A secondary dwelling—commonly called a granny flat—is a self-contained dwelling established in conjunction with a principal dwelling on the same lot. It may be within, attached to or separate from the principal dwelling. Its legal classification depends on the approved use and documents, not its marketing name or construction method. The NSW secondary-dwelling guidance explains this statewide framework.
This guide combines verified statistical information about Craigie (NSW) with statewide planning and consumer-protection guidance. The available locality evidence is limited, so it does not support claims about local lifestyle, services, hazards, zoning, lot characteristics or market performance. Those matters must be established for the legal parcel through current official records.
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Local granny-flat overview
Craigie (NSW) is identified by the Australian Bureau of Statistics as Suburbs and Localities code SAL11104. SAL means the ABS Suburbs and Localities geography. SAL boundaries are statistical approximations and are not cadastral, title, zoning or council boundaries. They must not be confused with Statistical Area Level 1 or SA1 geography.
The canonical locality record gives the Craigie SAL an area of 97.9635 square kilometres and four mesh blocks. It records the whole statistical area as overlapping the ABS local government area named Snowy Monaro. That is the ABS statistical LGA name, not the formal name of a council organisation. The corresponding organisation in the supplied official source pack is Snowy Monaro Regional Council, but the overlap alone does not prove that it is the responsible consent authority for a particular parcel.
The 2021 Census All persons QuickStats for Craigie reported 29 people, 11 private dwellings and a median age of 42. These are historical results from the 2021 Census edition, not current population or property-market measures. Because the recorded population and dwelling counts are very small, percentages and medians can be unstable or disclose little about current demand. Generic demographic, rental or investment conclusions would therefore be unsafe.
Under the statewide framework, a secondary dwelling is associated with a principal dwelling and remains on the same lot. The secondary-dwelling pathway does not create a separately subdividable, separately titled or independently saleable residence. A freestanding building is not automatically a secondary dwelling, and an existing shed, garage or studio cannot be treated as approved accommodation without checking its approval history and lawful use.
NSW guidance says secondary dwellings are permitted in residential zones R1, R2, R3, R4 and R5. They may also be permitted in other zones where the applicable local environmental plan provides for them. This is a statewide statement about potential permissibility, not evidence that land in Craigie has one of those zones or that a proposal is approvable. Rural and other non-residential land may be subject to different local environmental plan provisions.
For locality-level research, use the NSW Planning Portal Spatial Viewer as a starting point. For an actual project, match the street address to its lot and deposited plan, title and current planning maps. This parcel-level step is necessary because statistical overlap cannot establish zoning, legal access, private restrictions, servicing or mapped constraints.
Council rules and approval pathway
NSW provides two potential approval pathways for a secondary dwelling. A development application is assessed by the responsible council. Alternatively, a complying development certificate may be issued by the council or an appropriately registered certifier if every applicable statutory requirement is satisfied. NSW complying-development guidance describes complying development as a standards-based pathway; a certifier cannot waive a standard, prerequisite or mapped exclusion.
For the complying-development pathway under the Housing SEPP, NSW planning guidance identifies a minimum lot area of 450 square metres, except where the secondary dwelling is located entirely within an existing dwelling house. This is only one eligibility test. It is not a universal minimum for a council-assessed development application, and satisfying it does not establish CDC eligibility.
The proposal must be checked against the current State Environmental Planning Policy (Housing) 2021, including its relevant schedule, and the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008. The assessment must also address the property’s zone, mapped exclusions, applicable local environmental plan and development control plan, existing approvals and the proposal’s site and design standards. Superseded Affordable Rental Housing SEPP material should not be used as current law.
The supplied geographic evidence points to Snowy Monaro Regional Council material as a logical research source, subject to confirming the legal parcel and responsible authority. If that authority is confirmed, consult the council’s current development-application guidance and its instructions for using the NSW Planning Portal. No particular local planning instrument is named here because the evidence does not establish which instrument applies to an individual property.
Before choosing a pathway, obtain or check:
- the title, deposited plan, survey and approval history of existing buildings;
- easements, covenants, restrictions, legal access and utility locations;
- zoning and current local and state planning instruments;
- sewer or wastewater arrangements, stormwater requirements and drainage assets;
- property-specific mapped controls or constraints shown by official sources;
- council application requirements, contribution plans, fees, waste controls and vehicle-crossing processes; and
- whether the proposal is internal, attached, detached or a conversion of existing work.
