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. The legal classification comes from the proposal and its approval documents, not from a builder’s product name or the building’s appearance.
This guide separates the few verified facts available for Duramana from statewide planning guidance. The Australian Bureau of Statistics locality covers approximately 130.7116 square kilometres and contains two mesh blocks. Its recorded local-government-area overlap is Bathurst. These are statistical geography facts, not evidence of a parcel’s zoning, responsible council, constraints or development rights.
Any proposal therefore needs an address-level investigation. The NSW secondary-dwelling guidance explains the statewide framework, while the legal parcel, current planning instruments, title, services, approval history and mapped controls determine what can be pursued at a particular property.
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Local granny-flat overview
Duramana is identified by the ABS as Suburbs and Localities code SAL11333. SAL means the ABS Suburbs and Localities geography. SAL boundaries are statistical approximations derived for Census and other statistical outputs; they are not cadastral boundaries, planning zones or proof that a legal parcel is administered by a particular council. SAL must not be confused with SA1 or expanded as Statistical Area Level 1.
The canonical spatial record places the Duramana SAL within the statistical LGA named Bathurst. The formal council organisation identified in the verified source pack is Bathurst Regional Council. The ABS LGA name and the council’s corporate name perform different functions. Although this overlap is useful for orientation, owners must confirm the responsible authority for the lot and deposited plan rather than relying on locality overlap alone.
The 2021 Census QuickStats for Duramana recorded 248 people, a median age of 47 and 100 private dwellings. These values are historical 2021 Census context only. They do not describe the current population, housing supply, rental demand, property market or planning capacity, so using them to estimate rent, occupancy or project feasibility would be unsafe.
Under the statewide definition, a secondary dwelling operates with a principal dwelling on the same site. Both remain on one lot, and the secondary-dwelling pathway does not create a separately subdividable, separately titled or independently saleable residence. Anyone seeking a different ownership or development arrangement needs advice about the correct planning classification before preparing plans.
The first property questions are whether the principal dwelling is lawfully established, which zone applies and whether the use is permitted under the current instruments. State guidance identifies residential zones in which secondary dwellings are permitted and notes that a local environmental plan may permit them in other zones. Permissibility is not approval. Rural and non-residential land must be assessed under its actual local provisions rather than residential assumptions.
An internal conversion, attached addition and separate building can all raise different design, BASIX and certification issues. An existing garage, shed or studio is not approved accommodation merely because it physically fits a proposed layout. Check its approval history, lawful current use, structural condition and any required change of use before treating conversion as feasible.
Council rules and approval pathway
A legal parcel verified as being within the Bathurst region may be subject to the Bathurst Regional Local Environmental Plan 2014, which is identified on the council’s Local Environmental Plans page. Its applicability, zoning and maps must be confirmed for the parcel. The current development control plan, site-specific instruments and state policies should also be checked; statistical locality overlap is not enough to establish that any one instrument applies.
Begin with the NSW Planning Portal Spatial Viewer to identify the parcel, zoning, applicable instruments and mapped planning layers. Then reconcile that information with the title and deposited plan, a survey, approval records and current council advice. Check easements, covenants or restrictions, legal access, sewer and drainage assets, utility locations and relevant property-specific constraints. Planning approval does not necessarily displace private title restrictions.
There are two potential approval pathways:
- A development application is assessed by the responsible council against applicable planning instruments, controls and site impacts. Council provides an ePlanning application route, while the state also explains online development applications.
- A complying development certificate may be issued by council or an appropriately registered certifier only when every relevant standard and exclusion is satisfied. The official complying-development guidance describes this as a standards-based pathway. A certifier cannot waive an exclusion or planning control.
For the Housing SEPP complying-development pathway, official guidance identifies a lot area of at least 450 square metres, except where the secondary dwelling is located entirely within an existing dwelling house. This is one bounded eligibility test, not a universal minimum for a council-assessed application and not sufficient by itself. Check the current Housing SEPP 2021, including Schedule 1, together with the Codes SEPP, mapped exclusions and all site standards.
