company for all your Building requirements AJI are simply the best in my opinion.Thankyou Andrew and your Team for your hard work and for building me my beautiful dream home 🏡 - Vivien Walker


30 Aug 2022

Andy and his team did a great job building a large and complex single-storey extension on our home. Their attention to detail was commendable and they were very polite, friendly and flexible. We have no hesitation in recommending them. - Mr & Mrs W, Aylesbury, Bucks


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