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GRANNY FLATS
Create a flexible self-contained space for family, guests, work or future plans. Designed to maximise site orientation, privacy and efficient secondary dwelling approvals.
Build more space. Improve how you live. Create a home that feels considered from the first plan to the final detail.
St George Developments helps Sydney homeowners bring renovations, extensions, granny flats, new homes and residential alterations to life through practical planning, clear communication and coordinated construction.
Share your property suburb, project type and plans. We'll help identify the most useful next step.
St George Developments Pty Ltd helps homeowners across St George and Sydney plan and deliver renovations, extensions, granny flats, new homes, alterations and additions.
Our approach combines practical planning, clear communication and careful construction from the first conversation through to handover. Every property, household and budget is different. We begin by understanding the site, priorities and preferred outcome before discussing the right path forward.
Create a flexible self-contained space for family, guests, work or future plans. Designed to maximise site orientation, privacy and efficient secondary dwelling approvals.
Build a home shaped around your site, lifestyle, design preferences and budget. Coordinated from architectural drawings through to turn-key handover.
Create more bedrooms, living space, bathrooms or a second storey without leaving the home you value. Seamless integration between existing and new work.
Transform kitchens, bathrooms, living spaces or the entire home with a coordinated building approach.
Reconfigure existing spaces, improve natural light, open internal walls and add carefully integrated new areas.
Coordinate drawings, consultants, engineering documentation and approval requirements (CDC or DA).
A well-managed residential build depends on the clarity achieved before on-site work begins. Our principles keep you informed, your budget aligned, and your home unified.
Understand the property, constraints, access, boundaries, drainage and approvals before committing to assumptions.
A useful quote depends on a clear and coordinated scope. Drawings, engineering and specifications must align.
Know what is happening, what decisions are required and what comes next throughout each stage of construction.
New work should feel connected to the existing property — in proportion, architectural flow and construction finishes.
Final checks, trade compliance certificates, documentation and a structured walkthrough of the completed build.
A transparent, step-by-step framework that gives you control over every stage of your building project.
Tell us what you want to change, where the property is located, your likely budget and timeframe.
Assess the property, boundaries, existing structure, access constraints and available documentation.
Refine the scope and coordinate required architectural drawings, structural engineering and approval pathway (CDC or DA).
Agree documentation and contract before moving into supervised and managed residential construction.
Final defect check, trade certificates, occupation documentation and a detailed walkthrough of your finished home.
St George includes established streets, varied block sizes and homes built across many different eras — from double-brick character homes to mid-century properties and contemporary residences.
Successful renovation and extension projects need to respond to the property in front of you — not simply an inspiration image. St George Developments works across St George, Southern Sydney and selected surrounding areas with an understanding of local site logistics and Council planning controls.
Residential projects in NSW can follow different planning and certification pathways depending on the property and proposed work.
Minor building works and home improvements that do not require planning or building approval, provided they strictly meet specific development criteria.
A fast-track approval pathway issued by an accredited certifier for proposals that satisfy all development standards under NSW State Environmental Planning Policy (SEPP).
Formal approval lodged with your local Council (Georges River, Bayside, etc.) when the proposal requires variations to standards or is on land with specific planning overlays.
Confirms that construction plans and specifications comply with the Building Code of Australia (BCA) and DA conditions before building work commences.
Issued by the Principal Certifier following satisfactory completion of construction, verifying that the building is safe, compliant and ready for occupation.
Clear, practical answers regarding residential building, approvals, budgeting and project delivery.
Have a specific question regarding your site?
We build renovations, home extensions, granny flats, new homes, and residential alterations. St George Developments coordinates projects across St George and Southern Sydney from early feasibility and design coordination through to trade construction and final handover.
We service St George, Southern Sydney, and selected Greater Sydney suburbs. Key suburbs include Hurstville, Kogarah, Rockdale, Bexley, Kingsgrove, Penshurst, Mortdale, Oatley, Carlton, Beverly Hills, Ramsgate, Sans Souci, Allawah, and Bardwell Park. Service depends on current construction schedule and scope.
An accurate quote requires clear architectural plans, structural engineering, and defined finishes. Rough estimates given without investigating site access, soil conditions, or documentation frequently lead to variations. We review your existing drawings or help you define the scope before pricing.
Yes, we assist with approval coordination for our building projects. We work alongside designers, draftspeople, certifiers, and engineers to determine whether your project qualifies for a Complying Development Certificate (CDC) or requires a Development Application (DA) via Council.
Extension costs depend significantly on whether it is a ground-floor addition or second-storey build, site access, and structural engineering requirements. Ground-floor extensions involve footings, slab work, and roof integration, while first-floor additions require structural steel beams and stairs. We provide transparent, itemised costings based on actual site conditions.
Granny flat costs vary based on site slope, drainage connections, access paths, and internal finish specifications. Detached secondary dwellings up to 60m² built under NSW SEPP require site assessment to verify sewer connection locations and stormwater discharge pathways.
Duration is governed directly by the scale of structural and interior changes. A focused kitchen or bathroom reconfiguration may take several weeks, whereas a full-home renovation with structural wall removals, rewiring, and reroofing can take several months. We establish a clear construction schedule before commencement.
This depends on your property's Section 10.7 certificate and the specific dimensions of your proposal. If the design complies strictly with State Environmental Planning Policy (SEPP) criteria and has no heritage or severe environmental constraints, a CDC can be approved by a private certifier. Otherwise, a DA through local Council is required.
Living on-site depends on whether essential amenities (water, power, kitchen, bathroom) and safe physical separation can be maintained. For detached granny flat builds or isolated extensions, staying in the existing home is common. For whole-home alterations or major structural work, temporary relocation is usually recommended.
Yes. We regularly build from plans prepared by external architects and designers. We review the architectural and engineering drawings, visit the site to check buildability, and collaborate with your designer to deliver the project as specified.
Share your property, project type and ideas with St George Developments. We'll help identify the most useful next step — whether that's feasibility advice, plan review, or scheduling a site consultation.