Duplex Builder in Sydney, Central Coast, Newcastle & Hunter Valley
Are you Building a Duplex in NSW?
This is a smart way to create flexible living arrangements and maximise land value.
You can rely on Amescorp custom duplex builders in Sydney, Newcastle, the Central Coast and Hunter Valley.
Our team creates bespoke duplexes that are beautiful to live in. We handle everything from council approval and design to construction and handover.
Amescorp’s licensed tradespeople, architects and designers bring your vision to life. We ensure superior design, quality work, competitive pricing and open communication for a stress-free journey.
Our Custom Design & Build Process
Site assessment
Custom design
Council approvals and documentation
Construction
Handover and support
Custom design
Construction
We take the Stress out of your Building Journey
Inclusions
- ARCHITECTURAL DESIGN & STREET APPEAL
- STRUCTURE & BUILD QUALITY
- GARAGE & DRIVEWAY
- WINDOWS, DOORS & LIGHTING
- KITCHEN - FUNCTION & STYLE
- BATHROOMS & ENSUITES
- BEDROOMS & STORAGE
- FLOORING
- COMFORT & ENERGY EFFICIENCY
- LAUNDRY
- EXTERNAL & LANDSCAPING
- SITE WORKS
- SAFETY & TECHNOLOGY
- LIFESTYLE & DESIGN TRENDS FOR 2026
- OPTIONAL UPGRADES
- COMPLIANCE & DOCUMENTATION
- Contemporary facades with coordinated material and colour palette
- Render, feature brickwork, or vertical cladding accents
- Recessed balconies / screens for privacy and depth
- Compliance with NSW Housing Diversity Code (attached dual occupancy standards)
- Passive solar and climate-aware design (east-west orientation where possible)
- Letterbox numbers integrated into frontage
- Engineer-designed concrete slab on ground
- Brick veneer or full masonry construction (par BASIX & engineer requirements)
- Structural steel baams as required
- 2.7m ground floor ceilings, 2.4-2.6m first floor ceilings (subject to design)
- Souncl—rated party wall and thermal insulation
- Termite protection system
- Sarking to roof
- Colorbond or concrete roof tiles
- 90mm wall frames
- Fire-rated and acoustic party wall system compliant with NCC
- Choice of Single or Double Lock- Up Garage
- Sectional Colorbond garage door with remote control
- Internal access door (where design permits)
- Concrete driveway (plain or exposed aggregate optional upgrade)
- Provision for EV charging point rough-in
- Provision for garage storage shelving
- Aluminium framed windows and sliding doors
- Flyscreens to all operable windows
- Sliding stacker doors to alfresco where applicable
- Solid core internal doors
- Feature entry door with digital smart lock
- Dimmable LED downlights throughout
- Natural light—maximising layouts, north—facing windows where possible
- Designer layout (island bench where space permits)
- 40mm stone benchtops
- Waterfall edge to island (design dependent)
- Full-height splashback tiles
- Soft—close cabinetry A drawers (polyurethane or laminate)
- Feature overhead cupboards
- Stainless steel undermount sink with pull—out mixer top
- Stainless steel appliances: 900mm cooktop, 600mm built-in oven, 600mm rangehood ducted externally, dishwasher
- Walk-in pantry or large built-in pantry
- Floor-to-ceiling tiling in wet areas
- Semi—frameless shower screens
- Freestanding bathtub (main bathroom)
- Wall—hung or semi—recessed vanities with stone tops
- Back-to-wall toilet suites
- LED mirrors (design dependent)
- Quality chrome or matte block topware
- Ensuite to master bedroom
- Master suite with walk-in robe
- Built—in wardrobes in bedrooms 2 & 3
- Premium carpet with underlay in bedrooms
- Linen cupboard storage
- Extra TV and data points in master bedroom
- 600×600 porcelain tiles to ground floor living areas
- Timber-look hybrid flooring to ground floor living zones (optional upgrade)
- Carpet upstairs (bedrooms and hallways)
- Tiled alfresco (where applicable)
- Ducted raverse-cycle air conditioning
- LED lighting throughout
- Instantaneous gas hot water system
- Roof insulation and energy-efficient glazing
- Minimum 6.6kW solar PV system
- BASIX compliance
- Smoke alarms (hard—wired with battery backup)
- Custom cabinetry with stone benchtop
- Stainless steel laundry tub
- Tiled floor and splashback
- External access (design dependent)
- Turf to front and rear yards
- Concrete paths & alfresco tiled area
- External lighting
- Clothesline & garden tap
- Standard boundary fencing to side and rear
- Bulk excavation and site levelling
- Soil compaction and preparation for slob
