Building Design for
Home Extensions & Additions, Greater Sydney, NSW
Building design and architectural drafting for home extensions, first-floor additions and major renovations in The Hills District and right across Sydney.
Home Extension Design & Council Approvals Across Greater Sydney
Planning a home extension or first-floor addition and unsure what your local council will allow?
Based in Castle Hill, Distinct Innovations provides home extension design, architectural drafting and approval services across Greater Sydney. We consider how the proposed work connects with your existing home, site constraints and relevant council planning controls.
We assess whether your proposed extension may qualify for a Complying Development Certificate (CDC) or require a Development Application (DA). Our services include architectural plans, consultant coordination, approval documentation and managing NSW Planning Portal lodgement and council correspondence where applicable.
With over 30 years of residential design experience, we have worked on home extensions and renovations across Greater Sydney, navigating the planning and approval requirements of numerous local councils. Our featured projects demonstrate this experience across The Hills Shire, Parramatta, Canada Bay, Penrith, Northern Beaches and other Sydney council areas.
We provide independent building design, plans and approvals, not construction.
Why Choose Us for Your Home Extension or Renovation
30+ Years' Experience
Extensive experience in home extensions, first-floor additions and major renovations.
Existing Home Reviewed
Structure, roof form, levels, access and site constraints considered early.
Integrated Design
New spaces work naturally with the existing home, improving flow and function.
Personally Led
Deal directly with Luke from initial design to architectural drafting and approvals.
Clear Fee Proposals
Fees based on scope, with inclusion and exclusions clearly outlined
Design Experience With Existing Homes
Designing an extension or renovation requires a thorough understanding of the existing home. Structural walls, roof connections, floor levels and stair locations can all influence how new spaces integrate with the original building.
We consider these conditions early, alongside site access and planning requirements, to develop practical solutions for ground-floor extensions, first-floor additions and major renovations. Our approach balances design, functionality and buildability, helping new and existing spaces work together as a cohesive home.
Ground-Floor Extensions
Additional living, kitchen, family and bedroom spaces designed around the existing home.
Following an extensive approval process with Canada Bay Council, Salt Street House was successfully completed and later recognised for excellence in heritage building design, construction quality and residential renovation. The project delivered improved family living, enhanced functionality and a substantial increase in property value while carefully preserving the home's original character. The completed renovation ultimately achieved a record-setting sale, demonstrating the long-term value of high-quality heritage renovation and extension design.
DA Approved - City of Canada Bay Council
First-Floor Additions
Upper-level additions developed around structure, stairs, roof form, privacy and planning controls.
Castle Hill House | Castle Hill
Castle Hill House demonstrates how a residential extension and upper-storey addition can substantially increase living space while retaining the established street presentation of the original home. The completed project delivers improved family functionality, contemporary outdoor living and a cohesive architectural relationship between the existing residence and new work.
Complying Development Certificate (CDC) - The Hills Shire Council
Major Home Renovations
Reworking existing layouts to improve space, circulation, natural light and functionality.
Idaline House | Collaroy Plateau
The completed home is almost unrecognisable from the original modest brick residence. The project demonstrates how a substantial extension can completely change the functionality and appearance of an existing home without resorting to a knockdown rebuild. The finished design provides the additional accommodation and garaging the owners needed while establishing a much stronger contemporary presence within the Collaroy Plateau streetscape.
DA & CC Approval - Northern Beaches Council
Indoor-Outdoor Resort-Style Living
Design improving connections between internal living areas, gardens, decks and outdoor spaces.
Mt Vernon House demonstrates how a large-scale home extension can successfully combine architecture, outdoor living and lifestyle-focused design. The completed project delivers expansive entertaining spaces, premium recreational facilities and a strong connection between indoor and outdoor living areas while preserving the appeal of the original residence.
DA & CC Approval - Penrith City Council
Existing Home & Site Review
Consideration of structure, levels, access, setbacks and other site constraints before design progresses.
River Road Villa House demonstrates how an existing home can be substantially expanded despite significant flood planning constraints. By concentrating most of the additional accommodation upstairs, the design delivered considerably more family living space while working within restrictions on ground-floor development. The completed home combines improved internal planning, outdoor entertaining, passive solar design and river views while retaining and adapting the original residence rather than replacing it.
DA & CC Approval - Penrith City Council
Architectural Drafting & Council or CDC Approvals
Concept design, architectural drafting and documentation for DA, CDC and Construction Certificate approvals, with consultant coordination where required.
After more than two years of design development, collaboration and council liaison, Heritage Renovation DA approval was achieved within six months of lodgement, followed by Construction Certificate approval. The completed 400m² extension blends naturally with the original residence, delivering a sympathetic heritage renovation that preserves the home's character while supporting modern family living.
DA & CC Approval - City of Parramatta Council
"Loved our experience with Luke & Distinct Innovations! We're delighted not only with the design but also Luke's ability to make his vision come to light. We've got a bespoke, luxury home now, which sets it apart. Thank you!"
Our Extension & Renovation Design Portfolio
Examples of our home extension, renovation, and first floor addition design work are shown below. These projects show how older homes and heritage homes can be reworked to improve space, natural light, flow, street presentation, outdoor living and everyday liveability.
Home Extensions & Renovations FAQs
What does a home extension designer do?
A home extension designer assesses the existing house, site conditions and planning requirements before developing an addition that works with the original home. This can include rear extensions, first-floor additions, internal reconfiguration, architectural drafting, DA or CDC plans and coordination with consultants required for approval.
Do I need a DA or CDC for a home extension in Sydney?
The approval pathway depends on the property, zoning, planning controls and proposed work. Some home extensions and first-floor additions may qualify for a Complying Development Certificate, while others require a Development Application through the local council. We review the site, setbacks, building height, floor space ratio, heritage status, bushfire risk and other relevant controls early to identify the likely approval pathway.
What should be assessed before designing a first-floor addition or major renovation?
The existing structure, roof form, floor levels, site access, privacy, overshadowing, drainage, streetscape and planning requirements should be reviewed before the design is developed. A surveyor, structural engineer, BASIX assessor or other consultant may also be required. Early investigation helps establish what can reasonably be designed, approved and built.
Can you design my home extension and manage approval through my local council?
Yes. Distinct Innovations provides home extension design, architectural drafting and approval documentation across Greater Sydney. We review your property's planning requirements, develop the proposed design and prepare the relevant DA or CDC documentation. Depending on the agreed scope, we can also coordinate consultants, manage NSW Planning Portal lodgement and liaise with the local council or appointed certifier throughout the approval process. Our experience covers numerous Sydney council areas, including The Hills Shire, Parramatta, Canada Bay, Penrith and Northern Beaches.
Not sure whether to renovate, extend or rebuild? Read our homeowner guide →