What it costs to buy a plumbing business in Australia

Australian plumbing businesses are listed from about $240,000 for a small owner-operator run to $1.2m plus for an established multi-van operation with 25 years of trading. Most maintenance businesses with 2 to 5 staff sell between $350,000 and $950,000. Brokers price the goodwill at 2 to 4 times adjusted net profit, and the buyer or a nominee employee must hold the state plumbing licence before the sale can settle.

A plumbing business is priced on the maintainable profit it throws off after the owner is paid a market wage, same as any trade business, but it carries one complication most trades do not: regulated plumbing work has to be signed off by a licensed plumber, so who is allowed to buy the business is narrower than who can afford it. A two-van residential service business, a strata and real estate agency maintenance book, and a commercial or new-build contracting outfit look nothing alike on paper even at the same turnover, because the mix of contract work versus one-off callouts drives both the margin and the multiple. This guide surveys what is listed right now across the main Australian business-for-sale marketplaces, the multiples brokers use, and how the licensing rule changes who can actually settle the purchase.

What plumbing businesses sell for

The table below is a survey of live and recently sold listings across SEEK Business, Bsale, Benchmark Business Sales and businessforsale.com.au in late September 2026. Where the broker has published turnover or profit we show it against the asking price; several listings, especially the higher-value ones, show profit only.

Two things stand out. First, the gap between a $240,000 owner-operator sale and a $1.2m established operation is almost entirely staff, vans and a contract book, not the trade itself. Second, several of the biggest listings (the two Sydney Bsale listings, the 30-year Perth practice) do not publish an asking price at all, only turnover or profit, because at that size the broker qualifies buyers before quoting a number. That is normal for trade businesses over $500,000 of profit.

Maintenance plumbing: strata, real estate and the property manager pipeline

A maintenance-heavy plumbing business, one whose work comes from owners corporations, real estate property managers and repeat residential clients rather than one-off callouts, sells on a different logic to a general service plumber. Recurring, low-cost-of-acquisition work from agencies and strata managers is the most defensive revenue a plumbing business can show a buyer, because it does not depend on advertising spend or the owner's own relationships to keep flowing.

Both of these are marked as recently sold, which is itself useful data: a business with a genuine agency and strata pipeline does not sit on the market. The Benchmark listing's 70 per cent plus ROI claim only holds because the referral cost is near zero, real estate managers and body corporates re-book the same trusted plumber rather than re-tendering every job. When you are assessing a listing like this, ask for the split between owners corporation contracts, individual real estate agency agreements and organic repeat clients, and how many separate agencies the business relies on. A book concentrated in one or two large agencies is a single point of failure if that relationship changes hands.

Commercial, new-build and franchise plumbing

Commercial and new-build plumbing contractors work to builder and project schedules rather than a residential callout diary, which changes the buyer profile: the business is often priced on backlog and repeat panel or preferred-contractor status with builders, not just trailing profit. These businesses are advertised less often than residential service plumbers because they tend to sell through direct approach or industry brokers rather than public listings, but the residential-facing listings above show the split clearly, several explicitly separate residential, commercial and service or repair revenue (Korumburra, VIC) or lead with commercial contract income (Brisbane, QLD, approved vendor status).

Franchise plumbing is a separate path into ownership. SEEK Business lists plumbing franchise and franchise resale opportunities from about $159,000 to $350,000, priced on the territory and existing customer base rather than a trading history. Jim's Plumbing, the largest plumbing franchise group in Australia, requires every franchise owner to hold both an Australian plumbing licence and a gas fitting licence themselves, so franchise ownership here is a path for a working plumber wanting brand, leads and back office, not a passive investor.

How the price is set: net profit multiple, not turnover

Sellers quote turnover because it is the bigger number. Buyers, brokers and lenders price off adjusted net profit, turnover after every cost including a market wage for the owner if they work in the business. Miro Capital's plumbing valuation guide, published 27 March 2026, sets out the ranges brokers are actually using.

Miro also cites ATO 2023-24 small business benchmark data on net margins by turnover band: businesses turning over $50,000 to $150,000 run a net margin of 34 to 50 per cent, $150,000 to $600,000 runs 26 to 41 per cent, and businesses over $600,000 run 14 to 25 per cent, margin compresses as the business adds staff and overhead to carry more work. Use that band to sanity check any listing that shows turnover but not profit. A $950,000 turnover business (Korumburra) at a 20 per cent net margin is throwing off roughly $190,000, which on a 3 to 5x multiple supports an asking price somewhere in the $570,000 to $950,000 range, in the ballpark of what it is listed for.

