Black Hollow Granny Flat planning starts with the property, current planning controls and a realistic project brief. Use this guide to identify the checks to complete before design or construction commitments are made.
Black Hollow Granny Flat: planning essentials
A well-scoped project considers approval pathways, site constraints, services, budget and long-term use together.
A secondary dwelling (commonly called a granny flat) is a self-contained dwelling established with a principal dwelling on the same lot. It may be within, attached to or separate from the principal dwelling. Its lawful classification depends on its approval and use, not its marketing name, size or construction method. This guide combines limited Black Hollow statistical context with current statewide guidance, but the legal parcel must be investigated before any planning, design or contracting decision.
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This guide is general information only. Obtain property-specific verification of zoning, overlays, title constraints, services and approval requirements before making design, purchase or construction decisions.
Local granny-flat overview
Black Hollow is identified in the canonical locality record as Australian Bureau of Statistics Suburbs and Localities geography SAL 10385, covering approximately 145.486 square kilometres. SAL means the ABS Suburbs and Localities geography. SAL boundaries are statistical approximations designed for Census reporting; they are not cadastral boundaries and do not establish a property’s title, zoning, consent authority or development rights.
The 2021 Census Black Hollow QuickStats reports that no information can be provided because the selected area had no people or a very low population. This is historical 2021 Census context, not evidence of the locality’s current population or property conditions. It means generic claims about local households, housing demand, rents, buyer preferences or investment performance would be unsafe. Address-level planning and current market research are therefore more useful than demographic generalisations for this locality.
The ABS locality-to-LGA data associates the Black Hollow SAL with the statistical LGA named Coonamble. That statistical name must be distinguished from the formal council organisation name, Coonamble Shire Council. The recorded overlap is useful for routing research, but it does not prove which council or consent authority is responsible for a legal parcel. Confirm the address, lot and deposited plan through current cadastral and planning records before relying on council material.
If that parcel check confirms Coonamble Shire Council as the relevant authority, use the council’s official development entry point, local environmental plan route and development control plan material. Their applicability remains conditional on the parcel, current instrument and proposed development being verified.
The statewide starting point is the NSW Government’s secondary-dwelling guidance. It states that the principal and secondary dwellings remain on the same site. The secondary-dwelling framework does not create a separately subdividable, titled or saleable dwelling.
NSW guidance identifies secondary dwellings as permitted in residential zones R1, R2, R3, R4 and R5, with possible permission in other zones where the applicable local environmental plan allows it. Permission in a zone is not approval for a proposal. Rural or non-residential land must be considered under the relevant local environmental plan rather than residential-zone assumptions, including any locally adopted rural controls.
For the actual property, establish the current zone, applicable planning instruments and lawful status of the principal dwelling. Obtain the title, deposited plan, survey and approval history. Check easements, covenants, restrictions, legal access, drainage and sewer assets, utility locations and any address-specific mapped controls. Planning approval does not necessarily override private title restrictions. Use the NSW Planning Portal Spatial Viewer as a screening tool, then confirm its results against the current instruments, property records and advice from the responsible authority or an appropriately registered certifier.
Council rules and approval pathway
A secondary dwelling may be assessed through a development application or, when every applicable requirement is satisfied, as complying development. The correct pathway depends on the legal parcel, existing development, proposed work and current planning controls.
Under the development-application pathway, the responsible council assesses the proposal against the applicable local environmental plan, development control plan, State policies and relevant impacts. Service NSW provides an official development-application overview and lodgement route. If parcel checks confirm Coonamble Shire Council as the authority, its development-application process guidance is the relevant local starting point, subject to checking current application requirements.
Complying development is a standards-based approval pathway. A complying development certificate may be issued by a council or registered certifier only if the land and proposal satisfy every applicable requirement. The official NSW complying-development guidance explains the certifier’s role. A certifier assesses compliance but cannot waive a planning standard or mapped exclusion.
For the Housing SEPP complying-development pathway, NSW 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 criterion, not a universal minimum for a council-assessed application and not sufficient by itself to secure a certificate. The complete proposal must be tested against current Schedule 1 of the State Environmental Planning Policy (Housing) 2021, the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, relevant principal-dwelling provisions and exclusions applying to the land.
The Housing SEPP and its Schedule 1 contain site and floor-area controls. Verify the applicable floor area, setbacks, height, landscaped area, site coverage, earthworks and related standards from the current provisions for the selected pathway. Do not apply a remembered figure from another development type, council area or superseded planning policy.
