Use the tool below to filter granny flat designs by bedroom intent, size band, and style. Then validate your shortlist with evidence, boundaries, and risk guidance before moving to quote.
Input filters, compare photo-backed designs, then move to product detail or quote in one flow.
Bedroom intent
Style preference
Size band
Visual mode
A-8 Compact Modular Home
Exterior images
2
Interior images
4
1 Bedroom prefab granny flat with panoramic glazing — 32 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
White gable roof, dual-tone wood cladding, front verandah, and raised steel foundation — everything included.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Pitched gable roof with covered front verandah and railings — looks like a standalone cottage.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Reinforced black steel A-frame trusses, wrap-around verandah with heavy railings — modern mountain lodge.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Floor-to-ceiling glass windows on front and both expanded wings — floods the interior with natural light.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Our most popular design. A sleek white flat-roof structure accented with premium wood-grain panels. Conventional door and window layouts maximize privacy and interior wall space.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Flat roof structure with exterior cladding, doors, and windows — the proven expandable container form factor.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
White flat-roof structure with matching white frames, doors, and windows — bright, clean, and modern.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
A-10 Modular Home
Exterior images
4
Interior images
2
1 Bedroom modular granny flat with full glazing — 40 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
A-10B Loft Modular Home
Exterior images
2
Interior images
3
1 Bedroom modern granny flat with loft ceiling — 47 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
A-12B Extended Modular Home
Exterior images
3
Interior images
3
1 Bedroom prefab granny flat kit — extended 48 sqm layout
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
A-12C Modular Home
Exterior images
3
Interior images
0
1 Bedroom granny flat kit home — distinctive Variant C design, 48 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
A-12D Modular Home
Exterior images
3
Interior images
3
1 Bedroom prefab granny flat with enhanced privacy — 48 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
A-12E Pitched Roof Modular Home
Exterior images
3
Interior images
2
Prefab granny flat with herringbone pitched roof — 48 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Symmetrical pitched gable roof centred above the entry doors — the look of a standalone cottage, no verandah required.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Full-height glass front with panoramic sliding doors and side windows — modern and light-filled.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Our most popular design. A sleek white flat-roof structure accented with premium wood-grain panels. Conventional door and window layouts maximize privacy and interior wall space.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Standard casement windows with French door entry — clean, practical, and versatile with any cladding.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
P-60 Premium Modular Home
Exterior images
3
Interior images
4
Luxury 1 bedroom granny flat — premium open-plan 60 sqm kit
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
T-62 Dual-Module Home
Exterior images
4
Interior images
4
Modular granny flat with T-shaped dual-module layout — 62 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Full-height glass front with panoramic sliding doors and side windows — modern, light-filled, and spacious.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Our most popular design scaled for maximum impact. A sleek white flat-roof structure accented with premium wood-grain panels. Conventional door and window layouts maximize privacy and interior wall space.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
Premium Expandable Granny Flat
Exterior images
1
Interior images
1
Standard casement windows with French door entry — clear, practical, and versatile with any cladding for maximum wall space.
Bedroom and bathroom labels represent available floor-plan combinations for this size, not one fixed shell layout.
H-98 Multi-Module Family Home
Exterior images
1
Interior images
5
2 Bedroom prefab granny flat — spacious family home 98 sqm
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
S-140 Family Residence
Exterior images
2
Interior images
6
3 Bedroom modular granny flat / family home — 140 sqm with balconies
Bedroom and bathroom values are parsed from product room-layout strings and should be confirmed during quote review.
Core conclusions and key numbers for when you need a quick shortlist decision before deeper model-level validation.
Total design cards
25
single-index entries
Interior preview coverage
24
cards with at least one interior visual
Modular records
11
fixed model cards
Expandable shell records
14
flex-layout shell cards
NSW and Victoria both use 60 m2 triggers, but permit pathways differ. Validate jurisdiction rules first to avoid shortlisting designs you cannot lodge quickly.
Boundary: Applies to secondary-dwelling pathways; duplex/subdivision projects follow different controls.
NCC 2022 uplift means envelope and appliance assumptions now affect operability. Design comparison should include thermal and appliance trade-offs, not facade only.
Boundary: Jurisdiction adoption dates vary, so verify the applicable commencement date for your build location.
NCC Part H8 introduces step-free path and sanitary clearances, with explicit steep-site exemptions. These requirements can re-prioritize entry orientation and bathroom layout.
Boundary: Performance requirements apply to covered building classes; concession paths still need certifier confirmation.
ABS projections show strong growth in total households and lone-person households through 2046. Mixed studio/1BR/2BR filters can reduce rework when occupancy needs change.
