How long should I allow for due diligence?

Typically 10 to 15 working days is reasonable for a standard property. Allow longer for complex properties, body corporates, or if you need specialist reports. Discuss timeframes with your lawyer before making an offer.

What if due diligence reveals problems?

You have options: negotiate a price reduction, request the seller fix issues before settlement, or walk away if you have appropriate conditions in your agreement. Your lawyer can advise on your options based on the contract terms.

Do I need a building inspection for a new build?

Yes, even new builds can have defects. A pre-purchase inspection can identify issues before the builder's warranty period expires. It also establishes a baseline condition for any future claims.

How much should I budget for due diligence?

Budget $1,500 to $3,000 for a typical property, covering LIM report ($250 to $400), building inspection ($400 to $800), and potentially specialist reports. It is a small price compared to the cost of buying a problem property.

Investment Property Due Diligence Checklist NZ

Due diligence is the process of thoroughly investigating a property before you commit to buying it. For investment properties, this goes beyond checking the physical condition; you need to verify that the numbers stack up and that there are no hidden issues that could affect your returns or resale value.

Why Due Diligence Matters

An investment property is a significant financial commitment. Unlike buying a home where emotional factors play a role, investment decisions should be based on facts and figures. Proper due diligence helps you:

Identify problems before they become your problems
Negotiate a fair price based on the property's true condition
Budget accurately for repairs and compliance costs
Avoid properties with issues that could affect financing or insurance
Make informed decisions rather than hopeful guesses

Document Checks

Essential Documents:

☐ LIM Report: Land Information Memorandum from the local council
☐ Title Search: Check ownership, easements, covenants, and encumbrances
☐ Building Consent Records: Verify all work was consented and signed off
☐ Code Compliance Certificates: For any building work
☐ Resource Consent Records: If applicable to the property
☐ Body Corporate Records: For units, including minutes, accounts, and long-term maintenance plan
☐ Current Tenancy Agreement: If the property is tenanted
☐ Rent Payment History: Verify rental income claims

Understanding the LIM Report

The LIM (Land Information Memorandum) is one of the most important documents you will obtain. It contains information the council holds about the property, including:

Building and resource consent history
Any known hazards (flooding, erosion, contamination)
Rates information and any outstanding charges
Zoning and district plan rules
Any notices or requisitions affecting the property

LIMs cost between $250 and $400 and typically take 10 working days to process. Some councils offer urgent processing for an additional fee.

Physical Inspections

Inspection Checklist:

☐ Building Inspection: Comprehensive report from a qualified inspector
☐ Roof Inspection: Condition, remaining life, any repairs needed
☐ Subfloor Inspection: Moisture, piles, insulation
☐ Electrical Check: Wiring condition, switchboard, safety switches
☐ Plumbing Check: Pipes, water pressure, drainage
☐ Weathertightness Assessment: Especially for 1990s to 2000s builds
☐ Methamphetamine Test: Consider for properties with unknown history
☐ Asbestos Assessment: For pre-1990s properties

Building Inspection Deep Dive

A professional building inspection typically costs $400 to $800 depending on the property size and location. It is worth every cent. Look for an inspector who:

Is a member of a professional body (NZIBS, BOINZ)
Has professional indemnity insurance
Provides detailed written reports with photos
Will explain their findings to you

Pay attention to major issues like structural problems, weathertightness, and deferred maintenance that could cost tens of thousands to fix. Minor cosmetic issues are often acceptable and can even provide negotiating leverage.

Healthy Homes Compliance

All rental properties must meet Healthy Homes standards. Check the property against each requirement:

Healthy Homes Checklist:

☐ Heating: Fixed heater in main living area meeting capacity requirements
☐ Insulation: Ceiling R 2.9 (or R 1.9 existing) and underfloor R 1.3
☐ Ventilation: Extractor fans in kitchen, bathroom, and rooms with cooktops
☐ Moisture and Drainage: Efficient drainage, no recurring moisture problems
☐ Draught Stopping: Reasonable attempts to block draughts

If the property does not meet these standards, get quotes for the required work. This can range from a few hundred dollars for draught stopping to several thousand for heating and insulation upgrades.

Financial Due Diligence

Financial Checks:

☐ Rental Appraisal: Get independent estimates from 2-3 property managers
☐ Comparable Sales: Research recent sales of similar properties
☐ Rates: Verify current rates and any planned increases
☐ Insurance: Get quotes for landlord insurance
☐ Body Corporate Fees: Current fees and any planned increases
☐ Yield Calculation: Calculate gross and net rental yield
☐ Cash Flow Analysis: Will it be positively or negatively geared?

Do not rely solely on the agent's rental estimate or the current rent if the property is tenanted. Current rents may be below market, or the agent may be optimistic. Independent rental appraisals give you a more accurate picture.

Related: How to Calculate Rental Yield

Location and Market Research

Area Research:

☐ Vacancy Rates: Check rental vacancy rates for the area
☐ Tenant Demand: What type of tenants are looking in this area?
☐ Future Development: Check district plan for zoning changes or developments
☐ Infrastructure: Planned roads, public transport, or amenities
☐ Employment: Local employment opportunities and trends
☐ Schools: Quality of local schools (affects family tenant demand)
☐ Crime Statistics: Check NZ Police crime maps
☐ Flood Maps: Check council flood hazard maps

Visit the property at different times of day and week. A quiet street during a weekday viewing might be a nightmare on Friday nights. Talk to neighbours if possible; they often know things that will not show up in any report.

Related: Finding High-Growth Suburbs

Insurance Considerations

Before going unconditional, confirm you can get appropriate insurance. Some properties are difficult or expensive to insure due to:

Flood or erosion risk
Earthquake-prone building status
Construction type (e.g., monolithic cladding)
Claims history
Location (e.g., Wellington earthquake risk)

Get insurance quotes before your due diligence period ends. If insurance is unavailable or prohibitively expensive, this should factor into your decision.

Existing Tenancy Checks

If the property has existing tenants, additional due diligence is required:

Tenancy Checks:

☐ Review current tenancy agreement terms
☐ Verify rent amount and payment history
☐ Check bond lodgement with Tenancy Services
☐ Review recent property inspection reports
☐ Understand any verbal agreements or arrangements
☐ Confirm the Healthy Homes compliance statement has been provided

Remember that existing tenancies transfer to you on settlement. You inherit the tenants, the rent amount, and any issues. If the current rent is below market, check when and how you can review it.

Red Flags to Watch For

Warning Signs:

Unconsented building work
Monolithic cladding (1990s to early 2000s builds)
Signs of water damage or mould
Structural cracks or movement
Properties sold "as is where is"
Reluctance to allow inspections
Significant body corporate issues or upcoming levies
High tenant turnover or current vacancy
Nearby developments that could affect value or rental demand

Making Your Decision

After completing your due diligence, you should have a clear picture of:

The property's condition and any required repairs
Realistic rental income expectations
Ongoing costs including rates, insurance, and maintenance
Any compliance work needed
Potential risks and how to mitigate them

Use this information to decide whether to proceed, renegotiate the price, or walk away. The best investors are willing to walk away from deals that do not stack up, no matter how much time they have invested in due diligence.