Online Property Valuation vs
Real Estate Agent Appraisal
homes.co.nz says your home is worth $980,000. Your agent says $1,150,000. QV says $870,000. Which one should you believe — and which one should you use to sell?
Quick Comparison
| Method | Cost | Typical Accuracy | Best Used For |
|---|---|---|---|
| Online estimate (homes.co.nz, OneRoof, QV eValuer) | Free | ±15–25% | Curiosity, tracking trends |
| Agent appraisal (real estate agent, free) | Free | ±5–10% | Selling, pricing strategy |
| Registered valuation (PINZ-registered valuer) | $800–$1,500 | ±2–5% | Bank finance, legal, estate |
| RV / CV (council rates valuation) | Free | ±20–50% | Rates calculation only |
What is an Online Property Valuation?
Online property valuations use Automated Valuation Models (AVMs) — algorithms that analyse recent sales data, property characteristics, and market trends to generate an estimated price for your home. They're free, instant, and widely used — but have significant limitations.
Main NZ Online Valuation Tools
Homes Estimate — uses recent sales, property attributes, and suburb trends. Updates frequently. Good for general tracking.
OneRoof Estimate — backed by CoreLogic data. Shows recent sold prices and estimate with confidence interval.
QV's online tool separate from your official RV. More data than basic tools but still algorithm-based.
Industry-standard property data used by banks and professionals. Limited free access for consumers.
Why Online Tools Miss the Mark
No algorithm has inspected your kitchen renovation, your sun-soaked deck, or the fact your roof needs replacing. These details — worth tens of thousands — are invisible to online tools.
In thinly-traded suburbs with few recent sales, the algorithm has little to work with. Estimates in unique or low-turnover areas are especially unreliable.
An algorithm doesn't know that one side of your street has motorway noise, or that the park behind you floods in winter. Local agents know these factors intimately.
Online tools can lag behind rapidly changing markets. In fast-moving conditions, estimates may be based on sales that no longer reflect current buyer behaviour.
What is a Real Estate Agent Appraisal?
A real estate agent appraisal (also called a comparative market analysis or CMA) is a written assessment of your property's current market value, prepared by a licensed real estate agent after physically inspecting your home. It is free and carries no obligation to sell with that agent.
What the agent looks at:
- Your property's land size, zoning, and development potential
- Dwelling size, number of bedrooms/bathrooms, garaging
- Condition — roof, cladding, chattels, kitchen and bathrooms
- Sun, views, aspect, and street position
- Recent consented improvements and their quality
- School zone proximity and transport access
- Comparable properties sold in the last 3–6 months nearby
- Current listings competing against your property
Agent appraisal vs online estimate
How long does it take?
An agent appraisal typically takes 30–60 minutes for the property inspection, then the agent prepares a written market appraisal within 24–48 hours. Most online services are instant.
What is a Registered Valuation?
A registered valuation is a formal written report prepared by a valuer who is a member of the Property Institute of New Zealand (PINZ). It is the most accurate single-property assessment available and is legally recognised for financial and legal purposes.
When you need a registered valuation:
- Applying for a mortgage or re-financing with a bank
- Buying a property where the bank requires independent confirmation of value
- Settling a deceased estate
- Matrimonial property or relationship property disputes
- Insurance replacement value assessments
- Commercial or development finance applications
Registered valuation facts:
Note: You do NOT need a registered valuation to sell your home. A free agent appraisal is entirely sufficient for pricing and selling. Save the $800–$1,500 unless specifically required by a bank or for legal purposes.
Which Should You Use?
Just curious about your property's value
homes.co.nz or OneRoof gives a quick ballpark for free. Good for casual tracking — don't make financial decisions based on it.
Thinking about selling your property
Get 2–3 free agent appraisals. Compare their reasoning, not just the price. This is free, accurate, and gives you a proper pricing strategy.
Need a bank valuation or legal assessment
Hire a PINZ-registered valuer. Required for bank finance, estate settlements, and legal disputes. Budget $800–$1,500.
Frequently Asked Questions
How accurate is the homes.co.nz estimate?
homes.co.nz estimates are typically accurate within ±15–25% of actual sale price. They're useful for tracking market trends but not reliable for setting an asking price. The algorithm struggles with unique properties, recent renovations, and rapidly changing local markets.
What is the difference between an online valuation and an agent appraisal?
An online valuation is generated by an algorithm using historical sales data — no one inspects your property. A real estate agent appraisal involves a qualified agent physically visiting your home, assessing its condition and features, and comparing it to very recent local sales. Agent appraisals are significantly more accurate (±5–10%) and are completely free.
Do I need a registered valuation to sell my house?
No. You do not need a registered valuation to sell your property. A free agent appraisal is sufficient for pricing and marketing. You only need a registered valuation for bank mortgage applications, legal disputes, or estate settlements.
How much does a registered valuation cost in NZ?
A registered valuation costs between $800 and $1,500 for a standard residential property. Turnaround is typically 3–7 business days. Rural and complex properties cost more.
Is the QV estimate the same as my RV?
No. Your RV (Rateable Value) is QV's official government assessment done every 3 years for your council for rates purposes. The QV eValuer online tool is a separate automated estimate updated more frequently. Both are different from current market value.
Skip the guesswork — get a free agent appraisal
Don't rely on an algorithm. Get an accurate, free appraisal from a local Auckland expert who knows your suburb. No obligation, results within 24 hours.
- More accurate than any online tool
- Based on real, recent sales in your suburb
- Completely free — no obligation to sell
- Expert who knows your local market