- Footings and drainage trenches
- Stormwater connection to Council requirements
- Temporary sediment control during construction
- Grading for site drainage
- Provision for driveways, paths, and alfresco slob
- Connection to water, sewer, and electricity services (where applicable)
- Letterbox numbers installed and aligned with Council addressing
- Hard-wired smoke alarms with battery backup
- Security system cabling & power points
- Smart thermostat and data points in key living areas
- NBN/FTTP compliant cabling
- Ample natural light, natural materials (timber tones, stone), and connection to outdoor spaces
- Space for flexible work—from—home or study niches
- Biophilic touches (optional): skylights, glazed panels, planters
- Skylights
- Feature staircase wlth glass balustrade
- Outdoor kitchen or BBQ alfresco setup
- Rainwater harvesting syetem
- Heated towel rails
- Pendant lighting packages
- CCTV & alarm system
- Smart home package
- Exposed aggregate driveway
- Higher performance windows / privacy glozlng
- Upgrade facade packages
- Registered Architect-design
- Architects & engineers documentation
- CDC or DA approval support
- Stormwater design
- BASIX certificate
- Long Service Levy
- Home Building Compensation Fund (HBCF)
- Standard construction insurance
- Contemporary facades with coordinated material and colour palette
- Render, feature brickwork, or vertical cladding accents
- Recessed balconies / screens for privacy and depth
- Compliance with NSW Housing Diversity Code (attached dual occupancy standards)
- Passive solar and climate-aware design (east-west orientation where possible)
- Letterbox numbers integrated into frontage
- Engineer-designed concrete slab on ground
- Brick veneer or full masonry construction (par BASIX & engineer requirements)
- Structural steel baams as required
- 2.7m ground floor ceilings, 2.4-2.6m first floor ceilings (subject to design)
- Souncl—rated party wall and thermal insulation
- Termite protection system
- Sarking to roof
- Colorbond or concrete roof tiles
- 90mm wall frames
- Fire-rated and acoustic party wall system compliant with NCC
- Choice of Single or Double Lock- Up Garage
- Sectional Colorbond garage door with remote control
- Internal access door (where design permits)
- Concrete driveway (plain or exposed aggregate optional upgrade)
- Provision for EV charging point rough-in
- Provision for garage storage shelving
- Aluminium framed windows and sliding doors
- Flyscreens to all operable windows
- Sliding stacker doors to alfresco where applicable
- Solid core internal doors
- Feature entry door with digital smart lock
- Dimmable LED downlights throughout
- Natural light—maximising layouts, north—facing windows where possible
- Designer layout (island bench where space permits)
- 40mm stone benchtops
- Waterfall edge to island (design dependent)
- Full-height splashback tiles
- Soft—close cabinetry A drawers (polyurethane or laminate)
- Feature overhead cupboards
- Stainless steel undermount sink with pull—out mixer top
- Stainless steel appliances: 900mm cooktop, 600mm built-in oven, 600mm rangehood ducted externally, dishwasher
- Walk-in pantry or large built-in pantry
- Floor-to-ceiling tiling in wet areas
- Semi—frameless shower screens
- Freestanding bathtub (main bathroom)
- Wall—hung or semi—recessed vanities with stone tops
- Back-to-wall toilet suites
- LED mirrors (design dependent)
- Quality chrome or matte block topware
- Ensuite to master bedroom
- Master suite with walk-in robe
- Built—in wardrobes in bedrooms 2 & 3
- Premium carpet with underlay in bedrooms
- Linen cupboard storage
- Extra TV and data points in master bedroom
- 600×600 porcelain tiles to ground floor living areas
- Timber-look hybrid flooring to ground floor living zones (optional upgrade)
- Carpet upstairs (bedrooms and hallways)
- Tiled alfresco (where applicable)
- Ducted raverse-cycle air conditioning
- LED lighting throughout
- Instantaneous gas hot water system
- Roof insulation and energy-efficient glazing
- Minimum 6.6kW solar PV system
- BASIX compliance
- Smoke alarms (hard—wired with battery backup)
- Custom cabinetry with stone benchtop
- Stainless steel laundry tub
- Tiled floor and splashback
- External access (design dependent)
- Turf to front and rear yards
- Concrete paths & alfresco tiled area
- External lighting
- Clothesline & garden tap
- Standard boundary fencing to side and rear
- Bulk excavation and site levelling
- Soil compaction and preparation for slob
