Duplex Development In Booker Bay, Central Coast

Maximising Property Value with a High-Quality Duplex Build

This duplex development in Booker Bay, Central Coast, was designed and built for a pair of local investors who wanted to maximise the potential of their property. By knocking down an aging fibro home, they created two high-end dwellings that offered substantial resale value. This project aimed to develop the site and sell both properties for a significant return on investment, which was successfully achieved.

Purchased in December 2016 for $680,000, the completed duplex saw one dwelling sell for $890,000 in January 2018 and the second for $835,000 in October 2018, generating a combined sale total of $1.725 million. The success of this project highlights the value and profit potential of building a duplex compared to renovating an older home.

Duplex Development Floor Plan

Efficient Design & Seamless Construction

The flat block with excellent access allowed for a smooth construction process, free from major site challenges. By leveraging one of our proven duplex designs, we ensured the layout was functional and appealing to buyers and maximised the use of space. This project was completed within 45 weeks, delivering a high-quality, stylish duplex that suited the local market.

Project Details

This modern duplex in Booker Bay was built with premium materials and finishes, offering high-end appeal and long-term durability.

Key Features & Inclusions

Architectural Façade – A combination of brick veneer and Weathertex cladding, complemented by PGH Bricks for a contemporary exterior.
High-Quality Roofing & Exterior Elements – Featuring Bristile Design Range Roof Tiles, Colorbond fascia and gutters, and Gliderol Automatic Surfmist garage doors.
Spacious & Functional Interiors – Both dwellings include three bedrooms, a double garage, a master bedroom with ensuite and walk-in robe, a main bathroom, and a laundry within the garage.
Open-Plan Living & Natural Light – Bi-folding doors open to tiled alfresco areas, enhancing indoor-outdoor flow. A rear unit survey bi-fold window off the kitchen allows for additional light and ventilation.
Luxury Finishes & Fixtures – Kitchens feature a breakfast bar, Polytec melamine gloss cabinetry, 20mm stone benchtops, and Smeg appliances. Bathrooms include floor-to-ceiling tiling, insert baths, and high-quality tapware from Reece Plumbing.
Modern Comfort & Technology – Both dwellings are fitted with ducted air conditioning, plantation shutters, surveillance cameras, and LED downlights for enhanced convenience and security.
Durable & Stylish Flooring – 4.5mm luxury vinyl planks in main living areas, complemented by plush carpeting in bedrooms.
Exterior & Landscaping Works – Brick front boundary fencing with aluminium screening, driveways, kerb, crossover, layback, public paths, fencing, and landscaping, all completed by P J Cook Building.

Before & After Image

Duplex Development Booker Bay, Central Coast Before Image

Duplex Development Booker Bay, Central Coast

Why Dual Occupancy or Duplex is a Smart Investment in Booker Bay

A well-designed duplex offers a superior return on investment, whether for rental income or resale. Compared to a single-dwelling investment, a duplex can generate higher rental yields and greater flexibility for investors.

For example, a single home may rent for $750 per week, while a duplex can generate $600 per unit per week, resulting in an additional $450 in rental income per week. Additionally, duplex developments often see faster capital growth, as they make more efficient use of land while maintaining strong appeal to both owner-occupiers and tenants.

Other investment benefits of a duplex include:

Greater flexibility to sell or lease each dwelling separately.
Lower costs per dwelling compared to building two separate homes.
Stamp duty savings, as investors typically pay duty on the land only.
Appeal to a wider range of buyers, from families to downsizers and investors.

Why Partnering with P J Cook Building is the Best Choice for Your Project

As a leading duplex builder in the Central Coast, Newcastle, and Hunter Valley, P J Cook Building offers custom and pre-designed floor plans that maximise both space and investment returns. We provide:

End-to-end project management, including design, approvals, and construction.
High-quality workmanship, working with skilled trades for premium results.
Tailored design solutions, ensuring every duplex suits the block, budget, and buyer market.
Limited site starts each month, ensuring every project receives our full attention.

Start Your Duplex Project Today

If you’re considering a duplex development, talk to the experts at P J Cook Building. We offer free site inspections and quotes and can guide you through the design, approval, and construction process to deliver a high-quality, high-value development.

Contact us today to learn how a duplex can maximise your property’s potential and deliver strong investment returns.

Testimonials

Karenne Jurd
We have recently completed a lovely build with PJCook and we couldn’t be happier – Peter and his whole team are a pleasure to work with. They consistently had an eye to the detail, levering off their successful experience, to improve the delivery for our construction – whether it was site management, finish details, materials pallets, or subcontractor management. Any issues that arose were addressed in a timely, respectful way. We now have two lovely homes (a 2 bedroom and a 3 bedroom), after subdividing a residential block, occupied by happy families. What could be better!
Roger Boyd
PJ Cook Pty Ltd built our Granny Flat and we cannot recommend Peter and the team highly enough. Open and honest communication, an amazingly high quality finish, on time and on budget! A truly simple process and a great investment for the future. We are very happy! Thank you Peter.
Chandan Arun
We had a Granny Flat built py P J Cook Building. We found the whole process transparent. Peter and his team were always available to answer any questions along the way. The building was completed on schedule without and problems . The build quality is excellent with no defects identified. Even our Real Estate agents were impressed with the quality. We can recommend PJ Cook to anyone who is after a quality built dwelling.
Chiara B
PJC built out granny flat in Charmhaven. From the beginning Peter and his team were helpful, quick to respond and very professional. We are so happy with the end product and the whole experience. Highly recommend!
George Chinn
Absolute professionals, PJ Cook, is so easy to deal with, wonderful team lead by Peter. No hassle building, we have a beautiful 2 bedroom granny flat, above our expectation, the finish is spotless, and all communication was quickly answered. We made a great decision going with P J Cook.
Julie Oldham
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.
Elize Smit
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.
Robert Cogswell
P. J. Cook Building. Built a 2 bed Granny Flat in our backyard at Chain Valley Bay. The project finished on time and without any additional expenses This was extraordinary considering the pandemic. My Wife and I are extremely happy with the finished product. The builders eye for detail is second to none. I wouldn’t hesitate to use this company again. This is one of the best investments we have made. To sum up the experience. Trust, Perfection, Value and Reliability.
Julie Bramall
Thank you to the Team at PJ Cook Building for the build of our Granny Flat on our investment property. Peter was quick to respond to any questions that we had. Once the project got started, it was very quick to completion, especially over the Covid19 period. There were a few hurdles along the way, which had nothing to do with PJ Cook but Peter made this much easier to deal with and we are very appreciative to him.
The finish product of our Granny Flat is impeccable. Peter’s eye for detail is impressive, which has resulted in the most beautiful Granny Flat (inside and out) that I have ever seen. We were able to secure a tenant only 2 days after advertising and for a very impressive return.
Thanks to all the Team at PJ Cook Building and especially Peter. We would not use any other builder if and when we decide to build another.
Jo Minter
I am so very happy with my Granny Flat built by PJ Cook in Woodberry. The whole team onsite were courteous and professional at all times. The quality of my build is impressive. It took me over a year of looking at other builders before settling with PJ Cook. The only disappointment is that the slide out range hood was unobtainable, so I settled for a fixed one. I am sure I can live with that. Absolutely no hesitation to recommend them to anyone looking at building a granny flat. Handover is tomorrow. I am one very excited and happy customer. Jo
Mark Brogan
“Peter and team are first class”.
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!
Tanya Watson
We employed PJ Cook in 2016 to put in a 2 bed granny flat for us.
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
Sturt Family
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.

Duplex Development – Booker Bay, Central Coast