About Us:

In October 2010, two of the founding partners of B J Builders Group retired from the business after 30 years of service. Martin Christmas the remaining Managing Partner continues to run the business under the new name of BJ Building Services Ltd.

We are your local builder for St Albans, Harpenden, Redbourn, Wheathampstead, Sandridge, Welwyn Garden City, Hatfield, Watford, Slip End, and all surrounding areas within an approximate 20 mile radius of St Albans.

We offer a variety of quality building works to meet your needs.   We operate across the private, public and corporate sectors, our team of highly experienced, multi-skilled tradesmen is happy to help.

From reactive property maintenance on offices and schools, to simple home improvements, BJ Building Services offers a complete building works service employing the following trades:

–   Carpenter
–   Electrician (NICEIC reg)
–   Plumber/drainage
–   Plasterer
–   Tiler
–   Bricklayer
–   Groundworker
–   Painter and decorator
–   Roofer
–   Disabled adaptations
–   Extensions/loft conversions
–   Refurbishments
–   Garage conversion
–   Windows (FENSA reg.)
–   Cladding/fascias/guttering 

Building Works

With all aspects of building works undertaken, BJ Building Services Ltd can oversee your job from the beginning stages right through to its completion.

Employing a wealth of fully qualified tradesmen including plumbers, electricians, carpenters, plasterers and bricklayers we can offer a wholly inclusive service, saving you the bother of calling in further workmen and organising complicated schedules.

Be they internal or external building works, for the private, public or corporate sector, BJ Building Services Ltd has the required skills and experience to tackle your project.

Building Maintenance

 BJ Building Services Ltd carries out reactive maintenance for the corporate, public and private sectors.

 Providing emergency support around the clock for both our corporate and public sector clients, you can rest assured that your problem is our problem, even out of hours.

 BJ Building Services Ltd actively employs multi-trade staff, reducing time spent on jobs and therefore offering you the best value for money. This also leads to less resident disruption, eliminating the need to call in a number of different tradesmen.

From a large double-storey extension to disabled adaptations, or the installation of a new kitchen or bathroom, our team of friendly and reliable operatives will provide you with the highest quality service.


With a nationwide obsession for home improvements we spend a considerable amount of time and energy decorating our property. With such constant upkeep there comes a time when even the most hardened DIY enthusiast will call for help.

Our team of skilled painters and decorators can handle all of your decorating jobs both interior and exterior.

With everything taken care of from the tedious preparation of walls and woodwork to that final touch of paint, our efficient tradesmen will work quickly with minimum disruption to your household.

Social Housing

We carry out social housing repairs and maintenance for a number of key customers including St Albans City & District Council, Anchor Housing Trust and Herts County Council. 

Our use of multi-skilled tradesmen means a quick turn around, particularly beneficial when it comes to working on empty properties, ensuring they are left unoccupied for the least amount of time.

We also carry out repairs and maintenance to properties including public conveniences, allotments and cemeteries and have a close working relationship with several local schools.

If you are a public sector organisation and are interested in partnering with us to carry out your repairs and maintenance, please feel free to

Disabled Adaptations

Specialists in disabled adaptations, we can help with a variety of disability works including bathroom alterations, level access showers, access ramps and handrails and door widening. For more information about our work in this field, please click here.

Environmentally aware, BJ Building Services Ltd continuously seeks suppliers with a green policy. We are also proud to employ local staff with intimate knowledge of the area and its resources, helping us maintain a lower carbon footprint.

Based in St Albans, Hertfordshire, we have been trading for over 30 years and carry out building works across the south-east of England. All of our tradesmen are CRB checked, drive liveried vehicles and carry identification, ensuring your peace of mind at all times.

Passionate about what we do and how we do it, quality of service is paramount. BJ Building Services Ltd are committed to ensuring high industry standards are maintained and are members of the Hertfordshire Trustmark Scheme and Guild of Mastercraftsmen. We are also FENSA and NICEIC registered and are proud to have Constructionline accreditation

Mechanical & Electrical Installation Solutions

Enviromech is renowned for delivering quality Mechanical and Electrical solutions across projects in the United Kingdom. The team at Enviromech have helped drive the growth of the company to achieve high standards and our commitment to quality is truly unrivalled.

Quality Mechanical & Electrical Solutions


As a team, we are proud of the work we have successfully delivered for our clients over the years we are continuously looking forward and developing our project work to provide more sustainable and innovative solutions to our customers.

We are committed to providing sustainable solutions and where possible we help clients design and work towards net zero carbon solutions.We operate in a variety of sectors including commercial, residential, railway, hospitality and education.

Mechanical & Electrical Installation Solutions


Enviromech work across the full range of Mechanical & Electrical design and installation services, on both new build and refurbishment projects.


The success of Caelli is built upon the strongest of foundations. Established over 42 years ago and with more than 500 employees, we thrive on the opportunity to invest in the future of Victoria’s Construction Industry through our involvement with industry leading clients.

Our highly-skilled team, consisting of carpenters, concreters, plant operators, manufacturers and labourers, all combine to create the finest and innovative designs in retail, commercial and residential builds.


Having remained a key force in the building industry for over 40 years, and with over 500 employees skilled in such trades as Carpentry, Concreting, Steelfixing, Crane Operations, Concrete Pumping, Welding and Manufacturing, Caelli Constructions are able to deliver quality products and services to some of the most successful and influential Builders in Australia.

As a result of these years of experience, Caelli Constructions currently operate systems that are tailored to suit each individual project, all administered by Supervisors and Staff with extensive dynamic building knowledge.

Caelli Constructions link all current project sites with our company database, enabling staff to access an extensive wealth of online company developed information, transmit and receive documentation electronically with the relevant project Builder, and keep abreast of the current industry developments and safety alerts.

We have a strong commitment to Occupational Health and Safety, and currently operate and maintain a specific Company Safety Management System, whilst working in close association with the Worksafe Regulatory body, to achieve optimum safety performance.

This System is amended and constantly assessed by OH&S Management Staff in order to be job specific and to meet, or exceed, the current related Occupational Health and Safety Regulations.

Caelli Constructions maintain a strong work ethic, delivering projects on time by developing work systems that assist in achieving or exceeding expected completion dates. Inevitably projects may experience a wide array of delays, for example, inclement weather or industrial action, however, with our strong and committed workforce you can be assured that we will always endeavour to complete projects on time.

We operate a fully equipped manufacturing facility. This manufacturing division is capable of designing and producing specialized formwork systems such as edge protections screens, table forms and self-climbing wall shutters. All designs are produced using Computer Aided Drafting Software.

Here at Caelli Constructions we are proud of our innovative work practices and have achieved awards in various fields. These include, National Specialist Contractor of the Year and Excellence in Formwork, including Steelfixing and Concreting.

Who We Are

We are a construction company with over 27 years experience in the Residential & Construction industry.
Offering a range of services to you as the client, we are happy to help where we can.

At ORT Constructions, we are a family operated business who guarantee to meet your expectations and to go above and beyond to ensure every aspect is met. We are highly skilled team and our work is to the highest calibre and to your specifications.

The ORT Construction team is an enthusiastic, driven and hard working business and it shows with every job we do.
We give 100% to every client to achieve the highest standard with our work.

ORT Constructions is qualified and fully insured.

Scroll to Top