How much does a house extension cost in Sydney?

House extension costs in Sydney vary based on size, type, and finishes. Ground-floor extensions typically cost $2,000-$3,500 per square metre, second-storey additions $3,000-$5,000 per square metre, and granny flats $120,000-$250,000. Factors affecting cost include: structural work required, site access, council requirements, and material choices. Resco Group provides detailed quotes with transparent pricing, tailored to your extension goals and budget.

What are the best granny flat builders Sydney?

The best granny flat builders Sydney combine design expertise, quality construction, and understanding of local regulations. Resco Group stands out with 20+ years of experience, expertise in granny flats and dual occupancy homes, and 5-star rated service. We design and build granny flats that comply with NSW regulations, maximize your property's potential, and provide excellent quality. Our granny flat builders deliver seamless integration with your existing home and exceptional craftsmanship.

Do I need council approval for a granny flat in Sydney?

Yes, granny flats in Sydney require council approval through a Development Application (DA) or Complying Development Certificate (CDC). Requirements include: minimum block size, setback requirements, height restrictions, and compliance with BASIX. Resco Group handles all council approvals and permits for your granny flat, ensuring compliance with NSW regulations and Sydney council requirements. We manage the entire approval process, making it stress-free for you.

How long does a house extension take in Sydney?

House extension timelines in Sydney vary by project type. Ground-floor extensions typically take 3-6 months, second-storey additions 4-8 months, and granny flats 4-6 months. The process includes: design and planning (1-2 months), council approvals (2-6 months), and construction (2-6 months). Resco Group manages every stage efficiently, coordinating trades and suppliers to minimize delays. We keep you informed throughout and work to complete your extension on schedule.

What's the difference between a granny flat and dual occupancy home?

A granny flat is a secondary dwelling on the same block as your main home, typically smaller and used for family or rental income. A dual occupancy home consists of two separate dwellings on one block, each with its own address and full independence. Granny flats are subject to size restrictions (usually max 60sqm), while dual occupancy homes can be larger. Resco Group designs and builds both, helping you choose the best option for your property and goals.

Can you build a second-storey extension on my existing home?

Yes, Resco Group specialises in second-storey extensions on existing homes in Sydney. We assess your home's structural capacity, design the extension to blend seamlessly with your existing architecture, and handle all engineering, council approvals, and construction. Our second-storey extensions add valuable space without sacrificing your backyard, creating additional bedrooms, master suites, or home offices. We ensure minimal disruption during construction and deliver exceptional results.

What makes Resco Group different from other granny flat builders Sydney?

Resco Group stands out from other granny flat builders Sydney through: 20+ years of local experience, expertise in both granny flats and dual occupancy homes, seamless integration with existing homes, premium materials and craftsmanship, transparent pricing with no hidden costs, and deep understanding of Inner West Sydney regulations. We work closely with you to design and build extensions that maximize your property's value and meet your specific needs.

Which Inner West Sydney suburbs do you do house extensions and granny flats in?

Resco Group builds house extensions and granny flats across the Inner West Council area. Our service suburbs include: Abbotsford, Annandale, Ashbury, Ashfield, Balmain, Balmain East, Birchgrove, Burwood Heights, Camperdown, Canada Bay, Chiswick, Concord, Concord West, Croydon, Croydon Park, Drummoyne, Dulwich Hill, Enfield (part), Five Dock, Forest Lodge, Haberfield, Homebush (part), Homebush West (part), Hurlstone Park, Lewisham, Lilyfield, Marrickville, Mortlake, Newtown, North Strathfield, Petersham, Rodd Point, Rozelle, Russell Lea, St Peters, Stanmore, Strathfield (part), Summer Hill, Sydenham, and Tempe. We know local character and council rules across the Inner West.

Granny Flat Builders & House Extensions

Transform Your Home
With Expert Extensions

As granny flat builders we maximise space, value & light with granny flats, granny apartment builds, rear, side‑return, or second‑storey extensions. Serving Leichhardt, Marrickville, Newtown, Balmain, Annandale, Rozelle, Glebe, Petersham, and Inner West Sydney.

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0415 346 690

Extend Your Home with Seamless, Stylish Extensions

Expert House Extensions in Inner West Sydney

Across Leichhardt, Marrickville, Newtown, Balmain, Annandale, Rozelle, Glebe, Petersham, and Inner West Sydney, we deliver expert house extensions Sydney and granny flats. As granny flat builders we design and build granny flats, dual occupancy homes, ground-floor and second-storey extensions that blend seamlessly with your existing home. We combine innovative design with superior craftsmanship to create spaces that enhance your lifestyle and add value to your property.

Create two separate dwellings on one block with dual occupancy homes. Ideal for multi-generational living or investment, each with its own address and full independence.

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Why Choose Resco Group for Extensions

Excellence in design, construction, and integration

Seamless Integration

Our extensions blend perfectly with your existing home, matching architectural style and quality

Increased Value

Well-designed extensions significantly increase your property's market value

Expert Planning

We handle all design, permits, and approvals, ensuring compliance with local regulations

Local Expertise

Deep understanding of Inner West Sydney building codes and architectural styles

Our Extension Process

A refined approach to extending your home

Design Consultation

We assess your needs and create a design that seamlessly integrates with your existing home architecture.

Planning & Approvals

Our team manages all permits, approvals, and compliance requirements with local Inner West Sydney regulations.

Construction

Expert builders execute the extension with precision, ensuring minimal disruption to your daily life.

Handover

We ensure every detail is perfect, delivering a seamless extension that feels like it was always part of your home.

Our Latest Projects

See the quality and craftsmanship we bring to every extension

75 Bayview Street

Inner West Sydney

Ground floor extension and granny flat Sydney.

326 Catherine Street

Bexley NSW 2207

Modern Family Extension

Inner West Sydney

Locations / Areas

We build and renovate across Sydney with a strong focus on our home region and extended service areas.

Primary location

Inner West

Our home base. We serve Leichhardt, Marrickville, Newtown, Balmain, Annandale, Rozelle, Glebe, Petersham, and the wider Inner West with new builds, renovations, and extensions.

Secondary locations

Extended service areas

Bayside
Georges River
North Sydney
Sutherland Shire

3 years ago

Amazing group of boys to work with, work is very professional without a steep price, highly recommended 👋

5.0

(21 reviews)

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Frequently Asked Questions About House Extensions in Sydney

Common questions about granny flats, house extensions, and dual occupancy homes in Sydney

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Extend Your Home with Seamless, Stylish Extensions

Our House Extension Services

Granny Flats & Granny Apartment

Ground Floor Extensions

Second-Storey Additions

Kitchen & Bathroom Extensions

Rear & Side Return Extensions

Dual Occupancy Homes