Granny Flats Central Coast
Aesthetically clean, modern open-plan designs from your trusted granny flat builder for granny flats Central Coast, featuring the highest quality finishes.
At P J Cook Building, we are proud to be one of the leading builders of granny flats on the Central Coast. With over 13 years of experience specialising in the design, approval, and construction of granny flats, we have completed thousands of successful projects across the Central Coast region. Our expert team is committed to delivering modern, spacious Granny Flat designs with top-quality finishes that enhance homes and properties throughout the local community.
Adding a granny flat is a smart way to meet the needs of a growing family or generate extra income. Whether you’re looking to create space for loved ones or gain rental revenue, a granny flat offers flexibility and value. Trust the Central Coast’s Granny Flat experts to bring your vision to life with a focus on craftsmanship and quality. Let us help you add value and versatility to your property!
Check out our range of granny flat designs!
Contact P J Cook today to discuss options for adding a Granny Flat to your property in the Central Coast or Southern Lake Macquarie
P J Cook Building – Boutique Builders Specialising in Standard & Custom Built Granny Flats Central Coast. Our Focus is Producing Quality Built Dwellings & Providing Exceptional Service. Building Central Coast Wide.
- Avoca Beach
- Bateau Bay
- Bensville
- Berkeley Vale
- Blackwall
- Blue Bay
- Blue Haven
- Budgewoi
- Buff Point
- Calga
- Chain Valley Bay
- Charmhaven
- Chittaway Bay
- Copacabana
- Davistown
- Doyalson
- East Gosford
- Empire Bay
- Erina
- Erina Heights
- Ettalong Beach
- Forresters Beach
- Fountaindale
- Gorokan
- Gosford
- Green Point
- Gwandalan
- Halekulani
- Hamlyn Terrace
- Jilliby
- Kangy Angy
- Kanwal
- Kariong
- Killarney Vale
- Kincumber
- Kingfisher Shores
- Koolewong
- Lake Haven
- Lake Munmorah
- Lisarow
- Long Jetty
- MacMasters Beach
- Magenta
- Mangrove Mountain
- Mannering Park
- Mardi
- Matcham
- Mount Elliot
- Mount White
- Narara
- Niagara Park
- Norah Head
- Noraville
- North Avoca
- North Gosford
- Ourimbah
- Palmdale
- Pearl Beach
- Peats Ridge
- Point Clare
- Pretty Beach
- San Remo
- Saratoga
- Shelly Beach
- Somersby
- Springfield
Our focus is on building your project on time, within budget, and with no surprises once the building contracts are signed. Everything is completed to a superior P J Cook standard; our commitment to perfection ensures nothing is left to chance.
FAQ’s
Whatever the project, P J Cook Building encourages you to ask questions and expect answers.
We believe in honest, direct and open communication with our clients from the beginning and throughout the process. (And we do not believe in the shoulder shrug that some building companies will give you instead of the answers you need.)
We developed this guide to help you make an informed decision. Knowledge is power, and the more you know, the easier you will find the purchase and construction processes.
Yes, P J Cook Building offers in-house design services. Our skilled design team works closely with clients to create customized architectural plans tailored to their specific needs and preferences. By providing in-house design, we ensure a seamless process from concept to completion, maintaining high-quality standards and adherence to local regulations. Whether you’re looking for a custom home, granny flat, or duplex our in-house design services can bring your vision to life. For more information, please contact us.
Yes, P J Cook Building can build to your architectural plans. We collaborate closely with clients to ensure that their vision is realized precisely as intended. Our experienced team can work with existing architectural designs to bring your project to life, ensuring that all construction meets high-quality standards and local regulations. Whether it’s a custom home, granny flat, or duplex, we provide the expertise needed to execute your plans accurately. For more information on building to your architectural plans, please contact us.
Yes, P J Cook Building offers a variety of attached granny flat designs that integrate seamlessly with your existing home. These designs provide additional living space while maintaining the aesthetic and functional cohesion of your property. Our attached granny flats are ideal for accommodating family members, generating rental income, or creating a private guest suite. Each design is tailored to meet your specific needs and complies with all local building regulations. For more information about our attached granny flat designs, please contact us.
