Before a NSW sale contract is released, the seller should identify every significant renovation, compare the completed work with council, certifier and strata records, and obtain legal advice on disclosure. Missing approval is not one uniform problem. The response may involve finding existing records, obtaining technical reports, seeking a Building Information Certificate, rectifying work, reversing an alteration or clearly addressing the issue in the contract.A renovated Sydney house can look ready for market while its documentary history remains incomplete.The rear extension may have an approval number but no final occupation record. A garage may now function as a bedroom without evidence that the change of use was authorised. A bathroom may have been moved, a wall removed or a deck enlarged without any plans being retained. In a strata property, the work may have council approval but no owners corporation resolution, by-law or acoustic documentation.These are not identical conditions. Treating all of them as “unapproved renovations” can lead to the wrong response, unnecessary expenditure or an incomplete contract.The work before listing is therefore an evidence and project-sequencing exercise. The physical property, planning records, strata records, contractor documents and proposed marketing statements must tell the same story before buyers are invited to rely on them.“Unapproved” Is a Risk Classification, Not a DiagnosisThe first task is to determine what is actually missing. A renovation can fall into several materially different categories.Work May Have Been ExemptWhat may have happenedThe alteration may not have required development consent, subject to its date, dimensions, location and applicable controls.What should be checkedPlanning controls, construction details, property constraints and the rules applying when the work was completed.Likely responseObtain planning or certification advice and preserve the supporting assessment.Approval Exists but Records Are IncompleteWhat may have happenedDevelopment consent or a complying development certificate may exist, but approved plans, inspection records or final certificates cannot be located.What should be checkedCouncil files, NSW Planning Portal records, certifier records and documents held by previous owners or contractors.Likely responseReconstruct the approval file before assuming the work was unlawful.The Built Work Differs From the ApprovalWhat may have happenedThe extension, windows, roofline, room arrangement or footprint may not match the stamped plans.What should be checkedAn as-built survey, measured drawings, engineering review and comparison with the approved documents.Likely responseObtain advice on rectification, a Building Information Certificate, future-use approval or removal of the variation.No Relevant Approval Can Be IdentifiedWhat may have happenedWork requiring approval may have been completed without a valid development, construction or complying development pathway.What should be checkedPlanning permissibility, structural adequacy, fire safety, waterproofing, setbacks, drainage and current use.Likely responseEscalate to the conveyancer, planner, certifier and relevant technical consultants before the contract is finalised.Strata Approval Is MissingWhat may have happenedThe owner may have altered flooring, waterproofing, walls, windows, services or common property without the required strata authority.What should be checkedBy-laws, meeting minutes, renovation approvals, lot boundaries, common-property responsibility and supporting specifications.Likely responseSeek strata and legal advice on retrospective approval, responsibility, disclosure and possible reinstatement.The Use Changed Without Clear AuthorityWhat may have happenedA garage, outbuilding, storage room or lower-ground area may now be represented as habitable accommodation.What should be checkedApproved use, ceiling height, ventilation, fire safety, waterproofing, access, parking obligations and occupation documentation.Likely responseAvoid marketing the space as an approved bedroom or living area until the position is verified.This classification should occur before the seller commits to cosmetic improvements. Repainting an unverified conversion or installing new flooring through an unauthorised room may improve presentation while making later investigation, rectification and cost allocation more difficult.Build the Renovation Chronology Before Finalising the ContractSellers are often asked when work was completed, who carried it out and whether council approved it. Those questions are difficult to answer accurately when renovations were undertaken by several owners over many years.A practical chronology should separate confirmed facts from assumptions. It can include:The approximate date of each alteration or addition.Whether the current owner commissioned the work.The builder, designer, engineer, certifier or owner-builder involved.Development consent, complying development and construction certificate references.Approved plans, modifications and inspection records.Occupation certificates or other completion documents.Structural, waterproofing, glazing, electrical and plumbing certificates.Home building compensation insurance records where applicable.Strata approvals, by-laws, meeting resolutions and acoustic reports.Council correspondence, notices, orders, complaints or prior Building Information Certificates.Repairs, water ingress, cracking, drainage or movement associated with the work.This chronology is different from the standard document list used to prepare a contract. Elyment’s guide to the documents a conveyancer may need before a NSW sale contract goes out explains the broader transaction file.The renovation chronology is a focused