The licence question: who is actually allowed to buy

This is the item that makes a plumbing business different from most other trade acquisitions. Regulated plumbing and drainage work in every Australian state has to be carried out or supervised by someone holding the relevant occupational plumbing licence, and a company operating a plumbing business needs a licensed nominee. In Queensland, the Queensland Building and Construction Commission requires a company plumbing licence to have a nominee, an individual licensee who is an employee, secretary or director of the company and holds an occupational plumber and drainer licence covering the work being contracted. If the nominee is not already licensed, the individual application goes in alongside the company licence application. Other states run equivalent schemes through their own regulator (NSW Fair Trading, the Victorian Building Authority, the WA Plumbers Licensing Board, and the equivalent bodies in SA, Tasmania, the ACT and the NT), the detail differs but the principle does not: an unlicensed buyer cannot legally trade the business alone.

In practice this narrows the buyer pool three ways. A licensed plumber buying solo can settle and start work immediately. An unlicensed buyer, an investor, a business partner supplying capital, or a plumber wanting to expand into a second state where they are not personally licensed, needs to employ or appoint a licensed nominee before the licence transfers, and many vendors will only sell if the buyer already has that person lined up. Some sellers stay on for a transition period specifically to hold the licence while the new owner arranges their own, check whether that is offered and for how long before you make an offer. Franchise buyers sidestep the problem differently: Jim's Plumbing requires the franchisee to be the licensed plumber, so the licence question is answered by the franchise model itself rather than left to the buyer to solve.

What you pay on top of the price

The advertised price is rarely the full cheque. Budget for these as well, and expect a lender to ask you to show it.

• Vehicles and equipment. Most listings price goodwill separately from vans, tools and diagnostic gear (CCTV drain cameras, locators, pipe freezing kits). A fitted-out plumbing van typically costs $60,000 to $80,000 to replace new, so a 2 to 4 van fleet is a material line item even at 5 to 8 years old.
• Stock at valuation. Consumables, fittings and parts on the truck and in the workshop, commonly listed as plus SAV, as in several of the Perth listings above.
• Licence and compliance transfer costs. Nominee licence applications, gas fitting authorisation, and any state-specific induction or insurance the new entity needs before it can legally trade.
• Working capital. Commercial and new-build contract work can run 30 to 60 day payment terms even though the materials and labour go out immediately, budget cash or an overdraft to cover the gap, especially on a business weighted toward builder or agency contracts rather than paid-on-completion residential callouts.
• Legal, accounting and due diligence. $8,000 to $20,000 for contract review, financial verification against BAS lodgements and, on anything over $500,000, an independent valuation if the lender asks for one.

On due diligence, reconcile advertised turnover and profit against BAS and tax returns for the last three years, and get a written list of every recurring contract (strata, real estate agency, builder panel) with start date and whether it transfers automatically or needs to be re-signed with the new owner. A book that looks recurring on paper but is really a handshake with one property manager is a different asset to a signed panel agreement.

Financing a plumbing business purchase

Plumbing businesses do not get the 100 per cent practice loans written for medical and dental practices, lenders assess them as a standard trade business acquisition. Expect to fund the goodwill component at 60 to 80 per cent of a supported valuation, with the balance from savings, a vendor loan, or equity in an existing property. The vehicles and equipment being taken over, or replaced at settlement, are usually financed separately on a chattel mortgage or equipment loan secured on the gear itself rather than folded into the goodwill loan, this keeps the rate lower on the asset-backed portion and avoids stretching the deal's overall serviceability. If you are also buying property the business operates from, that is funded separately again through commercial property finance, so the acquisition loan covers goodwill only.

Read our guide to buying a trades business for how lenders assess owner-dependency and contract quality across trades generally, and our guide to tradie equipment and vehicle finance if you need to fund new vans or tools alongside the purchase, or an ABN car finance facility for a single replacement vehicle. To get a number from Ventas, send the asking price, three years of financials, staff count and whether they are employed or subcontracted, the split between contract and one-off work, the licence status of the buying entity, and whether property is part of the deal. Start at business acquisition finance. Finance is subject to lender assessment.

This is general information only and not financial, credit, or tax advice. Figures are indicative market data from the sources listed, not Ventas offers, and move with the market. Consider your own circumstances and speak to a professional. All finance is subject to lender assessment and approval.

This article is general information only and not financial, credit, or tax advice. Ventas Asset Lending is a finance broker, not a lender. Approvals are subject to lender assessment. Consider your own circumstances and speak to a qualified professional, including your accountant for any tax questions.