Yes, P J Cook Building offers a wide range of Australian granny flat designs that blend functionality and modern aesthetics. Our designs cater to various needs, including single-storey and two-storey layouts, ensuring comfortable and versatile living spaces. Each design incorporates sustainable features and meets Australian standards for quality and compliance. Whether you’re looking for a simple, cozy flat or a more expansive living area, our team can create a custom solution to suit your requirements. For more information about our Australian granny flat designs, please contact us.
Yes, P J Cook Building specializes in constructing two-storey granny flats. These designs provide additional living space and flexibility, making them ideal for accommodating extended family or generating rental income. Our team ensures that each two-storey granny flat is built to high standards, complying with all local building regulations. We work closely with clients to create custom designs that meet their specific needs and preferences. For more information about our two-storey granny flats, please contact us.
No, P J Cook Building does not build mobile or flat pack granny flats. Our focus is on constructing high-quality, custom-designed granny flats that are built on-site. This approach ensures the highest standards of durability and compliance with local building regulations. Each granny flat is tailored to meet our clients’ specific needs and preferences, providing a permanent and robust living solution. For more information about our granny flat construction services, please contact us.
Yes, P J Cook Building specializes in constructing eco-friendly granny flats. We incorporate sustainable building practices and materials to create energy-efficient and environmentally responsible living spaces. Features may include solar power systems, rainwater harvesting, high-performance insulation, and energy-efficient appliances. Our team is committed to reducing environmental impact while providing comfortable and modern living solutions. For more information about our eco-friendly granny flats and how we can customize them to your needs, please contact us.
Yes, P J Cook Building specializes in constructing self-contained granny flats. These fully functional living spaces include essential amenities such as a kitchen, bathroom, living area, and bedroom, making them ideal for extended family living, rental income, or guest accommodation. Our team ensures that each granny flat meets high-quality standards and complies with local regulations. For more information about our self-contained granny flats and how we can tailor them to your needs, please contact us.
P J Cook builds new homes, granny flats and developments in Newcastle, Central Coast, Hunter Valley, Lake Macquarie and Port Stephens regions.
The general requirements for a suitable block to build a granny flat are:
- Maximum floor area 60m2
- Blocks 450m2 or greater
- Land zoned residential
- 3m rear set back from property boundary (for blocks 900m2 & under)
Read our guides on Central Coast Granny Flats and Newcastle Granny Flats.
No! The government is encouraging the construction of granny flats in most areas via Complying Development Applications.
Under Complying Development, approvals can be obtained as quickly as ten working days (if your property meets the criteria for Complying Development).
If your property is unsuitable for Complying Development then a Development Application can be lodged with your local council.
In most cases, yes. However, purchasing an up-to-date Section 149 (versions 2 & 5) Planning Certificate from your local council is best. This will confirm whether or not there are any specific restrictions on your block that may prevent you from building a granny flat.
P J Cook Building can also happily arrange for a Section 149 (versions 2 & 5) on your behalf for a fee of only $133.
No, there are no fees for the first site inspection. Call P J Cook Building to arrange a time, and we will meet you on-site to examine your block’s suitability and complete a site measure of your chosen design, all free of charge. During the inspection, we will discuss:
- Which of our standard designs best suits your site
- Your lifestyle requirements
- Your wish list
- Budget and feasibility
- Land and slope
- Solar orientation
- Views
- Privacy
- Site restrictions
A comprehensive site inspection allows us to understand your block before providing a detailed tender. We also offer remote site assessments if necessary; however, our preference is to meet on-site in person. This ensures we fully understand your block, and you know who you are dealing with before entering into any agreements. For more information, please contact us.
No. Our design team can customise one of our standard designs to suit your own personal requirements and budget.
Alternatively, you can choose from our large range of standard, 1-bedroom, 2-bedroom designs and 3-bedroom designs. We have a large variety of designs, so you are destined to find a suitable design that works for you, your budget & your backyard. If you cant find a design let us design one for you.
All of our granny flats, new homes, duplexes, and dual occupancy projects are built on-site. We do not build kit or transportable homes. By constructing on-site, we ensure that each project meets the highest quality standards and complies with local regulations. This method allows us to deliver durable and customized solutions tailored to our clients’ needs. For more information on our building process and services, please contact us.
As a guide, once the slab is poured onsite, the construction process for a single-storey granny flat can take 15-18 weeks to complete. See our guides to building a Granny Flat on the Central Coast, Newcastle, Lake Macquarie and Hunter Region.
