Granny Flat Builder Blacktown

Custom Designs, Fixed Pricing & Local Expertise

Amescorp is a second-generation family building company with a showroom minutes from Blacktown. We design, approve and build custom granny flats across the Blacktown LGA — with fixed-price contracts, a 16-week build programme and a 6-year structural guarantee.

Fixed price

Once approvals are in place, we lock in your fixed price building contract

16 weeks

Standard build programme

6 years

Structural guarantee

12 min

From Blacktown to our showroom

Why Blacktown is one of Sydney's best suburbs for a granny flat

Blacktown combines generous block sizes, strong rental demand and ongoing infrastructure growth — making it one of the most practical locations in Western Sydney for a granny flat investment.

Block sizes:

Most established streets in Blacktown, Lalor Park, Seven Hills and Doonside offer lots between 500 m² and 700 m², giving you plenty of room for a well-designed granny flat with a private outdoor area.

Rental returns:

Granny flats in the Blacktown LGA typically achieve rents of $480–$600 per week, depending on size, finish and proximity to Blacktown Station.

Capital growth:

Major infrastructure including the Western Sydney Airport and Metro West line is driving long-term property value growth across Western Sydney.

Transport and amenities:

Blacktown Station, Westpoint Shopping Centre, Blacktown Hospital and the M4/M7 motorways are all within easy reach — features that matter to tenants and family members alike.

Granny Flat Designs Built for Blacktown Properties

Every Amescorp granny flat is custom-designed by our in-house architect to suit your specific block, orientation and lifestyle. We don’t use a one-size-fits-all template — we design around your land.

Our design range includes 1, 2 and 3 bedroom configurations, each available in a variety of layouts. Here’s a quick overview of what suits different situations:

1 Bedroom

2 Bedroom

3 Bedroom

Browse our complete granny flat design range to see floor plans, elevations and inclusions for every layout.

What's included in every Amescorp granny flat

Unlike many builders, Amescorp includes a full specification as standard — not a stripped-back base price with costly extras. Every granny flat we build in Blacktown comes with:

External

Concrete raft slab or Spantec steel pier subfloor (depending on site conditions)
Choice of brick veneer, Weathertex, vinyl cladding or 75 mm rendered polystyrene walls
Boral roof tiles or Colorbond metal roofing
450 mm eaves with metal fascia, guttering and 90 mm PVC downpipes
Covered and tiled front porch with LED downlight

Kitchen

Spacious polyurethane cupboards with slow-close finger-pull doors and drawers
20mm Stone Bench Top
Tiled splashback
600 mm electric glass cooktop and under-bench oven
Externally ducted rangehood

Bathroom & Laundry

Electrical & Comfort

Separate electricity meter — supply and installation included
3.5 kW Daikin reverse-cycle air conditioner
15 LED downlights throughout
Digital TV antenna with TV, Foxtel and data points to lounge and main bedroom
Hard-wired smoke detector with battery backup

See the full inclusions list and compare options at our Glendenning showroom — where two complete granny flats are on display.

Visit our showroom

Walk through two fully fitted granny flats

Unit 1, 597 Woodstock Ave, Glendenning NSW 276
- 12 minutes from Blacktown.

How granny flat approvals work in Blacktown

In NSW, granny flats are classified as secondary dwellings under the Housing SEPP 2021. There are two approval pathways, and most Blacktown properties qualify for the faster one.

The Faster Option

CDC - Complying Development Certificate

A CDC is assessed by a private certifier (not council) and is typically approved within 10–20 business days. Your property qualifies for CDC if it meets these standard criteria:

Minimum lot size of 450 m²
Minimum lot width of 12 m at the building line
Maximum internal floor area of 60 m²
Rear setback of at least 3 m
Side setback of 0.9 m (for walls under 4.5 m high)
Not heritage-listed, flood-affected or bushfire-prone

When CDC Doesn't Apply

DA - Development Application

If your property sits within a flood zone (such as parts of the South Creek corridor), has heritage restrictions, or doesn’t meet the prescriptive setback requirements, you’ll need a Development Application through Blacktown City Council. DAs typically take 45–90 days. Amescorp manages both pathways on your behalf — including architectural plans, structural engineering, BASIX reports and certifier submissions.

Not sure which pathway applies to your property? Use our free online eligibility check or call us for a site-specific assessment.

Our 5-Step Build Process

We handle every stage from concept through to handover — so you have a single point of contact for your entire project.

Step
01

Online Assessment & Review

We check your property against mapping databases, obtain sewer diagrams from Sydney Water and review any planning certificates or flood information. We’ll discuss your requirements and arrange an on-site visit.

Step 02

Site Visit & Fixed-Price Proposal

Our consultant inspects your block — checking sewer locations, land slope, demolition requirements and access. You’ll receive a detailed, fixed-price proposal covering all inclusions and site-specific costs. No surprises.

Step 03

Design Stage

You work with our in-house architect and your consultant to create a custom floor plan that fits your block, your lifestyle and your budget. We refine the design until you’re completely happy.

Step 04

Approval Stage

We prepare the full set of architectural plans, structural engineering and hydraulic reports, the BASIX certificate and the CDC or DA submission. While approvals are being processed, you visit our showroom to select materials and colours.

Step 05

Construction

Once approved, we obtain Home Warranty Insurance and assign a dedicated site manager to your project. Construction typically takes 12–16 weeks, and your site manager keeps you updated throughout.

Read more about our process including what to expect at each stage.

How much does a granny flat cost in Blacktown?

The cost of a granny flat in Blacktown depends on several factors — including the size of the build, site conditions, foundation requirements and the materials and finishes you choose.

We provide fixed-price contracts, which means the price we quote is the price you pay. There are no hidden costs or surprise variations.

