The 10-check pre-offer protocol for any investment property.

The most common cause of poor investment property outcomes is not bad market timing or bad strategy. It is failure to run the basic checks before exchange. A consistent 10-check protocol, applied to every potential purchase, catches 90% of the avoidable mistakes.

This post is the protocol. Each check has a defined purpose, an expected time and cost, and a decision criterion.

Check 1: planning controls

Time: 15-30 minutes per property. Cost: $0.

Purpose: confirm the property is in a stable planning environment without restrictive overlays that limit your investment thesis.

What to check:

• Zone classification and permitted uses
• Height and floor space ratio limits
• Heritage overlay status
• Specific overlays (flood, bushfire, biodiversity, coastal hazard, acid sulfate)
• Adjacent zoning and likely neighbouring development

Decision criterion: the planning controls support the use case (rental, owner-occupier, future redevelopment) you plan. If the controls fundamentally constrain the use case, reject the property.

Check 2: flood and natural hazard

Time: 10-15 minutes per property. Cost: $0.

Purpose: assess natural hazard exposure that affects construction cost, insurance availability, and long-term resilience.

What to check:

• 1% AEP flood mapping
• Bushfire prone area classification
• Coastal hazard mapping (if applicable)
• Acid sulfate soil classification (if applicable)
• Landslide and geotechnical mapping (if applicable)

Decision criterion: hazard exposure is acceptable for the property type and your risk tolerance. For severe hazards (BAL-FZ, 1% AEP flood with no freeboard), reject unless price compensates for cost.

Check 3: contamination history

Time: 10-20 minutes per property. Cost: $0 for desktop check, $3,000-8,000 if Phase 1 ESA required.

Purpose: identify potential land contamination that may require remediation or restrict use.

What to check:

• Historical aerial imagery (1940s onwards) for industrial use
• Council contaminated land register
• State EPA contaminated land database
• Adjacent and upstream land uses

Decision criterion: contamination history is absent or fully remediated with documentation. If active contamination or undocumented history, commission Phase 1 ESA before exchange.

Check 4: water and sewer

Time: 5-10 minutes per property. Cost: $0 for online check, $30-50 for Section 73 search if needed.

Purpose: confirm reticulated water and sewer are available, and check easements and infrastructure on the lot.

What to check:

• Sydney Water / equivalent state utility sewer service diagram
• Water main location and connection point
• Sewer easements crossing the lot
• Stormwater infrastructure

Decision criterion: water and sewer service is straightforward and easements do not materially constrain the use case.

Check 5: title and ownership

Time: 30-60 minutes per property. Cost: $20-50 for title search.

Purpose: verify the seller has clear title and identify any restrictions on the title.

What to check:

• Current title search showing registered owners
• Easements (positive and restrictive) registered on title
• Caveats, mortgages, and other registered interests
• Restrictions (e.g. covenant on use, building envelope)
• Strata or community title documentation if applicable

Decision criterion: title is clear, restrictions are acceptable, registered interests can be cleared at settlement.

Check 6: building inspection

Time: 1-2 hours on-site, 24-48 hours for report. Cost: $400-800.

Purpose: identify structural, functional, or condition issues that affect value or require remediation.

What to check:

• Structural condition (foundations, framing, roof structure)
• Roof and waterproofing condition
• Electrical and plumbing systems
• Pest activity (termite, borer)
• Major mechanical systems (heating, cooling, hot water)
• Recent renovations and their compliance with code

Decision criterion: the property is in expected condition for its age and price point. If major defects identified, either renegotiate price or reject.

Check 7: strata or community title (if applicable)

Time: 1-2 hours review. Cost: $300-500 for strata inspection by professional.

Purpose: assess the financial and operational health of the body corporate or owners corporation.

What to check:

• Capital works fund balance
• Recent and projected levies
• Pending major works
• Recent disputes or litigation
• Insurance currency and adequacy
• By-laws affecting use and short-term letting

Decision criterion: body corporate is financially healthy, no substantial pending levies, by-laws acceptable. If body corporate distressed, reject or substantially renegotiate.

Check 8: rental market

Time: 1-2 hours review. Cost: $0.

Purpose: confirm the rental income assumption underlying your investment thesis.

What to check:

• Recent rental listings in the same suburb for same dwelling type
• Recent leased prices (where available)
• Vacancy rate in the suburb
• Tenant demographic profile
• Property manager conversations (informal estimates)

Decision criterion: realistic rental estimate (median of comparable listings) supports your investment thesis. If actual achievable rental is materially below your assumption, revise the analysis.

Check 9: comparable sales

Time: 2-3 hours review. Cost: $0 for free sources, $200-500 for paid valuation context.

Purpose: confirm the offer price is consistent with market value.

What to check:

• Recent sales of comparable properties in the immediate area
• Adjustments for differences (size, condition, position, orientation)
• Asking-to-sale ratio in current local market
• Sales velocity and time on market

Decision criterion: offer price is within the adjusted comparable sales range. If above the range, document the reason for paying above market.

Check 10: post-purchase cash flow projection

Time: 1-2 hours modelling. Cost: $0 (or financial planner if substantial uncertainty).

Purpose: model the actual cash flow position over the planned holding period.

What to check:

• Rental income (Check 8)
• Operating expenses (property management, council rates, water, insurance, repairs, vacancy allowance)
• Loan servicing (interest and principal)
• Tax position (negative gearing under post-2027 rules)
• Capital growth assumption
• Exit scenario and net proceeds

Decision criterion: the cash flow profile is sustainable for your household. Total net position (cash flow plus capital growth) meets your return threshold.

The protocol in practice

For a typical investment property pre-purchase analysis:

Total time: 8-12 hours of work over 5-10 days.

Total cost: $500-1,500 in inspection and professional fees.

The protocol catches:

• Planning constraint mismatch (Check 1)
• Hazard cost surprise (Check 2)
• Contamination liability (Check 3)
• Title and easement issues (Check 5)
• Building condition surprise (Check 6)
• Strata distress (Check 7)
• Rental income overestimate (Check 8)
• Overpayment risk (Check 9)
• Cash flow unsustainability (Check 10)

The cost of running the protocol is typically 0.1-0.2% of purchase price. The cost of skipping the protocol can be 5-15% of purchase price in the wrong scenarios.

What the protocol does not catch

The protocol catches due diligence failures but not all investment risks:

• Macro market timing risk (broader property cycle)
• Interest rate trajectory uncertainty
• Policy and regulatory change
• Personal circumstance change

These risks require separate consideration via portfolio strategy, hedging, and life-stage planning.

How to integrate the protocol

For active investors looking at multiple properties:

• Run Checks 1, 2, 3, 9 first (the desk research) for every candidate property
• Reject candidates that fail any of these checks
• Run Checks 4-8 only for properties that pass the initial filter
• Commission paid services (Checks 6, 7) only on the final 1-2 candidates

This sequenced approach prevents wasted time on properties that fail early checks.

• Planning & Potential tab: zone, overlays, controls (Check 1)
• Natural Hazards tab: flood, bushfire, coastal (Check 2)
• Heritage & First Nations tab: heritage, archaeology, contamination context (Check 3)
• Suburb Profile tab: median price, recent sales, rental yields (Check 8, 9)

Checks 4, 5, 6, 7, 10 require additional document searches, inspections, and modelling that SafeBuy does not replace.

A SafeBuy report typically delivers 60-70% of the pre-offer due diligence in 15-20 minutes. The remaining 30-40% requires direct document inspection (Section 10.7, title, strata documents), physical property inspection (building, pest), and your own modelling (cash flow projection). The protocol is a guide to where SafeBuy adds value and where it complements other professional inputs.

Running the 10-check protocol consistently turns property investment from a hope-driven exercise into a process-driven one. The investors who consistently outperform over 10-20 year horizons are not the ones with the best market timing. They are the ones who run the protocol every time, on every property, without exception.