Yes. Providing the laneway to your property is at least 3m wide, and the dimensions of your lot (excluding the area for the laneway) are at least 12m x 12m. Please contact our team to discuss.
If your block and granny flat design meet the relevant criteria outlined in the State Environmental Planning Policy (SEPP), a private certifier can approve the plans on behalf of the Council within just 10 working days of lodgement. This streamlined process allows for faster approvals compared to traditional development applications, making it easier and quicker to start your building project. At P J Cook Building, we ensure that our designs can comply with these criteria, facilitating a smooth and efficient approval process for our clients. For more information, please contact us.
The maximum size of a granny flat is 60 square metres, excluding carports, patio, alfresco areas, etc. Check out our Granny Flat Designs for more information.
Yes. Most granny flats and homes are built on a slab on the ground. However, if your block is in a flood-affected area or your land contours are slopey, we may suggest building on piers. This decision is dependent on your site conditions.
Yes, you can select brick veneer for your granny flat. Please note that brick veneer comes with an additional cost. Additionally, choosing brick veneer will reduce the interior floor space by approximately 3-4 square meters, as the overall area is measured from the outside of the building. For more details on the implications and benefits of using brick veneer, please contact us.
No. The P J Cook Building team handle the entire process from design to handover.
No, but ideally, you could send us the following documents so that we can confidently provide you with the correct information & design ideas.
- An up-to-date Section 149 planning certificate [versions 2 & 5] or the full copy of the purchase of sale & any other relevant information.
- Contour survey to AHD level.
- Any council existing sewer diagrams or any other relevant information.
For granny flats, once preliminary contracts are signed, our experienced team can commence on-site construction within 6-8 weeks, provided complying development approvals are in place. This timeline allows for necessary preparations and ensures that all legal and regulatory requirements are met. At P J Cook Building, we prioritize efficient project management to get your granny flat construction started as soon as possible. For more detailed information and personalized timelines, please contact us.
Yes. We have a large range of external 3D facades & materials to choose from.
All appliances come with a manufacturer’s 24-month warranty. There is a 6-year structural warranty following our maintenance period, which is 13 weeks/upon practical completion. Bathroom and laundry items come with a Reece Plumbing manufacturer 12-month warranty, and the Hot Water System comes with a Reece Plumbing manufacturer 10-year warranty.
Contact Central Coast Granny Flat Builders
Honesty, integrity, reliability and customer service form the foundation of our company’s success.
Living in and being located on the Central Coast, we know our region intimately and never avoid a complex site. We have experience building in bushfire-prone areas, sloping sites and rock-based sites. Our extensive range of standard designs can be easily customised to suit all budgets and requirements.
Our vision is to ensure your desired results are achieved.
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Download our full range of granny flat designs, floorplans and inclusions
Explore various options that fit your needs. Our guide includes detailed floorplans for 1, 2, 3-bedroom and double storey granny flats, complete with dimensions and measurements for each layout. You’ll also find a comprehensive overview of design features and details, as well as a variety of facade options to personalise your project along with our Investor Inclusions guide. Whether you’re looking for a modern or classic design, this guide provides everything you need to start planning your perfect granny flat.
TESTIMONIALS
We believe word-of-mouth is the best form of advertising. We understand that when our customers’ experience exceeds expectations, we are generally awarded business from family and friends. Our customer opinions mean a lot to us. A referral is the ultimate compliment that our business can receive. This also means that we can invest less time and money in advertising and more in developing and improving the building experience for our customers.
Here are just a few reviews from clients who chose to partner with P J Cook Building:
POTENTIAL INVESTMENT RETURNS FOR GRANNY FLATS CENTRAL COAST
DID YOU KNOW GRANNY FLATS CAN RETURN 10- 20% ON INVESTMENT?
Granny flats are not just for grannies! If you rent out your high-quality P J Cook granny flat to tenants, it can provide a regular income stream.
EXAMPLE CASE STUDY OF THE FINANCIAL BENEFITS OF BUILDING A GRANNY FLAT
John lives in a four-bedroom home on a 680 square metre block in Ettalong Beach on the Central Coast. John has a large backyard with space that he does not use but has to maintain.