Boundary: Projection data is national and long-range; local suburb demand still requires rental and demographic checks.
| Audience | Fit | Why | Caution |
|---|---|---|---|
| Investor comparing 1BR/2BR yield setups | Strong fit | Fast bedroom + size filtering and direct quote handoff. | Validate local rent comps and approval path separately. |
| Owner-occupier prioritizing facade style only | Conditional fit | Style tags and shell visuals are available immediately. | Interior workflow and service layout still need product-level review. |
| Council-ready documentation decisions | Not suitable alone | Page is a shortlist tool, not engineering documentation. | Move to compliance and technical quote workflow before commitment. |
Bedroom distribution
Size-band distribution
Style-tag signal counts
This is the stage1b evidence increment. Use it to test whether a shortlisted design can move through the intended pathway before you lock a quote.
| Dimension | Known fact | Applies when | Counterexample / limit | Evidence |
|---|---|---|---|---|
| NSW complying pathway | Housing SEPP Schedule 6 caps secondary dwellings at 60 m2. It also sets lot-area and combined-floor-area controls for the principal + secondary dwelling path. | Useful when user wants a fast compliant route and lot conditions are met. | A design can still fail this fast path if lot area or combined floor-area limits are exceeded. | E1 |
| Victoria small second dwelling pathway | From 14 Dec 2023, a planning permit is generally not required for a small second dwelling <= 60 m2 in most residential zones. | Works for early shortlist speed, especially for infill sites without additional overlays. | Flooding/environment/special planning controls can still trigger permit requirements; building permit remains mandatory. | E2 |
| NCC 2022 energy baseline | New homes move to 7-star thermal performance and Whole of Home limits, with DCCEEW citing average bill savings of about $183 per year. | Useful for comparing design options that differ in glazing, orientation, and appliance assumptions. | NatHERS star ratings cover thermal shell performance, not appliance efficiency by themselves. | E3, E4 |
| NCC Part H8 livable housing | Step-free path and sanitary clearances are now codified for covered classes, with commencement dates and jurisdiction variation documented by ABCB. | Critical when users need ageing-in-place or reduced mobility readiness. | Exemptions exist for steep sites and infeasible ramps; not every site can deliver the same entry layout. | E5, E7 |
These are execution-level trade-offs, not generic advice. Each row includes a common failure mode and a recovery action.
| Decision move | Upside | Failure mode | Execution fix | Evidence |
|---|---|---|---|---|
| Filter for 2BR + medium first | Faster shortlist for rental or small-family use cases. | Designs near 60 m2 can breach some fast-track pathways after porches or attached areas are counted. | Keep a fallback shortlist in compact band and confirm floor-area method before quote lock. | E1, E2 |
| Prioritize facade-led style tags | Improves alignment with streetscape and buyer preference quickly. | May hide operational cost and compliance impacts if energy/accessibility requirements are deferred. | Run an interior-focus pass immediately after style pass; include energy and accessibility checks in shortlist notes. | E3, E5 |
| Use fixed-bedroom cards only | Lower ambiguity at first pass. | Can miss flexible shell options that match changing household composition over time. | Include one mixed-range candidate and force quote-stage floor-plan confirmation. | E6 |
We do not force conclusions where open evidence is weak. These items are explicitly marked for manual confirmation.
Known: Public planning portals exist in multiple states, but a single national, like-for-like secondary-dwelling benchmark was not found.
Unknown: No reliable open national median-days dataset scoped specifically to secondary dwellings.
Impact: Timeline assumptions can drift by weeks or months if users rely on generic averages.
Validate queue and assessment pathway with the target council/certifier before deposit commitment.
Known: General construction cost indices exist, but they do not consistently isolate granny-flat style variants.
Unknown: No high-confidence public dataset was found to quantify pitched-roof vs modern-shell cost delta under comparable specs.
Impact: Users may overweight style appeal without budget realism.
Collect side-by-side quotes using the same inclusions schedule and site assumptions.
The tool uses deterministic rules over existing product datasets. It does not fabricate floor plans or architectural guarantees. Any inferred label is marked with limitations and should be verified in quote-stage technical review.
Step 1
Aggregate expandable shell and residential modular datasets into one card schema.
Step 2
Infer bedroom/style/size tags from layout strings, area values, and model descriptions.
Step 3
Display boundary warnings whenever bedroom range is mixed or inferred.