NSW guidance states that the Housing SEPP does not itself require additional parking for a secondary dwelling. Existing consent conditions, displaced parking, driveway operation, vehicle-crossing requirements and safe access may still affect the design. Council contributions, waste arrangements, stormwater requirements, local fees and water or sewer authority requirements must likewise be checked for the actual application rather than assumed from the locality name.
Confirm whether the proposal is internal, attached or separate and whether it involves converting an existing structure. A garage, shed or studio is not approved for habitation merely because it can physically accommodate residential facilities. Obtain existing approvals and determine whether development consent, building work approval or a change of use is required.
A quotation, concept plan, builder’s opinion or BASIX certificate is not planning approval. After the relevant approval is issued, comply with its construction conditions, certification arrangements and inspections. Service NSW explains that an occupation certificate is required before occupying or using a new building or changing the use of an existing building. Confirm the required inspections and certificates with the appointed certifier.
Costs and budgeting
There is insufficient verified evidence for a reliable Black Hollow construction price. Build the budget from the surveyed property, approved design, service investigations and itemised quotations rather than a generic package price. Access, ground conditions, service distances, conversion work, authority requirements and finishes can materially change the total.
Organise the feasibility budget into:
- title, survey, service searches and necessary specialist investigations;
- planning, design, engineering and other consultant work;
- council, Planning Portal and certifier charges;
- contributions or authority fees where confirmed as applicable;
- demolition, earthworks, foundations and site preparation;
- construction, fixtures, finishes and BASIX commitments;
- water, wastewater, electricity, drainage and telecommunications work;
- driveways, paths, retaining work, landscaping and site restoration;
- certification, insurance, defects and handover requirements; and
- a separately identified allowance for unresolved scope risks.
Ask each supplier to price the same drawings, specification and site information. Separate fixed inclusions from exclusions, provisional sums, prime-cost items, owner-supplied work and assumptions about soil, access or service capacity. Check whether transport, cranage, foundations and connections are excluded from modular or prefabricated proposals. Those construction methods do not bypass planning, BASIX, building or certification requirements.
Current Building Commission NSW contract guidance requires a written contract for residential building work above $5,000 and a more extensive large-job contract for work above $20,000. It identifies a maximum deposit of 10 per cent. Read the current Consumer Building Guide, verify which contract requirements and statutory warranties apply, and keep progress payments aligned with completed contractual stages.
Home building compensation requirements also need direct verification. The official HBC Check guidance applies the cover requirement to residential building work valued at $20,000 or more, including GST. Where cover is required, verify the project-specific insurance certificate through HBC Check before making a payment that should not occur without that evidence.
Black Hollow Granny Flat: council and site checks
Confirm property-specific requirements with the responsible council or certifier before relying on general guidance.
Design and site considerations
Start design with a current survey and the verified planning envelope, not a standard plan selected before the land is understood. Map the principal dwelling, boundaries, levels, access, existing structures, trees and known service assets. Record whether the secondary dwelling will be internal, attached or separate and confirm the lawful status of any structure proposed for conversion.
Arrange the two dwellings so each can function safely and with reasonable amenity. Consider the route from the street to each entrance, privacy between windows and outdoor areas, overlooking of neighbours, daylight, ventilation, private open space, waste storage, clothes drying and maintenance access. Review noise transfer, exterior lighting and the position of equipment such as hot-water or air-conditioning units before fixing the layout.
Test the design standards identified in the council-rules section against the selected approval pathway. For a development application, address relevant impacts and local controls. For complying development, document exact compliance with every applicable standard. A small or prefabricated building remains subject to the controls that apply to its use and construction.
Coordinate services early. Locate sewer, drainage and utility assets and confirm any protection or access requirements. Determine how wastewater, roof water and surface flows will be managed without damaging buildings or adjoining land. Check supply capacity and connection conditions with the relevant providers. Where conventional urban services are unavailable, obtain authority and technical advice before choosing an on-site solution.
Only investigate hazards or overlays that official property information identifies as relevant. The locality record does not show whether a particular lot is affected by flooding, bushfire, heritage, biodiversity, contamination or another constraint. If an address-level control is identified, establish its design consequence and required report with the responsible authority or qualified consultant.
BASIX addresses water, energy use and thermal performance for new residential development. The Planning Portal’s secondary-dwelling BASIX guidance distinguishes conversions, new secondary dwellings and projects delivering principal and secondary dwellings together. Select the correct project type and incorporate its commitments into drawings, specifications and quotations so orientation, glazing, insulation, fixtures and services are coordinated before construction pricing is finalised.
