• slidebg1
    Additions Specialist
    Servicing the
    Blue Mountains and Penrith region since 1995.
  • 2

  • 3dbg
    Designer Buildings
    Dulux paints and Colourbond metal roofing.
    Framing timbers - H2 treated against termite attack.
    External fasteners - galvanized or stainless steel
    Our decking hardwoods - durability class rating


Our trades people are highly qualified and licensed in their chosen field. Many have worked with us for over ten years. As members of our team they share our companies' continued commitment to quality. The quality of our work is not just a result of a passionate trade team, but our use of quality materials throughout the building process.

Quality control inspections are carried out at all critical stages of the works as standard practice. Compliance with the relevant codes and standards, the buildings' specification and the owner selections are checked.


The process

A standard building process for an addition that requires development approval may include the following steps:

  • Initial consultation
  • Preliminary design drawings
  • Cost estimate
  • Final drawings & documentation
  • Quotation
  • Contract
  • Development Approval, Construction Certificate
  • The Build


After getting the design and finish of your addition right it only makes sense to keep it that way for as long as possible. Proven, durable materials and finishes are used to keep your investment looking good for years to come.

We use and recommend Dulux paints and Colourbond metal roofing. Framing timbers are at least H2 treated against termite attack. External fasteners are either galvanised or stainless steel. Our decking hardwoods have a high durability class rating.

As part of our service we can advise you for the ongoing maintenance of your house.

Clients Testimonials

  • David & Margret Carter

    The high standard of David's work, together with his professional and helpful manner makes him a pleasure to work with and we have no hesitation in recommending him as a highly competent tradesman/builder in extensions & renovations.

  • Dr David Murphy

    From the inception David Porter demonstrated an understanding of our vision, providing valuable advice that facilitated fulfilling our needs and wishes. We utilised his drafting skills resulting in a plan to modify the existing dwelling that in many ways was better than an architect was able to provide in being more insightful to that would work with in the constraints of the existing building structure and guidance as to what fundamentally looks good.

  • J. R. Lawson

    Addington Constructions completed major extensions to our external renovation to our property in Glenbrook. All Work was completed within agreed times and according to budget; variations were explained and options discussed before being undertaken. The quality of the completed work was of a very high standard and we will use the services of Addington Constructions in the future.
    As parents we were particularly impressed with the consideration shown by Mr Porter and his staff both with the regard to minimising disruptions to our household routines and their friendly and patient manner when dealing with our children.
    We would not hesitate to recommend Addington Constructions to anybody considering building extensions.

  • Tony Chenchow

    Chenchow + Little Architects and Interior Designers.

    Mr Porter of Addington Constructions P/L was engaged by my client on a cost plus basis to build an extension to an existing dwelling in the Blue Mountains. The project was of a highly detailed nature and therefore required a skilled builder. Mr Porter completed the project successfully, within time and on budget. On this project I found Mr Porter and his team of skilled tradesman to be professional, diligent and fastidious. I would gladly recommend Mr Porter and Addington Constructions P/L for projects of a similar nature.

  • Sir Anthony Mason.

    In his capacity as a builder, I was very impressed by David Porter's work. He has built extensions to my house at Wentworth Falls and these were done with meticulous care. He was able to call on excellent workmen as part of his team and the work was done in good time and left clean and neat.
    I can strongly recommend David Porter.

  • Colin Jacobson

    Working with David was as near hassle free as any building project can get. He was extremely professional , very quality conscious and expected the highest standard from his workmen. David also has a good sense of humour.
    David is a dependable builder who has an excellent knowledge of building systems and stands by his workmanship. I have no hesitation in recommending him as a quality builder.