John adds a P J Cook 60 square metre 2-bedroom granny flat. He spends a total of $195,000.00, which includes design, approvals, and all our standard lifestyle inclusions, and is ready to move in. As this property is in Ettalong Beach, close to a lovely beach and plenty of shops, John can rent the two-bedroom Granny Flat for $500 per week.
Under this scenario, the granny flat generates an annual return of around 12-13%. John can pay off the cost of his investment in approximately 8.5 years, after which he will enjoy an income stream of almost $23,000 per annum.
Of course, this is just one example; you must consider your circumstances. For example, you might need to borrow money to fund the granny flat investment in your property. You might need to budget for landscaping, fencing, section 94 council contributions, etc. Other expenses will mean it takes longer for your investment to generate positive cash flow.
You are no doubt wondering, “Can I afford a granny flat?” you need to read our article; Financing A Granny Flat
Useful Granny Flat Articles
Custom Granny Flat Project: Green Point, Central Coast
We recently demolished a garage and built a new Garage and Granny Flat for some homeowners in Woy Woy on The Central Coast. The purpose of this build was to provide the owner with a new garage and granny flat at the rear for family, friends or Airbnb. View the project details here.
Granny Flat Project: Wadalba, Central Coast
Two-Bedroom Granny Flat Investment Project: Kuttabul Rd, Wadalba, NSW This two-bedroom granny flat, located in Wadalba on the Central Coast, was built for local investors aiming to create a dual rental income on their property, where they reside in the main house. We used our popular Woy Woy 2-bedroom floor plan, designed for both functionality and comfort. The build [...]
Granny Flat Project: Aberdare, Hunter Valley
Two-Bedroom Granny Flat Investment Project: Greta St, Aberdare, in the Hunter Valley, NSW We recently completed this 2-bedroom Granny Flat for a couple of local investors in Aberdare, located within the Cessnock Council. The goal of the project was to create a dual rental income opportunity on the property. The design was based on our Lisarow standard internal floor plan, [...]
Granny Flat Project: Tumbi Umbi, Central Coast
Two Bedroom Granny Flat Investment Project: Tumbi Umbi on the NSW Central Coast Discover the charm of our custom two-bedroom granny flat design, featuring an open-plan kitchen and living space, along with private bedrooms and bathroom areas—perfect for investors and families alike. Our latest project in Tumbi Umbi, within the Central Coast Council, showcases the flexibility of this design. The [...]
We’re thrilled to share more of our recently completed project in Erina: our stunning one-bedroom ‘Branxton’ design. As always, our team is dedicated to delivering work of the highest quality, and this build is no exception.
From start to finish, every detail was crafted with care to meet our exacting standards. It was a pleasure to hand over the keys to our wonderful client, who is excited to turn this beautiful space into their home. We can’t wait to see how they make it their own!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
We’re thrilled to share more of our recently completed project in Erina: our stunning one-bedroom ‘Branxton’ design. As always, our team is dedicated to delivering work of the highest quality, and this build is no exception.
From start to finish, every detail was crafted with care to meet our exacting standards. It was a pleasure to hand over the keys to our wonderful client, who is excited to turn this beautiful space into their home. We can’t wait to see how they make it their own!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Here’s proof that no site is too challenging when it comes to building a stunning granny flat at P J Cook. This project was particularly complex, with limited access and a steeply sloping hill, yet we still brought our clients vision to life and delivered a beautiful result. Stay tuned for an in-depth chat with our director, Peter Cook, where he’ll share insights about this build and the unique challenges we overcame.
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Here’s proof that no site is too challenging when it comes to building a stunning granny flat at P J Cook. This project was particularly complex, with limited access and a steeply sloping hill, yet we still brought our clients vision to life and delivered a beautiful result. Stay tuned for an in-depth chat with our director, Peter Cook, where he’ll share insights about this build and the unique challenges we overcame.
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our latest completed project in Erina through an immersive Matterport tour! This is our ‘Branxton’ design—a thoughtfully crafted one-bedroom, one-bathroom granny flat with slight modifications.
Experience the full virtual tour by clicking the link in our bio.
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our latest completed project in Erina through an immersive Matterport tour! This is our ‘Branxton’ design—a thoughtfully crafted one-bedroom, one-bathroom granny flat with slight modifications.