Rental and investment considerations
Confirm lawful approval, satisfaction of relevant conditions and issue of the required occupation certificate before offering a secondary dwelling for residential occupation. Historical family use, utility connections, physical fit-out or a description in a sales listing does not establish lawful residential status. Obtain council and certification records where the approval history is unclear.
Because the secondary dwelling remains on the same lot as the principal dwelling, assess finance, valuation, insurance and future-sale decisions on that title arrangement. Explain the approved development accurately to lenders, insurers and advisers rather than treating it as an independently titled property.
The 2021 Census QuickStats provides no usable demographic profile for Black Hollow, so it cannot support a locality-specific rent or demand estimate. Prospective landlords should obtain current comparable evidence and distinguish advertised asking prices from completed leasing results. Account for vacancy, management, maintenance, insurance, utilities and repairs, and seek advice suited to the owner’s finance and tax circumstances.
Plan how the two households would use access, parking, mail, bins, gardens and shared outdoor areas. Clarify responsibility for maintenance and utilities in the tenancy documents. Separate metering may assist record keeping, but the presence of a meter does not by itself determine whether or how a charge can lawfully be passed to an occupant.
Where the approved dwelling is rented under a residential tenancy, follow current NSW Fair Trading guidance on residential tenancy agreements, including written-agreement and standard-term requirements, and check the current Residential Tenancies Act 2010. Review the applicable rules for bonds, condition reports, repairs, safety, disclosures and landlord access before advertising or signing an agreement.
Do not treat family occupation, boarder arrangements, licences, short-term accommodation and standard residential tenancies as interchangeable. Confirm the planning, tenancy, insurance and tax treatment of the intended arrangement with the relevant authority and qualified advisers.
Choosing a granny-flat builder
Define the design, site information and approval responsibilities before comparing builders. Otherwise, apparently similar tenders may contain materially different assumptions. Require each tenderer to identify the contracting legal entity and the licence intended to cover the work.
Use the official Service NSW builder and tradesperson licence check to verify the licence holder, current status and relevant category. Match the search result to the entity named in the proposed contract. An ABN, association membership, review score or advertising claim is not a substitute for this check.
Seek recent references for comparable secondary-dwelling work and inspect completed projects where permission is available. Ask about approval coordination, occupied-site management, service connections, variations, supervision, defects and handover. Assess the builder’s experience against the actual project rather than relying on general small-building experience.
Compare tenders line by line, including:
- design, engineering, approvals and certification responsibilities;
- excavation, foundations, retaining work and spoil removal;
- utility, sewer, drainage and stormwater connections;
- access, external works, landscaping and making good;
- fixtures, finishes and every documented BASIX commitment;
- exclusions, provisional sums and site-condition assumptions;
- variation and extension-of-time procedures; and
- inspections, defect rectification and handover documents.
Use the appropriate written contract and read the Consumer Building Guide linked from the official contract guidance. Verify that the contract records the approved documents, scope, price basis, payment stages, insurance responsibilities, variation process and applicable statutory warranty information. Obtain independent legal advice where significant provisions are unclear.
Where home building compensation cover applies, match the HBC certificate to the property, builder and contracted work through the official check. Retain copies of the licence search, contract, certificate, approvals, plans, variations, invoices and inspection records.
Before signing, document who will lodge the application, appoint or communicate with the certifier, arrange inspections, satisfy authority conditions and obtain the occupation certificate. Confirm these responsibilities in the contract rather than relying on sales discussions.
Planning and feasibility checklist
- Confirm the address, lot, deposited plan, title and lawful principal dwelling.
- Verify the responsible council or consent authority for the parcel.
- Check zoning and mapped controls in the Spatial Viewer.
- Review the current local environmental plan and development control plan.
- Obtain the title, survey, approval history and service information.
- Investigate easements, restrictions, access, drainage and relevant mapped constraints.
- Define the proposal as internal, attached, separate or a conversion.
- Test both approval pathways with the council or registered certifier.
- Confirm applicable design standards, reports, BASIX documents, fees and contributions.
- Compare complete, itemised quotations on a like-for-like basis.
- Verify licences, contract requirements, statutory warranties and HBC evidence.
- Obtain approval before work and complete required inspections.
- Secure the occupation certificate before occupation or use.
- Use current tenancy documents if the approved dwelling will be rented.
Next steps for your Black Hollow Granny Flat
Before progressing a Black Hollow Granny Flat, compare the evidence in our planning guides and use the NSW suburb finder to locate relevant local guidance.
A successful Black Hollow Granny Flat proposal should be checked against the current planning instrument, title constraints, servicing needs and a documented project budget.