Kalamunda
R-code compliant builds with BAL assessments for bush-interface lots.
PERTH HILLS · GRANNY FLATS & ANCILLARY DWELLINGS
Built for Hills Properties. Designed for Family Life.
Custom ancillary dwellings crafted for the blocks, the bush, and the lifestyle of Kalamunda, Mundaring, Lesmurdie, Roleystone and surrounds. BAL-rated builds. Fixed-price contracts. Local expertise.
WHERE WE BUILD
Serving the Perth Hills & Surrounds
We build ancillary dwellings throughout the Shire of Kalamunda, Mundaring Shire, and the City of Armadale Hills corridor. If your block is in the Hills, we know its quirks.
Mundaring
Larger rural lots, we handle septic and water board requirements.
Roleystone
Sloped sites, granite outcrops, elevated BAL zones — our specialty.
Gooseberry Hill
Middle Helena catchment constraints and wastewater planning included.
Lesmurdie
Bushfire-interface builds with compliant Colorbond and steel frame systems.
Carmel & Bickley
Rural-residential lots with a focus on privacy and natural integration.
Darlington
Heritage-sensitive areas, we design to complement existing character.
Glen Forrest
Acreage builds with relaxed R-code setbacks and larger footprints.
WHAT SETS THE HILLS APART
We Know What Hills Builds Require
Building in the Perth Hills isn't the same as building on a flat suburban block. Here's what we navigate for every project.
Bushfire Attack Level (BAL)
Most Hills properties fall within a designated bushfire-prone area. We arrange your BAL assessment early and spec your build accordingly, including ember-resistant eaves, appropriate glazing, and bushfire-rated materials.
Slope & Site Conditions
Sloped blocks in Roleystone, Lesmurdie and Kalamunda require cut-and-fill or pier foundations. We assess your site early so the slab design is costed accurately from day one.
Wastewater & Septic
Many Hills properties are not connected to scheme sewer. Our team coordinates with your local council on septic system capacity before we put pencil to paper.
Shire Planning Requirements
The Shire of Kalamunda and Mundaring each have local planning policies that sit over State R-Codes. We handle your Development Application and builder approvals as part of your project.
Access & Deliveries
Narrow driveways and steep approaches need careful planning. We stage material deliveries and crane operations to suit your site and minimise disruption to your household.
Catchment Constraints
Properties in the Middle Helena and Serpentine catchment areas have additional environmental requirements around stormwater and run-off. We factor these into your design from the outset.
OUR DESIGNS
Purpose-Built for Multi-Generational Living
Every ANWEST Lifestyle home is built using steel frame with Colorbond roofing and CFC cladding, a system that performs exceptionally in bushfire-rated environments and Hills climates.
The Retreat
- Open-plan living, kitchen & dining
- Full kitchen with island bench
- Private alfresco
- Laundry
- Approximately 16-week build
- Ideal for parents or adult children
The Abode
- Master bedroom with ensuite & WIR
- Second bedroom with built-in robes
- Full kitchen and generous living area
- Covered alfresco entertaining
- Approximately 18-week build
- Full independent living — two generations, one property
Custom Design
- Designed around your specific lot and orientation
- Hills-appropriate material selections
- BAL compliance built in from day one
- Flexible floor plan to suit your family's needs
- Full DA management included
- Talk to Mark directly about your vision
COMMON QUESTIONS
Perth Hills Granny Flat FAQs
Q: Can I build a granny flat in the Perth Hills?
A: Yes. Most Perth Hills suburbs permit ancillary dwellings under the Residential Design Codes (R-Codes). However, bushfire-prone areas require a BAL assessment, and some lots have site-specific constraints around wastewater and catchment protection. ANWEST Lifestyle manages this pre-planning process for every client as part of our service.
Q: Does a BAL rating affect the cost of my granny flat?
A: A higher BAL rating (BAL-12.5 through to BAL-FZ) requires bushfire-resistant construction features — including specific glazing, ember protection and compliant wall cladding. Our BlueScope steel frame and Colorbond system is inherently well-suited to these requirements, which often means we can meet BAL compliance more cost-effectively than traditional brick-and-tile construction.
Q: What are the rules for an ancillary dwelling in the Shire of Kalamunda?
A: The Shire of Kalamunda applies State Planning Policy 7.3 (Residential Design Codes). Key requirements include the primary dwelling being owner-occupied, the ancillary dwelling not exceeding 60sqm of habitable floor area (with limited exceptions), and Development Approval being required. Properties in areas like Gooseberry Hill also need to consider the Middle Helena Catchment wastewater constraints. We handle the DA and all pre-approval documentation on your behalf.
Q: My block is on a slope — can you still build?
A: Absolutely. Sloped sites are common across Roleystone, Lesmurdie, Kalamunda and Carmel. We assess the slope during our initial site visit, determine the most appropriate footing system (cut-and-fill, piers or a combination), and include this in your fixed-price quote. There are no hidden variations for site conditions that we've already assessed.
Q: How long does a Hills granny flat take to build?
A: A 1-bedroom ancillary dwelling is typically 12-14 weeks from slab pour to handover. A 2-bedroom build runs around 14-16 weeks. Site preparation, DA approval timing and service connections can affect this timeline, all of which we factor into your project schedule from day one.
Your Hills Block. Your Family's Future.
Talk to Mark, ANWEST Lifestyle's Director about your property, your family's needs, and what's possible on your lot.
Talk to Mark