record that helps the project team identify where the documented property and the constructed property may diverge.The Physical House Must Be Compared With the Approved HouseFinding an old development consent does not complete the review. The consent and stamped plans must be compared with what was actually built.Differences that commonly matter include:A deck extending beyond the approved footprint.A roof or awning added after the original approval.Windows or doors inserted into a different elevation.A garage door replaced with a wall and residential windows.A bathroom or kitchen installed in an unapproved room.Load-bearing walls removed or openings widened.Floor levels, drainage falls or retaining structures altered.Balconies enclosed or habitable rooms created beneath them.A detached studio used as a separate dwelling.Air-conditioning, plumbing or exhaust systems passing through common property.A seller should not attempt to resolve those questions from real estate photographs alone. Depending on the work, the review may require measured drawings, a survey, engineering input, a building inspection, a planning assessment or specialist testing.The objective is not to produce a perfect archive of every maintenance activity. It is to identify changes that could affect planning status, structural performance, fire safety, waterproofing, lawful use, strata responsibility or the way the property is marketed.A Building Information Certificate Is Not Retrospective Development ApprovalA Building Information Certificate, commonly called a BIC, may become relevant when unauthorised building work is suspected.The NSW Planning Portal guidance on Building Information Certificates explains that an application is made to the relevant local council and may be used where work has already been erected without the appropriate approval pathway.The distinction is important. A BIC does not retrospectively grant development consent or legitimise the original construction. Its function is to limit specified council compliance action in relation to the building or part covered by the certificate.Council may request material such as:As-built architectural plans.A registered survey.Structural engineering certification.Fire-safety information.Waterproofing or drainage evidence.Planning assessments against relevant controls.Rectification work identified during inspection.A BIC should therefore not be treated as a quick administrative attachment that can be ordered after the photography is booked. The application may reveal additional design, inspection and rectification requirements. The property campaign should account for that uncertainty.A BIC may also address only part of a building. Sellers and buyers need to understand precisely which structure, room or work the certificate covers, rather than referring generally to the whole property as “council certified”.The Contract and the Marketing Campaign Must Use the Same FactsNSW Government guidance states that prescribed documents must be included in a sale contract, including title and plan material, a drainage diagram, a current section 10.7 planning certificate and the prescribed cooling-off statement. Missing prescribed documents can give a purchaser rescission rights in certain circumstances.Sellers can review the NSW Government steps for preparing and issuing a property sale contract, but the legal representative should decide how known renovation issues, notices, orders, missing approvals or qualifications are addressed in the contract.This review should be completed before marketing descriptions are approved. The contract should not describe the property one way while the agent, floor plan and online advertisement imply something more favourable.“Four-Bedroom House”Evidence required before useEvidence that each represented bedroom is lawfully approved and reasonably capable of the stated use.Safer operational approach when unverifiedRefer uncertain rooms to the legal representative and describe them accurately without assuming approval.“Council-Approved Extension”Evidence required before useRelevant consent, approved plans and evidence that the completed work corresponds with them.Safer operational approach when unverifiedDo not use the claim until the approval and as-built position have been reconciled.“Fully Renovated”Evidence required before useA clear understanding of the scope, date, contractors, approvals and significant unresolved defects.Safer operational approach when unverifiedUse specific, supportable descriptions of completed finishes and inclusions.“Self-Contained Studio”Evidence required before usePlanning approval for the building and its use, together with relevant servicing, fire-safety and occupation records.Safer operational approach when unverifiedAvoid implying separate lawful accommodation or rental capability without evidence.“Approved Strata Renovation”Evidence required before useOwners corporation approval, relevant by-law or resolution and any required council or certifier documentation.Safer operational approach when unverifiedIdentify which approvals exist and avoid combining separate council and strata processes into one general statement.NSW guidance for property agents states that advertisements must not create a false impression and that silence or omissions can be misleading in some circumstances. Agents should obtain information from the vendor or refer technical and legal questions to the appropriate adviser rather than improvising an answer.The relevant principles are outlined in the NSW Government guidance on misrepresentation by property agents.Strata Renovations Require a Separate Approval ReviewSelling an apartment, townhouse or strata duplex introduces a second approval system. Council or certifier records do not