The current instruments contain controls dealing with matters such as floor area, setbacks, height, landscaping, site coverage and earthworks. The applicable standards depend on the property and pathway, so figures from old guidance, another council or a different development type should not be reused. State guidance says the Housing SEPP does not itself require additional parking for a secondary dwelling, but existing consent conditions, loss of approved parking, access design, driveway safety and vehicle-crossing requirements still need review.
Confirm council submission requirements, contribution plans, fees, waste arrangements, stormwater policy and relevant water or sewer authority processes before lodging. A concept plan, quote, BASIX certificate or builder statement is not planning approval. After approval, the project may require construction certification, inspections and evidence that conditions have been met. Service NSW explains that an occupation certificate is required before occupying or using a new building or changing an existing building’s use.
Costs and budgeting
No verified Duramana construction rate, council fee or servicing allowance is available in the supplied evidence. Build the budget from the surveyed property, documented scope and confirmed approval pathway instead of applying an advertised average. Request itemised, like-for-like quotes based on consistent drawings, specifications, reports and site assumptions.
Include separate allowances for:
- title, survey, service-location and preliminary investigations;
- design, engineering and specialist reports;
- application, Planning Portal, council and certifier charges;
- contributions where an applicable plan requires them;
- demolition, excavation, retaining, ground treatment and spoil removal;
- construction, fixtures, finishes and BASIX commitments;
- utility, sewer, drainage and stormwater connections;
- access, paths, fencing, landscaping and other external works;
- inspections, certificates, insurance and handover documents; and
- contingency matched to unresolved project risks.
Slope, ground conditions, machinery access, service distances, existing structures and finish selections can materially alter the scope. A conversion may require structural upgrades, waterproofing, insulation, ventilation, fire-safety work and new services. It should not be assumed to cost less than new work without investigation.
Each quote should identify inclusions, exclusions, provisional sums, prime-cost items and responsibility for approvals, BASIX, engineering, authority applications and final certification. Verify current fees directly with the relevant authority. Do not rely on undated allowances or describe a package as all-inclusive unless its assumptions and exclusions are documented.
Current Building Commission NSW contract guidance says residential building work costing more than $5,000 requires a written contract, and work costing more than $20,000 requires the more extensive large-job contract. It also states that the maximum deposit is 10 per cent. Read the Consumer Building Guide, document agreed progress stages and obtain advice before accepting unclear risk allocations.
Home building compensation cover is required in the circumstances identified by official guidance for residential building work valued at $20,000 or more, including GST. Obtain the project-specific certificate and verify it through HBC Check before making a payment where cover is required. Recheck the current contract and insurance rules when procuring the work.
Design and site considerations
Start design after the parcel, survey and likely approval pathway have been established. Position the secondary dwelling in a workable relationship with the principal dwelling, considering access, privacy, overlooking, daylight, ventilation, noise, private open space, waste storage, clothes drying and maintenance. A plan can fit geometrically yet create poor amenity or impractical service access.
Apply the design controls identified through the property verification described above. Resolve boundaries, easements, trees, earthworks and lawful connection points before fixing the footprint. Where an official map or property record identifies a relevant hazard or overlay, obtain the report or specialist input required for that issue. The locality record itself provides no evidence that a particular Duramana parcel is affected by bushfire, flooding, heritage, biodiversity, contamination, mine subsidence or another constraint.
Services warrant early technical investigation. Confirm the capacity and location of sewer or an approved on-site wastewater system, water, electricity and telecommunications. Establish a lawful stormwater strategy suited to the site rather than relying on an informal outlet or directing runoff towards neighbouring land. If a second dwelling is proposed to use existing infrastructure, obtain authority and technical confirmation that the arrangement is acceptable.
BASIX addresses water, energy use and thermal performance for residential development. Integrate its commitments into orientation, glazing, insulation, fixtures and services rather than adding them after the plans are complete. The Planning Portal BASIX overview explains the framework, while its secondary-dwelling project guidance distinguishes conversions, new attached or separate work, and projects involving new principal and secondary dwellings together.
