New and Custom Built Homes, Granny Flats, Duplexes, Dual Occupancy Developments, Design, Approvals and Project Management – Servicing Newcastle, Central Coast & Hunter Valley

A Family Owned and Operated Business

When you build with P J Cook Building you can expect unrivalled quality, attention to detail and a seamless building journey into the next exciting chapter of your life. Our systematic procedures and meticulous attention to detail set us apart from the rest.

Flexibility in standard design; we invite changes to meet your needs with optional upgrades so you can achieve your own look.


Custom Built One Bedroom Granny Flat In Rutherford

Granny Flats

We pride ourselves on creating innovative granny flat solutions, with clean, modern open plan granny flat designs and the highest quality finishes.

Umina Beach Renovation Rear Exterior

New & Custom Built Homes

P J Cook Building has an established reputation as a new house builder that does much more than just build houses – we create homes.

multi residential development central coast


P J Cook Building works with landowners and property developers to deliver exceptional unit developments, townhouses and duplex building and construction solutions.

Contact our friendly team to organise a free site inspection and quote


“From the initial quote, communications, build to completion – it was perfect! From the initial quote, the team were on time, respectful and even set out the build with pegs for a visual! The build started and was well underway seemingly in an instant.  The quality was exceptional with a true value for money. Peter and the team put in the effort and focus on the detail. The team went above and beyond with the authorities for approvals and complexities with service connections!  We could not be happier with the outcome and credit to the team. With our first baby on the way, the wife and I couldn’t be happier with our stress-free build. We will be recommending PJ Cook to our friends and if the future allows, going again with the team!”

“Peter was extremely professional from the start. Great communication all the way and has certainly been the best thing we ever did to generate a great investment income!  I named our granny flat “Happy Cottage Woy Woy” as it is holiday accommodation and it makes people feel happy.  I would highly recommend PJ Cook builders.”

“Peter Cook Building company have given me a beautiful place to call home. Throughout the whole experience, Peter and his contractors showed their dedication to give me a beautiful final product. I found Peter to be a man of integrity, always communicating with me to check in with regular updates throughout the build. I highly recommend Peter Cook, if you are thinking about building a granny flat. He will help you to have your dream home. Many thanks Peter.”

“We are very happy with our 2 bedroom backyard granny flat from PJ Cook. The built started just when Covid restrictions happened so we were a bit apprehensive but there was no delay. What a professional team – from the planning phase to the finished product. This was a bit of a tricky built because we have a battle-axe property but it didn’t seem to be a problem for Peter and his team. The granny flat solved our problem of a growing family and also is a really good investment down the track.”

“We presented Peter and his team with a small and challenging backyard to construct a custom-made granny flat. Today we have a first-class construction with quality apparent throughout. We recommend you contact P J Cook Building to discuss your needs.”

Contact the friendly PJ Cook team today to learn more about Granny Flat investments, New Home Construction, our build process and company values.

We’re here to give you open, honest and transparent advice and quotes!

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The Essential Guide To Granny Flat Pricing

At P J Cook Building, we take pride in providing upfront pricing for your new home or investment, so there are no hidden fees or surprises after signing our building contracts. Unfortunately, it is not always like that across the industry. We have developed this essential guide to granny flat pricing so you can make an informed decision about the builder that offers the best value for [...]

Granny Flat Construction Guide

Step-By-Step Guide On How Long It Takes To Build A Granny Flat One of the best things about partnering with P J Cook Building is that we manage the entire process. From initial quote through to design, planning, approvals and construction – everything is managed by us. You can count on our industry knowledge and 20-year track record for a smooth process and enjoyable building experience. [...]

Granny Flat Design Process

Step-By-Step Design & Tender Process It’s never been easier to build a granny flat! At P J Cook Building, we are focused on ensuring our clients’ building experience is as simple and enjoyable as possible. Your P J Cook granny flat can be finished in just 13-15 weeks once the site is established. Our leading-edge cloud-based software keeps you informed and updated throughout the build. [...]

Financing A Granny Flat

You are no doubt wondering: “Can I afford a granny flat?” We cannot answer that for you as everybody’s circumstances are different, however, we have developed a network of brokers who can assess your individual situation and guide you through the process of applying for finance. In the meantime, the information below will answer some common questions about financing granny flats. FIRSTLY, HOW MUCH DOES IT [...]

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