Get a fixed-price quote.

Book your free site inspection and receive a detailed proposal tailored to your Blacktown property.

What Affects the Price

Size and layout

A 1-bedroom studio is more affordable than a 3-bedroom design

Foundation

Flat sites with standard soil use a concrete raft slab; sloped or reactive sites may require steel piers

Wall materials

Cladding is typically more affordable than full brick veneer

Site access

Cladding is typically more affordable than full brick veneer

Sewer and service connections

Proximity to the sewer main and whether Sydney Water’s “build over” restrictions apply

Demolition

Removing existing structures, sheds or trees

Upgrades

Stone benchtops, premium tapware, ceiling fans, additional power points

Rather than publishing a generic price range that may not reflect your situation, we recommend booking a free site inspection. Our consultant will assess your property and provide a detailed, site-specific fixed-price quote — typically within a few days.

Granny flats we've built in Blacktown

Amescorp has completed multiple granny flat projects across the Blacktown LGA — including builds in Blacktown itself, Lalor Park, Doonside, Quakers Hill, Seven Hills and Minchinbury. We know the local site conditions, the common block layouts and the council requirements inside out.

View our completed Blacktown granny flat projects to see real examples of what we’ve built in your area. You can also explore our full granny flat project gallery featuring builds from across Sydney.

Who builds a granny flat in Blacktown?

Our Blacktown clients build granny flats for a range of reasons. The most common include:

01

Rental Income

A well-designed granny flat in Blacktown can generate $480–$600 per week in rental income. With strong demand from tenants who want to live close to transport and amenities, granny flats in this area are rarely vacant for long.

02

Family Accommodation

Many families in Blacktown build a granny flat so ageing parents can live independently on the same property — close enough for daily support, but with their own private space, kitchen and bathroom.

03

Property Investment

Adding a granny flat to an existing investment property in Blacktown can shift a negatively geared property into a positively geared one. The rental income from the granny flat, combined with tax depreciation benefits, often delivers a return that outperforms many other investment strategies.

04

Home Office or Studio

With more people working from home, a separate granny flat provides a dedicated workspace away from the main house — without the distraction or noise of the household.

Why Blacktown Homeowners Choose Amescorp

Local to Blacktown

Our Glendenning showroom is just 10 minutes from Blacktown CBD. We’ve built granny flats on dozens of properties across the Blacktown LGA, so we understand the local block configurations, soil types and council expectations.

Fixed-Price Contracts

The price we quote is the price you pay. Our proposals detail every inclusion and every site-specific cost upfront — so there are no budget surprises during construction.

In-House Design Team

We have an in-house architect, engineer and interior design support — which means faster design turnarounds, better coordination and a build that’s properly engineered from day one.

16-Week Build Programme

From construction start to handover, our standard build timeframe is approximately 16 weeks. Your dedicated site manager keeps you informed at every stage.

6-Year Structural Guarantee

Every Amescorp granny flat comes with a 6-year structural guarantee, backed by Home Warranty Insurance as required under NSW legislation.

Concept-to-Completion Service

We manage the entire process — from the initial site assessment through to design, approval, construction and final handover. You can read more about our end-to-end approach on our Why Choose Us page.

Finance Options Available

We work with specialist finance brokers who understand construction lending. If you’d like to explore your borrowing options, visit our finance page for more information.

Frequently Asked Questions - Granny flats in Blacktown

Can I build a granny flat on my Blacktown property?

Most residential properties in the Blacktown LGA can accommodate a granny flat, provided the block is at least 450 m² and zoned R2 Low Density Residential (or equivalent). We offer a free eligibility check to confirm whether your property qualifies.

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

Not always. If your property meets the standard criteria under the NSW Housing SEPP 2021, you can obtain approval through a private certifier using a Complying Development Certificate (CDC) — without going through Blacktown City Council. Amescorp handles all approvals on your behalf.

What is the maximum size for a granny flat in NSW?

The maximum internal floor area for a secondary dwelling in NSW is 60 m². This applies regardless of your block size. However, within that 60 m² you can fit a spacious 3-bedroom layout with a full kitchen, bathroom, laundry and living area.

How long does it take to build a granny flat in Blacktown?

Our standard construction timeframe is approximately 16 weeks from commencement. Before that, allow 2–4 weeks for the design stage and 2–4 weeks for approvals (CDC pathway). The complete process from first consultation to move-in is typically 4–6 months.

Can I rent out my granny flat in Blacktown?

Yes. Under NSW legislation, granny flats can be rented to any tenant — they are not restricted to family members. Rental granny flats in the Blacktown LGA typically achieve $380–$500 per week depending on the number of bedrooms, finish quality and proximity to transport.

Do I need a separate driveway for a granny flat?

No. In most cases, granny flats in Blacktown do not require a dedicated car parking space or separate driveway, as confirmed under Blacktown City Council’s development controls. Your existing driveway and property access are usually sufficient.

Does a granny flat increase my property value?

Yes. Industry estimates suggest a granny flat can add between $150,000 and $250,000 to a property’s value in the Blacktown area — while also generating weekly rental income.

What happens if my property is flood-affected?

Some properties near the South Creek corridor in Blacktown may be flood-affected, which would require a Development Application (DA) rather than a CDC. Amescorp manages DA submissions and can advise on flood-related design requirements during your free site inspection.

Start Your Blacktown Granny Flat Project

Amescorp has built granny flats across the Blacktown LGA for years. We offer fixed-price contracts, a 16-week build, an in-house design team and a 6-year structural guarantee.

The first step is a free site inspection. Our consultant will visit your property, assess eligibility, discuss your design preferences and provide a detailed, no-obligation fixed-price proposal.

Visit our showroom: