When we sorted the reviews held for ranked building firms into what wins five stars and what draws one, the two lists were not opposites of each other. Praise is mostly about the finished work. Complaints are mostly about everything the builder did, or stopped doing, around it.
"Once they had the final payment, the emails stopped. Nineteen months on, most of the defects we listed are still there."
What earns the five stars
Quality of the finished work is the thing satisfied customers name most, in more than half of all five-star reviews. It is closely followed by communication: being kept informed, getting a reply, having a change explained before it happened.
Share of 200 five-star reviews mentioning each theme. A review often mentions more than one, so the figures do not sum to 100%.
Craft is the baseline a good builder is expected to clear, and the happy ones clear it. Reviewers describe finishes that met or beat what they pictured, and use the word pride often.
Nearly half of the best reviews single out communication. Customers praise the builder who explained a delay before being asked, who walked a first-time client through consents, who returned a call the same day. On a job that runs for months and moves large sums, a reply is worth a great deal.
Being on time earns its own mention in a quarter of reviews, singled out as rare enough to be worth remarking on. Praise for pricing is rarely about being cheap. What gets praised is a final invoice that matched the quote, a number that held.
What costs the stars
The low reviews tell a harder story, and they are longer. Defective work that the builder then would not put right is the most common single complaint, in over a third of them.
Share of 168 reviews rating two stars or below mentioning each theme. Themes overlap: an angry review often cites several.
How a builder behaves once a customer pushes back is the second most common complaint, cited in nearly a third of low reviews. Reviewers describe being talked over, dismissed, and in a number of cases threatened or abused when they raised a fault. Abusive conduct appears almost as often as defective work itself, and far more often than the vanished deposit, which turns up in about one low review in sixteen.
Going quiet after handover is close behind, in three of every ten low reviews. The pattern is consistent: responsive and warm through the sale and the build, then unreachable once the final payment clears and a defect needs fixing. "Impossible to get a reply once they had been paid" is the shape of it.
Surprise costs and a breached fixed price appear in about one low review in seven, oversold sales promises in one in eight. Neither comes close to the two themes above.
The same trade, a different rating
Communication is the one theme that ranks near the top of both lists: praised by half of happy customers, and, counting the builders who went silent, raised by three in ten unhappy ones.
| Theme | In five-star reviews | In low reviews |
|---|---|---|
| Communication | 49% | 30% |
| The building work itself | 57% | 36% |
| Kept to the schedule | 27% | 20% |
| Pricing held / surprised | 18% | 14% |
Communication in low reviews counts reviews describing a builder who stopped responding. Themes overlap, so a review can count toward several.
Before signing a build contract, read a firm's reviews for what happened when a defect was raised and whether anyone replied after handover, because that is where the ratings part. Nearly every firm can show off finished work, and a back catalogue of photos says little that those reviews do not say better.
Where the complaints cluster
Complaint rates are not spread evenly across the country. Counting one-star reviews as a share of all reviews held, the rate runs more than seven times higher in the hardest market than in the easiest.
| Market | 1-star rate | Most common local complaint |
|---|---|---|
| South Auckland | 9.1% | Defective work, fix refused |
| Hamilton | 8.4% | Went silent after handover |
| West Auckland | 8.3% | Defective work, fix refused |
| Christchurch | 6.3% | Abusive or intimidating conduct |
| Auckland | 5.1% | Defective work / conduct (tied) |
| Dunedin | 4.5% | Abusive or intimidating conduct |
| Napier and Hastings | 3.1% | Defective work, fix refused |
| Wellington | 2.6% | Abusive or intimidating conduct |
| North Shore | 1.5% | Delays, blown timelines |
| Tauranga | 1.3% | Hidden or surprise costs |
One-star reviews as a share of all reviews held for ranked builders in each market. A business is counted in the market where it ranks highest.
The three highest-complaint markets are all in the upper North Island, led by South Auckland, Hamilton and West Auckland. The lowest are Tauranga and Auckland's North Shore. Conduct is the leading local complaint in four of the ten markets, a further sign that it is a category-wide pattern.
This analysis leans recent and strongly positive: about nine in ten reviews held rate four or five stars, so what it describes is the experience of customers of New Zealand's better-rated builders. The complaint themes are drawn from 168 reviews rating two stars or below, enough to rank what recurs but small enough that each percentage carries a few points of sampling noise, and the per-city complaint counts are smaller still. Themes were assigned by whether a review mentions them, so one review can count toward several.
Methodology: Top5.nz analysed 2,911 Google reviews held for ranked building firms across ten New Zealand markets, collected through mid-2026. Every review rating two stars or below was classified, alongside a sample of 200 five-star reviews, against a fixed taxonomy of eight complaint and eight praise themes using AI-assisted analysis. Tagging is multi-label, so a review may carry several themes or none. Per-city complaint rates use all reviews held for the builders ranked in each market, with each business counted in the market where it ranks highest. A manual review of a stratified 50-review sample agreed with the automated tags on 82% of reviews for the exact set of themes, and on 95% of individual theme assignments. No business is named. Full ranking methodology: How we rank.