- Footings and drainage trenches
- Stormwater connection to Council requirements
- Temporary sediment control during construction
- Grading for site drainage
- Provision for driveways, paths, and alfresco slob
- Connection to water, sewer, and electricity services (where applicable)
- Letterbox numbers installed and aligned with Council addressing
- Hard-wired smoke alarms with battery backup
- Security system cabling & power points
- Smart thermostat and data points in key living areas
- NBN/FTTP compliant cabling
- Ample natural light, natural materials (timber tones, stone), and connection to outdoor spaces
- Space for flexible work—from—home or study niches
- Biophilic touches (optional): skylights, glazed panels, planters
- Skylights
- Feature staircase wlth glass balustrade
- Outdoor kitchen or BBQ alfresco setup
- Rainwater harvesting syetem
- Heated towel rails
- Pendant lighting packages
- CCTV & alarm system
- Smart home package
- Exposed aggregate driveway
- Higher performance windows / privacy glozlng
- Upgrade facade packages
- Registered Architect-design
- Architects & engineers documentation
- CDC or DA approval support
- Stormwater design
- BASIX certificate
- Long Service Levy
- Home Building Compensation Fund (HBCF)
- Standard construction insurance
Our Process
What’s the cost of building a duplex in Sydney, Newcastle, the Central Coast and Hunter Valley?
GET A FREE SITE INSPECTION AND FIXED-PRICE DUPLEX QUOTE NOW
Take advantage of this no-obligation offer and move forward on your duplex project today!
No hidden costs. Free site inspection.
5 Benefits of Building a Duplex in NSW

Boost land value
Develop two dwellings on one land.

Generate rental income
Live in one house and rent the other side to offset your mortgage.

Multigenerational living
Keep family close while maintaining privacy.

Strong investment returns
Duplexes deliver strong capital growth & rental yields.

Potential to subdivide
Depending on council requirements, you may be able to strata-title each dwelling for independent sale.
No need to wait days, fill out the form below and submit and we will come back to you with a quote.
Our Testimonials
Trustindex verifies that the original source of the review is Google.
From the very beginning when we were looking at people to build with, to lock up. The service was exceptional. The quality is great. The people were lovely. And most of all the price was The best Of all the quotes we received. You won’t regret building your granny flat with Amescorp+7Trustindex verifies that the original source of the review is Google.
We recently completed a granny flat project with Amescorp and are very happy with the final outcome. From the beginning, Ramon Dunlany was professional, knowledgeable, and helpful in guiding us through the planning and sales process. Throughout construction, Danny Lazar did an excellent job as project coordinator, always being approachable, responsive, and willing to assist whenever questions arose. As with many construction projects, there were some delays along the way, which at times was frustrating. However, the team remained professional, kept us informed, and stayed focused on delivering a quality result. The finished granny flat has been completed to a high standard, and we are very pleased with the workmanship, presentation, and overall quality of the build. The end result was worth the wait, and we appreciate the efforts of everyone involved. We would happily recommend Amescorp to anyone considering a granny flat project.+0Trustindex verifies that the original source of the review is Google.
Construction started in October and still not turned over (over 7 months now!). The team at Amescorp are good people to work with. Unfortunately, they had issues with their sub-contractors which significantly delayed our project. Just some pointers: (1)Double check the kitchen design. As my photo shows, there is a window right where the sink is. The silicone in mine would likely mould in due time as water would splatter over the window from the kitchen sink when cleaning dishes. (The foreman says it's ok though.) (2) Be careful also about the council fees. They advised it would just be around 5-6k but my bill came to 21k. (3) Make sure also you don't let their tradies use your water hoses or any of your facilities for that matter. Their workers broke my retractable water hose.+2Trustindex verifies that the original source of the review is Google.
Big thanks to the Amescorp team for completing our granny flat - really happy with how it turned out. They delivered more than what was promised and the quality shows. Danny, the construction manager, was excellent throughout. He’s professional, friendly, and clearly knows his work and his team well, which made the whole process a lot smoother for us. He made sure everything from structure, brick work and gyprock to painting and tiling was done properly. He was easy to deal with, gave helpful suggestions, and regularly checked in to make sure things were on track. Danny also handled unexpected issues smoothly, providing practical solutions without driving up the cost. Being completely honest, I do want to add a small word of caution regarding the plumbing work. While the overall service was good, the plumbing side of things didn’t quite meet the same standard and could definitely be improved. Apart from that, we really appreciated how well they kept things organised throughout the build. Everyone who’s seen the granny flat has had great things to say, and even a few neighbours have asked about Amescorp for their own projects. Building is about turning your dream into reality, and having a team you can trust makes it all a pleasant journey.+4Trustindex verifies that the original source of the review is Google.
We recently completed a 60sqm granny flat build with Amescorp and had a fantastic experience from start to finish. The whole process was smooth, well organised, and delivered on time with no major issues. A special thank you to our site foreman, Steve, who was outstanding throughout the entire build. He kept everything running smoothly, communicated clearly, and was always approachable whenever we had questions. It was obvious he genuinely cared about the quality of the build and making sure everything was done properly. Building can often be a stressful process, but Steve made it easy and straightforward for us. We really appreciated his professionalism and attention to detail. Very happy with the final result and would happily recommend Amescorp to anyone considering building a granny flat.+3Trustindex verifies that the original source of the review is Google.
Great outcome. project manager danny was so accommodating to all the changes we did along the way, nothing was too hard. The pictures don’t do it justice. The quality of the construction is to a high standard. Any imperfections were spotted by danny and rectified immediately. Great honest company. Can’t wait for the next project. Definitely coming back. They make the whole process seamless.+6Trustindex verifies that the original source of the review is Google.
I build my first granny house with Amescorp and met my expectations with the quality of the build , material used and the staff and contractors all have been excellent. This was all due to having a great project manager that Amescorp gave me as Danny . I was that happy that I am now looking at building my second granny flat as an investment property to increase my returns as a self funded retiree . I built my second granny flat and had it competed in September 2025. Again very happy with the quality of the build and the professional way the Project Manager Danny managed this project . Highly recommended company+6Trustindex verifies that the original source of the review is Google.
Thank you team for being so sufficient and supporting during my building process of my granny flat in Central Coast. You all have been very communicative and awesome to deal with. I built my flat with a building process that normally takes 6 months that only took 4 months approximately! Thank you Ali and the team for helping me through a meant to be stressful journey that has been nothing but stress FREE. Contact the Amescorp team to experience the stress free building process. Highly recommend! Thanks again team :)+5Trustindex verifies that the original source of the review is Google.
Very Professional, Best Material and Worksmaship, Great Value. Amescorp uses the best grade material and built a 5 star granny flat. They provide 10 lineal meter PU kitchen cabinets, floor to ceiling tiled bathroom and great flooring tiles with best selection, stone benchtop and many other premium features. Their structural , foundation, frames and roofs are all superb quality and engineering. The Team both office ( Carl, Alisha, Jess , James ) are very professional and helpful and the site team led by Steve the supervisor is friendly and easy to work with. They are not trying to upsell anything nor chasing variations. They deliver all works within the agreed contract. They engage the best tradies and Subcontractors who are a very friendly, professional and did a great job. Amescorp is a 5 star builder that goes above and beyond and spares no cost or resource to provide an exceptional build. The only criticism or area of improvement, if i have to add a negative, is at handover they were bit slow to finish all works and handed over the site with some minor finishing works and touch up outstanding, which i am still chasing to close . But that is common in all building works. But Overall I was very happy with Amescorp’s work and quality.+4Trustindex verifies that the original source of the review is Google.
amescorp are the best in the business when it comes to granny flats, fast turn around competitive pricing, and always attentive to my needs a special thanks to danny who fulfilled all my requests.+0Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
Your home should be a true representation of your personality and lifestyle — and at Amescorp, we’re here to bring that vision to life. As experienced specialists in custom home building, we work closely with you to design and construct a home tailored to your unique needs. Our skilled and passionate team is committed to transforming your ideas into a beautiful, functional space you’ll be proud to call your own.