Planning approval may not override private title restrictions. Similarly, a map can identify an issue for investigation but does not replace the relevant legal instrument, survey, specialist report or authority advice. Constraints such as bushfire, flooding, heritage, biodiversity or contamination should be raised only where official address-level evidence shows they are relevant.
The Housing SEPP does not itself require additional parking for a secondary dwelling. Existing consent conditions, loss of existing parking, access safety, driveway design and other applicable requirements may still need assessment.
Following approval, the project may require construction certification, appointment of a principal certifier, inspections and compliance certificates. Service NSW explains that an occupation certificate is required before a new building is occupied or used, or before an existing building is used following an approved change of use. A quote, concept plan, BASIX certificate or builder statement is not an approval.
Costs and budgeting
There is no verified Craigie-wide construction price in the supplied evidence. A useful budget must instead reflect the investigated parcel, approved design, procurement method and documented scope. Access, slope, ground conditions, service distances, wastewater arrangements, conversion work, external works and specification choices can materially alter the result.
Build the budget under separate headings:
- title, survey, planning and service investigations;
- design, engineering and specialist reports;
- application, Planning Portal and certifier charges;
- council contributions and authority charges where applicable;
- demolition, excavation, retaining and site preparation;
- building work, fixtures, finishes and BASIX commitments;
- stormwater, sewer or wastewater, water, electricity and communications;
- driveways, paths, fencing, landscaping and waste removal;
- inspections, certificates, insurance and finance expenses; and
- allowances for identified but unresolved site risks.
Obtain itemised, like-for-like quotations based on the same drawings, specification and site information. Require each quotation to distinguish fixed inclusions from exclusions, provisional sums and assumptions. In particular, clarify responsibility for approvals, engineering, rock excavation, unsuitable soil, utility upgrades, service connections, external works and handover documents. An advertised package price is not a completed-project cost unless its scope and site assumptions support that description.
The current Building Commission NSW contract guidance says residential building work costing more than $5,000 requires a written contract, while more extensive large-job contract requirements apply above $20,000. The maximum deposit is 10%. Read the Consumer Building Guide, ensure progress payments correspond to completed work and obtain advice on unclear terms before signing.
Home building compensation cover applies where required by the statutory value and work criteria. The supplied official guidance identifies work valued at $20,000 or more including GST as the relevant threshold. Before paying money or allowing work to begin, use the official HBC Check to verify the certificate and confirm that the builder entity, site and work correspond with the contract.
Check current council, authority, contract and insurance information when quotations are finalised. Record confirmed amounts separately from allowances so unresolved scope is visible during comparison.
Design and site considerations
Start with an accurate survey and a defined proposal. Record boundaries, levels, existing buildings, access, easements, significant trees and available service information. Confirm whether the secondary dwelling will be within, attached to or separate from the principal dwelling, or whether an existing structure is proposed for conversion. That choice affects planning classification, construction interfaces, documentation and servicing.
Test the design against the way both dwellings will function on one lot. Relevant matters include:
- safe and legible pedestrian access;
- visual and acoustic privacy between entrances, windows and outdoor areas;
- daylight, ventilation and practical room layouts;
- usable private open space, clothes drying and waste storage;
- maintenance access to buildings and shared infrastructure;
- parking and vehicle manoeuvring impacts; and
- practical routes for stormwater, wastewater and other utilities.
Floor area, setbacks, height, landscaped area, site coverage and earthworks must be checked under the exact approval pathway and current instruments. Do not apply figures taken from another council, another development type or an older version of a planning instrument. For rural or non-residential land, verify the applicable local environmental plan rather than importing residential-zone assumptions.
Resolve drainage, sewer or other wastewater arrangements before fixing the building footprint. Check the title and deposited plan for easements and restrictions, identify utility assets before excavation and obtain relevant authority requirements. A design that physically fits between existing structures may still conflict with infrastructure, legal access or approval controls.
Use official mapping to identify matters requiring further investigation, but discuss a hazard or overlay only after it is verified for the parcel. Where an official property search identifies a relevant issue, incorporate the required specialist assessment and design response before tendering. This avoids asking builders to price an incomplete or misleading scope.
BASIX addresses water, energy use and thermal performance for applicable residential development. Integrate its commitments into orientation, glazing, shading, insulation, ventilation, fixtures and services rather than treating the certificate as a final administrative step. The Planning Portal provides specific secondary-dwelling BASIX classification guidance for conversions, new secondary dwellings and projects involving new principal and secondary dwellings together.
