How many Australian architect or building designers are in this dataset?

422, drawn from 569,128 scanned records and measured on 2026-10-03. That is a census of the architect or building designers in this directory rather than of every architect or building designer in Australia, and it skews toward businesses with enough of a public footprint to be found at all.

How many Australian architect or building designers publish an ABN you can check?

38.6% — 163 of 422. The national rate across all trades is 21.5%, so architect or building designers sit 80% above it. An ABN is free and public, so a missing one is usually a business that never put it on their website rather than a business without one.

How many architect or building designers list a phone number that doesn't match their website?

4.3% of the 69 we compared, or about 3 businesses. This counts only cases where a listed number directly contradicts the number on the business's own site — not businesses with no phone number and not ones the comparison has not run for. It is often a stale listing, and sometimes a lead-reselling service sitting between you and the person who does the work.

How many Google reviews does the median Australian architect or building designer have?

15, against a national median of 39 across all trades. Half have fewer. Review counts track how often people hire a trade rather than how well it performs, so comparing a architect or building designer against a trade people call more often tells you very little.

Which state has the best-documented architect or building designers?

New South Wales leads on published ABNs at 45.8%, against 35.2% in Victoria. Only states with at least 40 businesses are compared, because percentages taken over a handful of businesses move too far on a single record to mean anything.

Research

Australian architect or building designers, by the numbers

We checked what 422 Australian architect or building designers publish about themselves, and how much of it holds up against an independent source.

Measured 2026-10-03 · free to reuse with attribution

38.6%

publish a checkable ABN

of all 422. 80% above the national rate of 21.5%.

46.4%

phone number confirmed against their own site

of 69 compared. 22% below the national rate of 59.2%.

4.3%

phone number contradicting their own site

of 69 compared. 44% below the national rate of 7.7%.

89.7%

have a website that loads

of 78 fetched. 11% above the national rate of 81%.

Google reviews for the median business

The national median is 39. Review counts track how often people hire a trade, not how well they do it — a trade you call once a decade will always sit lower.

What stands out

Architects & Building Designers publish a checkable ABN at 38.6%, 80% above the 21.5% national rate — better than most trades, though still under one business in six.

3 architect or building designers — 4.3% of the 69 we compared — list a phone number that contradicts the one on their own website, 44% below the national 7.7%. That is better than the national picture, which is a reasonable sign the trade keeps its listings current.

The median has 15 Google reviews against 39 nationally. That gap says more about how often households need architect or building designers than about the standard of the work, which is why the ranking on this site weights review volume on a log scale rather than treating a 5.0 from four reviews as equal to a 4.6 from three hundred.

Architects & Building Designers by state

States with at least 40 architect or building designers in the directory. Smaller groups are held back rather than published as percentages that move too far on a single record.

Verification coverage for Australian architect or building designers, by state
State	Businesses	ABN	Phones checked	Phone confirmed	Phone mismatch	Sites checked	Site loads	Median reviews
Victoria	159	35.2%	24	—	—	27	—	15
New South Wales	142	45.8%	15	—	—	17	—	16
Queensland	60	40%	15	—	—	17	—	13

Method, and what it can't tell you

422 Australian architect or building designers. Every one of them gets the same four checks: an ABN lookup against the national register, a comparison of the listed phone number against the number on the business's own website, an HTTP request to that website, and a match against open mapping data maintained separately from Google.

Not all four have run everywhere yet, so the figures above are shares of what has been checked: 69 phone comparisons, 78 website fetches and 83 cross-source matches out of 422 businesses. A check that has not run counts in neither half of a percentage.

This is a census of a directory, not of the trade. It covers businesses with enough of a public footprint to be found at all, which if anything biases these figures upward — a business too small to appear here is less likely to publish an ABN, not more.

ABN registration is the one figure taken over every business in the group rather than over a checked subset, because an absent ABN is not a failed lookup — read it as a floor. Review counts and averages are held; individual reviews are not, so nothing here can tell you whether a business's reviews arrived steadily or all at once.

Full method and national figures: the state of Australian trade business data.

Common questions

How many Australian architect or building designers are in this dataset?: 422, drawn from 569,128 scanned records and measured on 2026-10-03. That is a census of the architect or building designers in this directory rather than of every architect or building designer in Australia, and it skews toward businesses with enough of a public footprint to be found at all.
How many Australian architect or building designers publish an ABN you can check?: 38.6% — 163 of 422. The national rate across all trades is 21.5%, so architect or building designers sit 80% above it. An ABN is free and public, so a missing one is usually a business that never put it on their website rather than a business without one.
How many architect or building designers list a phone number that doesn't match their website?: 4.3% of the 69 we compared, or about 3 businesses. This counts only cases where a listed number directly contradicts the number on the business's own site — not businesses with no phone number and not ones the comparison has not run for. It is often a stale listing, and sometimes a lead-reselling service sitting between you and the person who does the work.
How many Google reviews does the median Australian architect or building designer have?: 15, against a national median of 39 across all trades. Half have fewer. Review counts track how often people hire a trade rather than how well it performs, so comparing a architect or building designer against a trade people call more often tells you very little.
Which state has the best-documented architect or building designers?: New South Wales leads on published ABNs at 45.8%, against 35.2% in Victoria. Only states with at least 40 businesses are compared, because percentages taken over a handful of businesses move too far on a single record to mean anything.

Using these numbers

Free to quote, chart or republish under CC BY 4.0, which asks only for attribution and a link. The full aggregate dataset is available as a free download. If you need a cut that isn't published, ask.

WhoToHire, “Australian architect or building designer data 2026”, 2026-10-03. https://whotohire.com.au/research/trades/architects

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