NSW new-home planning guide
A successful new home starts with the land, approval pathway and complete project budget—not the finishes. Before construction, align the brief, site information, design, BASIX commitments, builder, contract, insurance, certification and delivery records.
Reviewed against current NSW guidance: August 2026
When building a house in NSW, make the major decisions in the right order: understand the block, define the household brief, test the budget, establish the planning and certification pathway, coordinate the design, verify the builder and contract, then control construction changes and handover evidence.
A project-home package can simplify parts of that process, but the owner should still understand what the price includes, what the site may add, who is responsible for approvals and consultant documents, and what must be completed before work or payments begin. For the legal framework behind these checks, see SCE’s guide to home building legislation in NSW.
Confirm the survey, levels, access, services, easements, drainage and stormwater constraints, trees, neighbouring conditions and relevant planning controls. Depending on the block, flooding, bushfire, contamination, slope, rock or geotechnical conditions can materially affect the design and cost.
Define room needs, accessibility, storage, daylight, privacy, future flexibility, vehicle access, outdoor use and maintenance expectations. Separate essential outcomes from preferences so cost decisions do not erode the core purpose of the home.
Allow for more than the advertised house price: site investigations, design and consultants, authority and certifier fees, demolition or clearing, excavation, retaining, service connections, external works, finance, temporary arrangements, selections and a reasoned contingency.
A new house will generally proceed through a development application or, where all relevant standards are met, a complying development certificate. If a DA is required, a construction certificate is also needed before building work starts. Confirm the pathway for the actual property rather than assuming a neighbouring approval applies.
Align architecture, structure, civil and stormwater requirements, building services, access, waterproofing, ventilation, thermal comfort, materials and construction sequencing. NSW BASIX requirements form part of the approval process and the certificate commitments must be reflected in the plans and delivered work.
Check the contractor’s current NSW licence, licence category, entity name and relevant experience. Residential work over $5,000 requires a written contract; work over $20,000 requires the more detailed large-jobs contract and, unless exempt, project-specific Home Building Compensation cover before work or payment.
The owner appoints the principal certifier when one is required; the builder cannot appoint or influence that choice. The certifier performs statutory inspections and decides whether an occupation certificate can be issued, but is not the project manager or site supervisor.
Set decision dates, inspection points, progress-payment evidence, variation controls, practical-completion criteria, defect closeout and handover documents before work accelerates. A new building must have an occupation certificate before it is occupied.
The contract should match the approved and coordinated scope. If an important item sits only in a sales conversation, allowance or assumption, it may not be priced or delivered as expected.
| Scope and documents | Confirm the drawings, specifications, engineering documents, schedules and selections that form the contract. Identify who obtains each approval, certificate, report and authority connection. |
|---|---|
| Price and allowances | Separate fixed items from provisional sums and prime-cost items. Understand site-cost assumptions, exclusions, escalation or delay clauses and the circumstances in which the price can change. |
| Licence and entity | Verify that the licensed entity named on the NSW public register is the entity entering the contract and that the licence covers the contracted work. |
| Deposit and payments | NSW guidance states that a home building deposit must not exceed 10% of the contract price. Progress-payment stages should correspond to work actually completed. |
| HBC cover | For applicable residential work over $20,000, obtain and verify the project-specific Home Building Compensation certificate before paying a deposit or allowing work to start. |
| Variations and delays | Use the written variation process. Record scope, price and time impacts before changed work proceeds, except where immediate action is genuinely required for safety or legal compliance. |
Sydney Contracting Engineers is a highly qualified, skilled and experienced construction team with broad building and civil capability. For an authorised scope, SCE can support constructability, staging, site logistics, material coordination, quality records and coordinated delivery.
SCE does not replace the owner’s independent legal or financial advisers, the appointed certifier, or any designer or engineer required for the project. The supported role, licence and practitioner responsibilities must be confirmed for the actual building, approval pathway and contract.
Review SCE’s building services, delivery system, project experience and project tools.
Check the survey and title information, planning controls, easements, services, access, stormwater conditions, trees and material hazards such as flooding, bushfire, contamination, slope or difficult ground. A Section 10.7 planning certificate and project-specific professional advice can help identify constraints.
Most new houses use either a development application or a complying development certificate. A CDC is available only when the proposal and land meet all relevant standards. The correct pathway must be confirmed for the exact property and design.
Yes. NSW Planning guidance states that new homes must meet BASIX requirements for water, energy and thermal performance. The BASIX certificate forms part of the approval process and its commitments must be shown in the plans and delivered work.
Allow for the house contract plus site investigations, design and consultant fees, approvals and certification, demolition or clearing, excavation and retaining, service connections, external works, finance, selections, temporary arrangements and a suitable contingency.
Use the Service NSW licence check to verify the current licence, category, entity name and details. Also assess relevant completed work, references, contract clarity, insurance evidence, delivery systems and the people who will manage the project.
No. NSW Government guidance says the owner appoints the principal certifier when one is required, and the builder cannot appoint or influence that choice. The certifier performs statutory functions but does not manage the builder or supervise the site for the owner.
References were checked on 26 August 2026. Use current approval, contract and professional advice for a live project.
