You've spent the better part of two or three decades building a business that actually works. Your team is certified, your maintenance contracts renew reliably, and your name carries weight in the industry. Now you're starting to think about what comes next — and you're not sure where to begin.
Selling a heating business in New Zealand isn't something most owners do more than once. The process is opaque, the buyer market isn't well understood, and the stakes are personal. This article is written for owners in that position: experienced, careful, and not yet sure they're ready to talk to a broker.
Why Heating and Mechanical Services Businesses Are Attractive to Buyers Right Now
New Zealand's commercial and industrial heating sector sits at an unusual intersection of regulatory obligation and physical reality — and that combination makes it genuinely attractive to buyers who understand it.
Start with the buildings. Auckland's CBD and the wider commercial building stock across Wellington and Hamilton contain a significant proportion of structures built between the 1970s and 1990s. These buildings are aging into their most maintenance-intensive phase. Boilers, heat exchangers, burner systems, and HVAC plant installed during that era require ongoing servicing, compliance work, and eventual replacement. The pipeline of demand isn't speculative — it's structural.
Overlaid on that is New Zealand's Building Warrant of Fitness (WoF) regime. Under the Building Act 2004, buildings with specified systems — including mechanical ventilation, air conditioning, and certain heating plant — must obtain an annual WoF. That requires inspection and maintenance by competent service providers. For businesses holding maintenance contracts tied to WoF compliance, that's not discretionary revenue. It's legally mandated, recurring, and contractually locked in. From a buyer's perspective, that's as close to annuity income as you get in a trade services business.
Then there's the people problem. Gas fitting in New Zealand requires registration under the Gas Act 1992. Refrigeration work requires certified competency under the Refrigerants Ozone Layer Protection Regulations. These aren't credentials you can hire around quickly. NZ has a chronic shortage of certified technicians across the mechanical services trades, and training pipelines are slow. A business that has assembled and retained a team of registered, experienced technicians has built something genuinely hard to replicate — and buyers who understand the sector know it.
How a NZ Heating Business Is Typically Valued
Most heating and mechanical services businesses in New Zealand are valued on an EBIT (earnings before interest and tax) multiple basis. The multiple applied will range — typically between 3.5x and 6x EBIT, depending on a set of factors that experienced buyers apply consistently.
The key drivers that push you toward the upper end of that range:
Recurring contract revenue. Maintenance contracts, especially those tied to WoF or service-level agreements, are weighted heavily. A business deriving 60%+ of revenue from recurring contracts will attract meaningfully higher multiples than a business reliant on project or reactive work.
Team depth and certification. As noted above, certified technicians are scarce. A business where multiple senior staff hold relevant registrations — and where those staff are not all likely to leave post-sale — is materially more valuable.
Customer concentration. Revenue spread across many clients is more valuable than revenue concentrated in two or three accounts. If your three largest clients represent more than 40% of turnover, buyers will price that risk.
Owner dependency. How much of the business runs through you personally? If client relationships, technical decisions, or estimating are centralised in the owner, that's a transition risk buyers will discount against.
Clean financials. EBIT should reflect actual business performance, not years of mixed personal and business expenses. Getting three years of clean, normalised management accounts prepared before you go to market is time well spent.
Who's Buying NZ Mechanical Services Businesses Right Now
The buyer landscape in New Zealand for heating and mechanical services businesses has shifted materially in recent years. There are now three distinct categories to understand.
Trade buyers are the most familiar category — often competitors or adjacent businesses looking to acquire a customer base, gain regional coverage, or add capability. They understand your business, which is a double-edged sword: they'll price it accurately, but they're also likely to absorb it into their existing operation, which has implications for brand and staff.
PE-backed roll-ups are predominantly Australian-originated platforms that have moved into the NZ market. They move quickly, can pay competitive multiples, and often offer earn-out structures. The trade-off is that they're acquisition vehicles with finite investment horizons. Within five to seven years, they'll seek an exit — which means your business will be sold again, and you'll have limited control over to whom.
Permanent capital buyers are a newer category in the NZ market, and one most owners here haven't yet encountered. The model is well-established internationally. Scandinavian holding companies — Lifco, Indutrade, Judges Scientific — have spent thirty years building portfolios of exactly this type of niche industrial and technical services business. They acquire, hold indefinitely, preserve the brand and management team, and don't pursue integration or exit. The businesses they own continue to operate under their own names with genuine operational autonomy.
That model has arrived in New Zealand. PermaTech's acquisition of Tubman Heating Limited in 2024 is the clearest local example. Tubman was founded in 1984, built a 45-person team, and became one of Auckland's most respected industrial and commercial boiler and burner businesses over four decades. PermaTech acquired it as a permanent hold — the brand remained, the team remained, and the business continued operating as it had. That kind of outcome is now available to NZ heating business owners who know where to look.
What Happens to Your Team and Brand After the Sale
This is what most owners actually care about, even if they don't always say it first.
The honest answer is that it depends entirely on the buyer. A trade buyer acquiring you for your customer base has limited incentive to maintain your brand or retain staff beyond the transition period. A PE-backed roll-up will typically keep key staff through the earn-out period, after which integration decisions are made at the platform level.
A permanent capital buyer's model depends on continuity. Operational disruption destroys the thing they're paying for. The incentive structure is aligned with what most owners want: the team stays, the brand stays, the business continues.
The critical step is understanding who you're selling to before you sign anything. That means asking explicit questions about post-acquisition plans for staff, about whether the business will retain its name, and about what happens to client relationships. Get specific answers, in writing.
Equally important: confidentiality during the process. Most experienced buyers understand that premature disclosure to staff or clients damages the business they're acquiring. Reputable buyers will commit to confidentiality protocols that protect your team from uncertainty until a transaction is complete and a proper communication plan is in place.
When to Start Thinking About an Exit — and How to Approach It
The owners who get the best outcomes typically start preparing two to three years before they want to close a deal. That's enough time to clean up financials, reduce owner dependency, and position the business at the upper end of its valuation range.
That said, circumstances don't always allow for ideal timing. Market conditions, health, family considerations, or simply the right buyer appearing can compress that window. A business that's well-run will still transact — it just may not achieve the multiple it would have with more preparation time.
The first step isn't hiring a broker. It's forming a clear-eyed view of your own business: what drives its value, what constrains it, and what a realistic exit looks like. Some owners benefit from an initial, confidential conversation with a potential buyer before they engage any formal process — it's the fastest way to understand what buyers actually care about in your specific type of business.
Questions to Ask Yourself Before You Do Anything
Before you engage anyone — broker, buyer, or advisor — work through this list honestly:
- What percentage of revenue comes from recurring maintenance contracts versus project or reactive work?
- What certifications does your team hold, and who else in the business could manage technical decisions if you stepped back?
- How concentrated is your customer base? Could the loss of your two or three largest clients meaningfully alter the business?
- Are your last three years of financials clean and normalised, or do they require explanation?
- What does your lease situation look like — do you own or rent premises, and when does the lease expire?
- Do any key employees know you're thinking about selling? What's your communication plan?
- What outcome do you actually want — for yourself, for your team, and for the business?
- What's your view on a role post-sale — are you open to staying on in a transition or advisory capacity, or do you want a clean exit?
The answers to these questions will shape every aspect of the process: your timeline, your buyer list, your negotiating position, and your eventual outcome.
If you've read this far, you're probably at the point where a conversation — confidential, no obligation — would be more useful than more reading. PermaTech works with NZ industrial and technical services businesses and is always willing to have that conversation on your terms, at your pace. There's no pressure and no process required to have an initial discussion.