Step 4
Attach direct model and quote CTA on every result state to prevent dead-end browsing.
| Source | Type | Coverage | Date | Limitations |
|---|---|---|---|---|
| Internal product registry (`src/lib/products/alumodular.ts`) | Primary dataset | Residential model names, images, room layout, floor area | 2026-02-28 | Some room-layout values are string-parsed and need quote-stage confirmation. |
| Expandable configurator (`src/lib/configurator.ts`) | Primary dataset | Shell styles, layout options, size dimensions | 2026-02-28 | Shell visuals do not guarantee a fixed interior partition outcome. |
| Manual SERP sample (proposal research) | Context evidence | Competing gallery/floor-plan UX patterns for keyword intent | 2026-02-28 | Snapshot only; rankings and page composition may change over time. |
Comparison below reflects a manual SERP sample captured on March 1, 2026 for `granny flat designs` intent patterns.
| Dimension | This page | Sampled competitors |
|---|---|---|
| Tool-first filtering above the fold | Yes (bedroom/style/size + result feedback) | Often delayed behind long intro copy or split pages |
| Card-level decision fields | Image + floor area + bed/bath + CTA on each card | Frequently requires extra clicks into model pages |
| Boundary and risk messaging | Explicit assumptions and non-use guidance | Usually implied, not adjacent to results |
| Single-URL hybrid intent coverage | Tool + report in one canonical URL | Design gallery and advice often split into multiple routes |
| Risk | Impact | Probability | Mitigation |
|---|---|---|---|
| Choosing by facade only | High | Medium | Switch to interior-focus mode and check bedroom/bath labels before quote request. |
| Treating inferred labels as engineering truth | High | Medium | Use quote workflow to confirm exact layout package, inclusions, and compliance constraints. |
| Over-filtering to zero results | Medium | High | Use reset controls and boundary guidance; fallback to manual shortlist support CTA. |
| Ignoring state-level approval constraints | High | Medium | Review policy-research and compliance routes before final model commitment. |
Core conclusions above reference these sources. Each item includes publication timing and why it affects shortlist decisions.
Fact timing: In force current version
Defines secondary-dwelling floor-area and lot controls used for pathway pre-checks.
Open sourceFact timing: Policy change started 14 Dec 2023; current transition note references 28 Mar 2026
Explains permit pathway boundary conditions, overlay exceptions, and the 60 m2 threshold.
Open sourceFact timing: NCC 2022 implementation context, updated by DCCEEW
Documents 7-star + Whole of Home uplift and published average energy-bill impact.
Open sourceFact timing: Current guidance page (checked 2026-03-01)
Clarifies that star ratings are thermal-envelope metrics and do not include appliance performance.
Open sourceFact timing: Requirements effective 1 Oct 2023 (Tasmania 1 Oct 2024 per page note)
Provides step-free and sanitary performance requirements plus feasibility concessions.
Open sourceFact timing: Released 28 Jun 2024 (2021-2046 series)
Provides long-range household composition signals that support flexible-bedroom decision logic.
Open sourceFact timing: Current guidance page (checked 2026-03-01)
States that each state/territory determines how and when to apply livable housing requirements.
Open sourceUse these scenario templates to map your context into a concrete filter sequence and next action.
| Scenario | Assumptions | Action | Expected outcome |
|---|---|---|---|
| Rental-focused 2BR shortlist | Target tenant flexibility, medium lot | Filter `2 bedroom` + `medium` + `balanced` | Narrow to models with clearer rent-ready layouts and direct quote handoff. |
| Traditional streetscape preference | Owner wants house-like roofline | Filter `pitched roof` + `family-ready` style tags | Quickly isolate cottage/gable visuals, then verify floor-plan package. |
| Compact backyard office/studio | Low occupancy, small footprint priority | Filter `studio` + `compact` + `interior focus` | Find smallest options with interior previews before budget check. |
| High-certainty planning stage | User needs compliance-ready next step | Use page for shortlist, then jump to quote + policy research | Reduces risk of committing to visuals without approval feasibility. |
Start with bedroom intent, then size band. Add style filters only after you have a workable occupancy shortlist.
Expandable shell cards can support multiple layout packages. The card shows range-based intent, and final bedroom count is confirmed at quote stage.
Use the reset action in the tool, switch to Balanced mode, or request a manual shortlist through the fallback quote CTA.
Treat the counts as coverage indicators, not quality scores. Higher interior count simply means more room-focused visuals are available.
No. This route is for shortlist and early comparison. Final commitments require quote review, inclusions check, and compliance pathway confirmation.
Not always. Some values are package-dependent or rounded from model-level metadata. Use product and quote pages for final specification sign-off.
Only at a directional level. For regulatory decisions, use the policy research and compliance pages, then confirm with project-specific documentation.
Prioritize function first (bedroom and area), then use style tags to refine. If conflict remains, compare top two options in quote consultation.
Use model detail for visual/spec deepening. Use quote when you have 1-3 candidate designs and need pricing, delivery, and site-fit confirmation.
Yes. Keep the same URL and communicate your selected filters; then attach shortlisted model links in your planning thread.
Prepare postcode, intended use (rental/family/workspace), timeline, and your preferred bedroom and style shortlist from this page.
Submit a shortlist quote request with your top uncertainty noted. The team can provide a constrained recommendation path instead of full custom scoping.
Keep momentum after design shortlisting by validating policy, budget, and return assumptions.
Share your postcode, preferred bedroom range, and style direction. We will return a shortlist with practical next-step recommendations.