automatically prove that the owners corporation authorised the work.Depending on the scheme, relevant work may include:Replacing carpet with hard flooring.Removing tiles, screed or magnesite.Changing bathroom waterproofing or plumbing.Altering walls, doorways, windows or balcony components.Installing air-conditioning through external walls.Changing electrical, exhaust or fire-safety services.Performing work that affects common-property slabs or membranes.The NSW strata renovation rules explain that approval requirements differ according to the character of the work. Owners corporations are also required to retain records of approved minor renovations for the prescribed period.A seller should obtain the current by-laws, relevant resolutions, meeting minutes and any renovation application. The review should also establish whether the approval was conditional on acoustic ratings, waterproofing certificates, contractor insurance, working hours or future maintenance obligations.Elyment’s analysis of the risks attached to buying a unit with unapproved flooring examines the purchaser’s perspective.For a seller, the operational lesson is to resolve the flooring record before buyers obtain a strata report and identify the issue independently.Pool and Spa Alterations Need Their Own Contract CheckA pool or spa can create both renovation and mandatory contract-document issues.NSW Government guidance states that, subject to specified exceptions, a sale contract for a property with a pool or spa must include registration evidence and one of the recognised compliance, occupation or non-compliance documents.Sellers should review:Whether the pool or spa is registered.The validity and scope of the current certificate.Whether fencing was changed during landscaping or building work.Whether a deck, retaining wall, door or window affects the barrier.Whether the pool itself required and received planning approval.Whether outstanding defects must be rectified by the seller or purchaser.The current requirements are explained in the NSW pool and spa owner obligations.Pool documentation should be requested early. An inspection may reveal defects requiring gate, fence, landscaping or access changes, which can affect both photography and the proposed settlement arrangement.Owner-Builder History Can Change the Contract RequirementsSellers should determine whether an owner-builder permit was issued for any recent work, even when the present owner did not carry it out.NSW Government guidance explains that when a property is sold within seven years and six months after an owner-builder permit was issued, the contract may need a conspicuous consumer warning. The warning identifies the permit and explains the insurance position applying to owner-builder work.The requirements and statutory warranty implications are outlined in the NSW Government information on selling an owner-builder constructed home.The review should also identify home building compensation insurance certificates for contractor work where they were required. The absence of documents does not prove that insurance never existed, but it should trigger a targeted search rather than an assumption.Four Possible Paths: Verify, Rectify, Disclose or RemoveOnce the evidence has been assembled, the project team can decide which response is proportionate. More than one path may be required.Verify Existing ApprovalWhen it may be appropriateRecords appear incomplete, but council, certifier or strata documentation may still exist.Operational implicationsPrioritise file searches, plan comparison and written confirmation before commissioning physical work.Rectify and Obtain Further DocumentationWhen it may be appropriateThe work may remain, but defects or departures need to be corrected before a certificate or satisfactory assessment is possible.Operational implicationsAllow for design, trade access, demolition, rebuilding, inspection, curing, testing and reinspection.Disclose and Allocate the Risk ContractuallyWhen it may be appropriateThe issue cannot be fully resolved before sale, but the legal and technical position can be described accurately.Operational implicationsThe conveyancer may need supporting reports, special conditions, acknowledgements or negotiated settlement obligations.Remove or Reinstate the AlterationWhen it may be appropriateRetaining the work is impractical, unsafe, uneconomic or unlikely to achieve the required outcome.Operational implicationsDefine demolition, waste removal, service disconnection, substrate restoration, finishing and evidence of completion.A legal disclosure does not repair defective construction. Equally, a physical repair does not automatically resolve missing planning, strata or contract documentation. The legal and physical workstreams need to be coordinated.Where Physical Renovation Work Enters the Sale ProgrammeUnapproved work often becomes visible only after finishes are lifted or an area is opened for inspection. That is where project coordination matters.For example:Carpet removal may reveal a former wall line, patched structural opening or undocumented change to a bedroom.Tile removal may expose inadequate falls, missing waterproofing interfaces or plumbing routes that do not correspond with the plans.Flooring removal in a strata apartment may reveal work to the slab, magnesite, acoustic underlay or common-property components.Concrete grinding or levelling may be needed after an unauthorised wall, kitchen island or raised platform is removed.A garage reinstatement may require removal of internal finishes, correction of floor levels, service alterations, new doors and painting.A deck or enclosure may require controlled demolition, drainage correction, façade repair and weatherproofing.The scope should distinguish investigation