Prefabricated, modular or relocatable construction does not bypass planning, building, BASIX or certification requirements. Carry the approved plans, engineering details, BASIX commitments and consent or certificate conditions into the building contract. During construction, manage changes through the certifier and approval process rather than allowing site variations to depart informally from the approved design.
Rental and investment considerations
Consider rental use only after confirming lawful approval and obtaining the required occupation documentation. Retain the approval, stamped plans, certificates, warranties and inspection records so the authorised use and completed work can be demonstrated to insurers, managers, future purchasers and authorities.
If the dwelling is rented under a residential tenancy, follow current NSW Fair Trading guidance on residential tenancy agreements and the Residential Tenancies Act 2010. Use the current agreement and required information, and follow applicable processes for bonds, condition reports, repairs, safety, access, rent and ending a tenancy.
Do not assume that occupation by family, a licence, short-term accommodation, room letting and a standard residential tenancy are legally equivalent. The approved planning use may also affect what is lawful. Obtain advice specific to the proposed arrangement before advertising or granting occupation.
Plan how occupants of both dwellings will use access, outdoor areas, mail, waste facilities and shared spaces. Document maintenance responsibility and arrangements for electricity, water, internet and other services. Separate metering may be considered, but authority requirements, tenancy rules, technical feasibility and installation scope must be checked.
The supplied official evidence contains no current Duramana rent, vacancy, yield or market-performance data. The historical Census figures should not be used as a substitute. For a non-promissory feasibility assessment, obtain current comparable evidence and distinguish advertised asking rents from completed rental transactions. Seek advice suited to the owner’s circumstances on lending, insurance, taxation, legal obligations and property management, and account for maintenance, compliance and periods without rent.
Choosing a granny-flat builder
Undertake preliminary planning and site investigations before requesting final tenders so builders price the same realistic scope. Identify the exact legal entity offering to contract and verify its licence status, category and conditions through the official builder and tradesperson licence check. An ABN, association membership, advertisement or review score is not a substitute for a current register check.
Ask for recent references involving comparable secondary dwellings, approval pathways, access conditions and servicing work. Where practical, inspect completed projects and speak directly with owners about communication, supervision, variations, defects and handover. References supplement rather than replace licence, contract and insurance checks.
Issue each tenderer with the same survey, drawings, specification, consultant information and known approval conditions. Compare:
- the contracting entity and nominated licensed supervisor;
- inclusions, exclusions, provisional sums and prime-cost items;
- excavation, retaining, spoil removal and access assumptions;
- service connections, stormwater and external works;
- responsibility for approvals, BASIX, engineering and certification;
- progress stages, delay provisions and variation procedures;
- defect rectification, statutory warranty information and other warranties; and
- required certificates, manuals and occupation-certificate support.
Use the appropriate written contract and read the Consumer Building Guide before signing. Ensure the plans and specification form part of the agreement, leave no blank sections and record representations that are material to the decision. Keep progress payments aligned with completed work and document variations in accordance with the contract before varied work proceeds, except where urgent legal or safety circumstances require otherwise.
Where home building compensation cover applies, check the certificate against the contractor, site and project before payment. Confirm current statutory warranty information and understand which obligations apply to the contracted work. Keep approvals, contracts, certificates, invoices, inspection records and correspondence. Before final payment, inspect the work, record defects and collect warranties, compliance documents and handover material needed by the certifier and owner.
Planning and feasibility checklist
- Confirm the address, lot and deposited plan.
- Verify the responsible council and lawful principal dwelling.
- Check zoning, instruments and mapped controls in the Spatial Viewer.
- Obtain the title, survey, approval history and service information.
- Investigate easements, restrictions, access, drainage and relevant constraints.
- Define the proposal as internal, attached, separate or a conversion.
- Test both approval pathways against current instruments and exclusions.
- Confirm design controls, BASIX classification and required reports.
- Check council, certifier, authority, fee and contribution requirements.
- Compare complete, itemised quotes on a consistent scope.
- Verify licences, contract terms, warranties and required HBC cover.
- Obtain approval before work and arrange required inspections.
- Obtain the occupation certificate before occupation or use.
- Use current tenancy documents if the dwelling will be rented.