Experience the full virtual tour by clicking the link in our bio.
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our updated Investor Inclusions Guide—crafted to distinguish us with a curated selection of high-quality features from trusted suppliers.
Each item is fully detailed, enabling you to view products online with complete confidence. Achieve the ideal blend of durability, quality, and value with our expertly assembled collection.
Link in bio!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our updated Investor Inclusions Guide—crafted to distinguish us with a curated selection of high-quality features from trusted suppliers.
Each item is fully detailed, enabling you to view products online with complete confidence. Achieve the ideal blend of durability, quality, and value with our expertly assembled collection.
Link in bio!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Not sure if your block is suitable for a two-story granny flat? Reach out to P J Cook Building, and we’ll help you assess your options and explore the possibilities.
Let’s work together to find the perfect solution for your space!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Not sure if your block is suitable for a two-story granny flat? Reach out to P J Cook Building, and we’ll help you assess your options and explore the possibilities.
Let’s work together to find the perfect solution for your space!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our latest project, The ‘Woy Woy’
Take a virtual walkthrough to experience the design and layout of this beautiful two-bedroom granny flat, all from the comfort of your home. Get a true sense of space, style, and functionality.
Check it out via the link in our bio to start your tour!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
Explore our latest project, The ‘Woy Woy’
Take a virtual walkthrough to experience the design and layout of this beautiful two-bedroom granny flat, all from the comfort of your home. Get a true sense of space, style, and functionality.
Check it out via the link in our bio to start your tour!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
This 2-bedroom granny flat was built for local investors in Wadalba on the Central Coast, NSW. Using our standard Woy-Woy 2-bedroom floor plan this project went along smoothly and finishing ahead of schedule.
Key Features:
- Kitchen: Stone benchtops, dual-tone cabinets, premium appliances, and modern finishes
- Living Areas: 4.5mm vinyl plank flooring, carpeted bedrooms, and built-in wardrobes
- Climate Control: Mitsubishi split system A/C, ceiling fans, and roof ventilation
- Bathroom: Custom vanity, semi-frameless shower, and quality fixtures
- Exterior: Weathertex cladding, covered patio, and Haymes designer paint
Why Choose P J Cook Building?
With fully customizable floor plans, in-house architects, and an end-to-end project management approach, P J Cook Building ensures quality at every step. We prioritize craftsmanship over speed and cost, focusing on delivering long-lasting, meticulously built homes.
Get in touch via DM to start your journey with P J Cook Building today!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
This 2-bedroom granny flat was built for local investors in Wadalba on the Central Coast, NSW. Using our standard Woy-Woy 2-bedroom floor plan this project went along smoothly and finishing ahead of schedule.
Key Features:
- Kitchen: Stone benchtops, dual-tone cabinets, premium appliances, and modern finishes
- Living Areas: 4.5mm vinyl plank flooring, carpeted bedrooms, and built-in wardrobes
- Climate Control: Mitsubishi split system A/C, ceiling fans, and roof ventilation
- Bathroom: Custom vanity, semi-frameless shower, and quality fixtures
- Exterior: Weathertex cladding, covered patio, and Haymes designer paint
Why Choose P J Cook Building?
With fully customizable floor plans, in-house architects, and an end-to-end project management approach, P J Cook Building ensures quality at every step. We prioritize craftsmanship over speed and cost, focusing on delivering long-lasting, meticulously built homes.
Get in touch via DM to start your journey with P J Cook Building today!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
For those seeking extra space, our three-bedroom granny flats are the perfect solution. Designed with modern living in mind, they offer a seamless blend of functionality and style, ensuring you have room to live comfortably without compromising on aesthetics.
Get in touch today to find out if these designs, or any of our others, are the perfect fit for you!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
For those seeking extra space, our three-bedroom granny flats are the perfect solution. Designed with modern living in mind, they offer a seamless blend of functionality and style, ensuring you have room to live comfortably without compromising on aesthetics.
Get in touch today to find out if these designs, or any of our others, are the perfect fit for you!
#pjcookbuilding #centralcoast #buildingcentralcoast #centralcoastbusiness #grannyflat #grannyflats #grannyflatdesign #grannyflatscentralcoast #grannyflatshuntervalley #grannyflatsnewcastle #grannyflatbuilders #grannyflatbuilder
