Renovation return: what the spend does to rent, yield and payback.
For owners and landlords. Pick your suburb and the calculator starts from its real median weekly rent, then models a spend against a rent change — including the weeks of lost rent while the work is on, which is the line most people leave out. It shows the gross yield shift and the payback period, and it is honest about the two things it cannot tell you.
$622
median weekly rent across Auckland, from 16,641 bonds lodged in Q1 2026. Every one of the 246 suburbs in the calculator has its own median and its own bond count.
MBIE (Tenancy Services) rental bond data · Q1 2026
Photography commissioned — plate reserved · July 2026
The calculator
Model the return.
How it works
The arithmetic, and what it leaves out.
Simple enough to check on paper, which is the point. One published input, four of yours, and every line printed.
The method
- Weekly change = your expected rent after, minus the current rent.
- Annual change = weekly change × 52.
- Lost rent = current rent × the weeks the property is out of action.
- Total outlay = renovation spend + lost rent.
- Payback = total outlay ÷ annual rent change.
- Gross yield = annual rent ÷ your property value estimate, before and after. Note the yield after is calculated on the same value figure, not on value plus the spend, so it answers “what does this rent look like against what the property is worth”, not “what did my capital earn”.
Everything it leaves out, named
- Rates, insurance, body corporate levies, maintenance, property management fees.
- Income tax on the additional rent, and the distinction between deductible repairs and non-deductible capital improvements — which on a renovation is a live question worth asking an accountant about before you start, not after.
- Finance costs on the money spent, which on a long renovation are not trivial.
- Vacancy beyond the weeks you entered, and the risk that the rent you modelled is not achieved.
- Any change in what the property would sell for.
Read the bond count
The working prints how many bonds each suburb median is built from. A median from 12 bonds and a median from 400 are not the same quality of number, and the small ones move a lot quarter to quarter. Where the count is low, treat the median as an indication and look at the wider area too.
Questions people actually ask
Does renovating actually increase the rent?
Sometimes, and not by as much as the spend suggests. Rent is set by what comparable properties in that suburb are letting for, not by what you spent. A tired three-bedroom brought up to the standard of its neighbours can move to the local median; the same house given a premium kitchen usually cannot move past the top of its suburb, because the tenant paying that rent has other options. The honest framing is that renovation defends your position in the market more reliably than it lifts you out of it. This calculator will happily show you a rent increase you will not get, which is why it prints the assumption rather than hiding it.
Where does the median rent come from?
MBIE’s rental bond data, through Tenancy Services, for Q1 2026. It is built from bonds actually lodged, so it reflects new tenancies rather than the whole rented stock, and each suburb’s figure carries a bond count you can see in the working — a median from a handful of bonds is a much weaker number than one from a hundred. The source.
Does this tell me what the renovation adds to the property’s value?
No, and it deliberately does not try. Resale value is a separate question driven by the local sales market, the property’s land, the zone, comparable sales and the point in the cycle you sell at — none of which follows from a rent change. Anyone offering you a "renovation adds X% to value" figure is selling something. Ask a valuer who knows the street.
Why does the payback include weeks of lost rent?
Because it is real money and it is routinely left out. A bathroom or kitchen out of action usually means a vacant property, and six weeks of a $650 tenancy is nearly $4,000 that has to be recovered before the renovation has paid for anything. Including it is the difference between a payback figure and a marketing figure.
Can I raise the rent as soon as the work is finished?
Not necessarily. Under residential tenancy law a rent increase for an existing tenancy is limited to once every 12 months, and notice requirements apply. So the timing of an increase can be governed by when the last one was, not by when the tiles went in. Check the current rules with Tenancy Services before you plan around a date.
Is gross yield the right measure?
It is the simplest one, and this tool is explicit that it is gross. It ignores rates, insurance, maintenance, management fees, vacancy beyond the weeks you entered, tax and finance costs. Net yield is the number that matters to your bank account and it needs your actual figures. Use the gross change here as a direction of travel, not as a return.
Should I renovate or sell as-is?
That depends on numbers this tool does not have, and on what your zone contemplates for the land — in the higher-intensity zones a major renovation can lose to redevelopment before you start. What each Auckland zone contemplates is the first thing to check, and it is free.
Renovation budget
Build the spend figure from scope items and real trade pay rates before you model the return.
All 246 Auckland suburbs
Median rent, dwelling mix, zoning and overlay status for every suburb on this site.
What it costs
The published Auckland cost context, and the honest gap where no dataset exists.
Rent data. MBIE (Tenancy Services) rental bond data, Q1 2026. Medians are derived from bonds lodged and describe a suburb’s market, not a property. This calculator is a planning model, not financial advice and not a valuation. It does not answer what a renovation does to resale value, and it does not account for tax, outgoings or finance costs.