Ensure BASIX commitments appear consistently in the drawings, specification, contract and installed work. Prefabricated or relocatable construction does not avoid planning, building, BASIX or occupation requirements. An existing outbuilding also requires approval-history and technical checks before any residential conversion is designed.
Rental and investment considerations
Rental assessment should begin only after confirming lawful approval, construction compliance and occupation certification. A builder’s completion notice, electricity connection or marketing description does not establish that premises may lawfully be occupied.
A secondary dwelling remains legally connected to the principal dwelling on the same lot under this planning pathway. It should not be modelled as a separately titled or independently saleable property. Owners should check with their lender and insurer whether the proposed construction, shared title and intended occupancy are acceptable before committing to the project.
If the approved premises will be rented under a residential tenancy, use current NSW Fair Trading guidance on residential tenancy agreements and the current Residential Tenancies Act 2010. Confirm the applicable agreement, bond process, condition report, disclosure, repairs, safety obligations and notice requirements.
Do not assume that family occupation, a licence, a boarder arrangement, short-term accommodation and a standard residential tenancy are regulated identically. The intended arrangement may require separate planning, tenancy, insurance or legal advice.
For practical management, document access, parking, waste storage, garden care, shared paths, maintenance access and responsibility for common services. Check the legal requirements for metering or recovering utility charges before adopting an on-charging arrangement. Privacy and noise separation should be resolved in the design rather than left to tenancy management.
The small 2021 Census counts for Craigie do not provide a reliable basis for current rental-demand or return claims. Obtain current, genuinely comparable local evidence and distinguish advertised asking prices from achieved rents. Test finance, insurance, tax and property-management assumptions with appropriately qualified advisers using the owner’s actual circumstances.
Choosing a granny-flat builder
Identify the legal entity that will sign the building contract, then use the Service NSW facility to check the builder or tradesperson licence. Confirm that the licence is current, its category covers the proposed work and the entity and licence number match the contract. An ABN, industry membership, online review or salesperson’s business card is not a substitute for a valid licence.
Seek recent references for comparable secondary-dwelling work, particularly projects with similar construction, access and servicing conditions. Where possible, inspect completed work with the owner’s permission. Ask references about communication, site-cost changes, variations, defects, documentation and after-completion support.
Give each tenderer the same drawings, specification, reports and request for quotation. Compare:
- included and excluded work;
- provisional sums, allowances and site assumptions;
- excavation, retaining and access responsibilities;
- stormwater, wastewater and utility connections;
- approvals, certification and inspection responsibilities;
- BASIX products and installation obligations;
- variation and extension-of-time procedures;
- defects, statutory warranties and contractual warranties; and
- occupation-certificate and handover documents.
Verify the statutory warranty information applicable to the work and ensure the contract does not misdescribe or improperly limit consumer rights. Follow the written-contract, deposit, progress-payment and home building compensation requirements described in the budgeting section. Read the current Consumer Building Guide before signing, check required HBC evidence through the official register and retain the contract, approved variations, payment records and certificates.
Clarify whether the price is based on an approved construction package or an early concept. If planning or certification changes the design, request a revised documented scope rather than comparing the old price with quotations for different work. Record who will coordinate consultants, answer council or certifier requests, arrange inspections and compile handover evidence.
Assess the complete delivered scope rather than selecting the lowest headline amount. Large exclusions, uncertain service allowances or unclear approval responsibilities can make quotations difficult to compare. Builder selection should rely on current register checks and project-specific evidence, not an unsupported ranking or endorsement.
Planning and feasibility checklist
- Confirm the address, lot and deposited plan.
- Verify the legal title and approved principal dwelling.
- Confirm the responsible council or consent authority.
- Check zoning and mapped controls in the Spatial Viewer.
- Identify the current local and state planning instruments.
- Obtain title, survey, approval-history and service information.
- Check easements, restrictions, access and drainage arrangements.
- Verify only the constraints shown for the parcel.
- Define the proposal as internal, attached, detached or conversion work.
- Test both approval pathways with council or a registered certifier.
- Confirm applicable design standards and BASIX classification.
- Obtain required reports, fees and contribution information.
- Compare itemised quotations on a consistent scope.
- Check licences, contract terms, warranties and HBC evidence.
- Obtain approval before construction starts.
- Follow certification, inspection and approval conditions.
- Obtain the occupation certificate before occupation or use.
- Establish the correct tenancy process before renting.