from permanent work. Opening a diagnostic test area is not the same as authorising full demolition. Each test should have a defined location, protection method, reinstatement allowance and decision point.Where buyers have already raised defects, sellers may also review Elyment’s guide to negotiating repairs before exchange in a Sydney property transaction.That negotiation is more manageable when the seller already has a documented scope, cost range and realistic completion programme.Do Not Set the Auction Date Before the Compliance Path Is UnderstoodAuction campaigns compress the available decision period. Buyers generally have no cooling-off period when purchasing at auction, so legal representatives may scrutinise uncertain renovations before their clients are prepared to bid.A seller preparing for auction should work backwards from the proposed contract-release date, not only from the photography date.Identify the alterations. Complete the property walk-through and renovation chronology.Order the records. Obtain title, council, certifier, planning, strata and insurance material.Compare plans with the property. Commission measured or technical inspections where the difference is material.Select the response. Verify, rectify, disclose, seek a BIC or remove the work.Complete critical physical work. Allow for trade lead times, access, curing, inspections and documentation.Brief the conveyancer and agent. Provide one controlled evidence pack and consistent written instructions.Release the contract and marketing. Confirm that floor plans, room labels, photography captions and agent scripts do not overstate the verified position.Elyment’s analysis of the terms buyers may seek to negotiate before bidding at a NSW auction shows why unresolved matters can become pre-auction negotiation points.Sellers should expect sophisticated buyers to ask for plans, certificates and clarification before the auction, not after it.Cost Planning Should Include the Path to Evidence, Not Just the RepairThe visible construction cost may be only one component of the pre-sale response. A realistic allowance may need to include:Council and records-search fees.Architectural measurement and as-built drawings.Surveying and boundary confirmation.Town planning advice.Structural, fire, hydraulic or waterproofing reports.BIC application and inspection costs.Demolition, waste transport and disposal.Service isolation and reconnection.Substrate repair, grinding and levelling.Flooring, painting and final finishing.Strata application, meeting or by-law costs.Legal drafting and additional contract enquiries.Campaign delay, bridging finance or holding costs.The lowest repair quote is not necessarily the lowest transaction cost. A cheaper scope that cannot be certified, inspected or completed before contract release may create a larger delay than a more comprehensive solution.A Practical Pre-Contract Release GateBefore instructing the agent to distribute the final contract, the seller and advisers should be able to answer the following:Which renovations are visible or known?Which owner commissioned each significant alteration?What approvals, plans and certificates have been located?Does the completed property match those documents?Is any room being used differently from its approved use?Are there council, certifier or strata notices, orders or unresolved correspondence?Does a BIC exist, and precisely what work does it cover?Was an owner-builder permit issued within the relevant period?Are required pool or spa documents available and current?Were strata approvals and by-laws obtained where required?Does the marketing language stay within the verified facts?Has the conveyancer received the full evidence pack?Are rectification obligations and completion dates realistic?Will the property remain in the required condition through settlement?The Contract Should Be the End of the Investigation, Not the StartUnapproved renovation risk is most expensive when it is discovered after the property has been photographed, advertised or placed into an auction timetable.The better approach is to investigate before the campaign becomes difficult to move. Establish what was approved, what was built, what documentation is missing and which statements can be supported. Then coordinate the legal, planning, strata and physical-work responses around one delivery programme.Not every missing document requires demolition. Not every existing structure can be solved by attaching a disclosure. The correct path depends on the work, the property, the approval history, the proposed use and the advice of the professionals responsible for the transaction.RENOVATION EVIDENCE, COMPLIANCE AND SALE READINESSResolve the Renovation History Before the Campaign Controls the TimetableReview physical works, available approvals, strata records, rectification requirements and project sequencing before the final contract and marketing material are released.Request a Pre-Contract Project ReviewThis article provides general information for NSW property owners and project teams. It is not legal, planning, surveying, engineering, certification or financial advice. Obtain advice specific to the property and proposed transaction.Sources and ReferencesElyment: Documents a conveyancer may need before a NSW sale contract goes outNSW Planning Portal: Post-consent certificates and Building Information CertificatesNSW Government: Steps to selling a propertyNSW Government: Misrepresentation by property agentsNSW Government: Strata renovation rulesElyment: Buying a unit with unapproved flooringNSW Government: Pool and spa owner obligationsNSW Government: Selling an owner-builder constructed homeElyment: Negotiating repairs before exchangeElyment: NSW auction contract reviewElyment: Contact