Guide · AI for construction
A NZ construction or trades firm can hand AI the paperwork that moves between people and systems: subcontractor agreements, the accounts inbox, payment claims, site reports into billing and project files, with a person approving anything that carries money, legal weight or safety. I build this at Ez-AI: for one NZ property developer, each subcontractor agreement went from about an hour to two minutes, giving back 15 to 20 hours a month. As of October 2026 most of this work costs NZ$500 to $8,000 as a fixed price.
Hand AI the paperwork that moves between people and systems, and keep the decisions that carry money, legal weight or safety with a named person. In a 20-person construction or trades business that usually means subcontractor agreements, the accounts inbox, payment claims, reports and certificates into billing, and finding the right document in the project files.
As for who can help: switch on what your job and accounting software already does first, because that's cheaper than any build. The work between the systems is where most construction admin lives, and that's what I build at Ez-AI.
Most of the hours go on reading, retyping, chasing and filing, and that's the part AI can take. The judgement calls stay with your people.
| Where it piles up | What AI can take | What stays with a person |
|---|---|---|
| Subcontractor agreements | Build each one from the job line and your template, send it for e-signature, chase it, file it. | Approving each agreement and any change to terms. |
| The accounts inbox | Sort invoices, statements, claims, reminders and receipts, match each to supplier and project, file it. | Anything disputed or unusual. |
| Payment claims, in and out | Spot claims, log their arrival, calculate the deadline, remind the right person, check outgoing claims. | The assessment, the scheduled amount, the sign-off. |
| Reports and certificates into billing | Read long PDFs, images included, and write quantities into the right simPRO job or Xero draft. | Raising the invoice and billing queries. |
| Project and tender files | Answer staff questions from your files, each person seeing only what they can already open. | Anything quoted in a tender or sent to a client. |
Six builds from the public build record sit in or next to construction and trades: five in production and one in client testing.
| Build | What it does | Result or status |
|---|---|---|
| EZ-PRP-10, property developer | Subcontractor agreements generated from the developer's template, e-signed through DocuSign, chased and filed. The accounts inbox sorted and payment claims routed. | An hour to two minutes per agreement, 15 to 20 hours a month back, zero misfiled across the October audits. Case study. |
| EZ-HAZ-04, hazard consultancy | Asbestos clearance reports read with AI vision and the billing quantities written into the matching simPRO job. | Hours to minutes per report. The first live batch caught billing errors in 3 of 23 reports. Case study. |
| EZ-ELE-15, electrical contractor, Auckland | Three mailboxes read by a connector, and each new project turned into a job folder and document pack from one intake. | In production, after staff training that took a team with mixed AI confidence to daily use. |
| EZ-HVC-05, air-conditioning company | A scheduling app for the field team, a CRM behind it, and monthly billing packs across four Xero organisations. | Month-end billing from days to under an hour to check the packs. Case study. |
| EZ-SAF-13, safety consultancy, Rotorua | A hands-free desktop voice assistant for the field team: dictation into any window, email read out and sent by voice with a read-back check. | In production. |
| EZ-CON-16, construction group, Auckland | A company brain over SharePoint project and tender files, permission-aware, in the client's own Azure tenant, read-only by design. | In client testing, not yet live. |
Both full case studies show the pattern that matters more than the technology: the client's own templates and rules kept, a dry run or proof run before anything touched a live system, and the approve step left with the office.
Under the Construction Contracts Act 2002, a payment claim you don't answer with a payment schedule in time can leave you liable for the full claimed amount, so automation here should log, calculate and alert, never decide. The rules worth knowing, from the Act itself:
That's why a claim buried in a statement thread is a real risk. In the developer's inbox, claims are one of five message types sorted automatically, and only those needing a decision reach the finance lead. I'd add the arrival date, the deadline in the Act's working days, and a reminder to the quantity surveyor or project manager. This is not legal advice; check with your lawyer.
AI can keep health and safety paperwork complete and findable, but under the Health and Safety at Work Act 2015 the duty stays with the PCBU and can't be handed to software or anyone else.
Section 31 of the Act says a duty may not be transferred to another person. Businesses with a duty on the same matter, such as a shared site, must so far as is reasonably practicable consult, co-operate and co-ordinate with each other (section 34), and notifiable events must be recorded and kept for at least five years (section 57). That paperwork is where AI helps.
Whether something is notifiable, and the call to WorkSafe, stays with a named person. Changes passed on 1 July 2026 take effect on 1 April 2027, giving businesses with fewer than 20 workers for at least nine months of a financial year proportionate duties focused on critical risks. A 20-person firm sits right on that line, so check which side you fall. Not legal advice; check with your lawyer.
Most construction admin automation is NZ$500 to $8,000 as a fixed price, excluding GST, as of October 2026. These are the pricing page ranges the work falls into.
| The job | Fixed price, as of October 2026 |
|---|---|
| Agreements, e-signature and filing across your tools | NZ$500 to $5,000 |
| Reading invoices, claims and reports into simPRO, Xero or your files | NZ$1,000 to $8,000 |
| A company brain over project and tender files | NZ$3,000 to $12,000 |
| A custom job, scheduling and billing system | NZ$4,000 to $15,000 |
| Hosting, monitoring and support | From NZ$99 a month |
AI usage is billed at cost, usually a few dollars to a few tens of dollars a month for a small business. A typical build takes 4 to 6 weeks, with training, written documentation and a test mode before go-live, and nothing is billed until a fixed price is agreed. More in what a fixed-price AI project includes, and in the simPRO and Xero guides.
To start, pick the one admin job you can put hours against, gather twenty or so real examples, awkward ones included, and name the person who owns the process.
Start with what your job and accounting software already does. The work between systems, like agreements, the accounts inbox, payment claims and reports into billing, usually needs an automation builder. Ez-AI is a founder-led NZ consultancy, rated 5.0 on Google, with live builds for a property developer, a hazard consultancy, an electrical contractor and an air-conditioning company. Whoever you talk to, ask for a construction example, where the system runs, and who approves what.
It can do the clerical part: spot the claim, log when it arrived, work out the payment schedule deadline and remind the person responsible. The assessment and scheduled amount stay with a person. Unless your contract says otherwise, a schedule is due 20 working days after the claim is served, and those working days skip 24 December to 5 January. This is not legal advice; check with your lawyer.
No. Under the Health and Safety at Work Act 2015 a duty can't be transferred to another person. AI can collect, check and file the paperwork and keep notifiable event records findable for the five years the Act requires, but risk decisions and notifying WorkSafe stay with your people. Changes to the Act take effect on 1 April 2027.
Yes, those are the systems my construction and trades builds already work with: simPRO jobs, four Xero organisations, DocuSign agreements, and SharePoint files for a company brain that is in client testing. What's possible depends on the access your accounts allow, so the first hours of a build prove the connection.
As of October 2026, automation across your tools is NZ$500 to $5,000, reading invoices, claims and reports NZ$1,000 to $8,000, and a company brain over your project files NZ$3,000 to $12,000. Hosting and support start at NZ$99 a month and AI usage is billed at cost. Prices exclude GST and discovery is free.
Walk me through one job from tender to final payment on a free 30-minute call. I'll tell you which admin is worth automating and what it would cost as a fixed price. Discovery is always free.
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