If you run a trades business — construction, electrical, plumbing, HVAC, roofing, or any of the dozens of related trades — and you are thinking about what it might be worth when you eventually sell, there are a few things you need to understand that are specific to your industry.

Trades businesses are valued differently from professional services firms, retail operations, or technology companies. The fundamentals of valuation are the same, but the factors that drive the multiple up or down are distinct — and many trades business owners are surprised by the gap between what they expect and what the market will actually pay.

How Trades Businesses Are Typically Valued in NZ

The most common approach for established, profitable trades businesses is an earnings-based valuation using EBIT or EBITDA multiples. The starting point is your normalised earnings — your profit after adding back owner-specific expenses, one-off costs, and non-cash items — and a multiple is applied based on the size, risk profile, and growth prospects of the business.

In the NZ market, trades businesses typically sell at 2–4x EBITDA. That is a wide range, and where your business sits within it depends almost entirely on the risk factors a buyer will identify. For a broader overview of how valuation works across different business types, see our guide on business valuation in NZ.

A small, owner-operated trades business where the owner is the primary tradesperson, the key customer relationship holder, and the person who does all the quoting and project management might achieve 2–2.5x. A well-systemised trades business with a capable management team, documented processes, and diversified revenue might achieve 3.5–4x or more.

The difference between those two outcomes — on the same earnings — can be hundreds of thousands of dollars.

The Biggest Value Driver: Owner Dependency

In most industries, owner dependency is a significant value risk. In trades businesses, it is often the dominant factor.

Here is why: trades businesses are frequently built around the founder's personal skills, relationships, and reputation. The owner is often the best tradesperson on the team, the person customers trust, the one who quotes the complex jobs, and the one who solves the problems when things go wrong.

That is a powerful business model for building revenue. It is a terrible model for selling a business.

A buyer looking at a trades business will ask: what happens to this business when the owner leaves? If the honest answer is "it probably falls apart," the buyer will either walk away or offer a price that reflects that risk — often with a significant earn-out component that keeps the owner tied to the business for two or three years post-sale.

Reducing owner dependency is the single most important thing a trades business owner can do to increase their sale price. That means building a management layer, transitioning key customer relationships to other people in the business, documenting your systems and processes, and demonstrating that the business can operate without you. See our detailed guide on how to reduce owner dependency.

Other Factors That Drive the Trades Business Multiple

Beyond owner dependency, buyers will look at several other factors when assessing a trades business:

Revenue quality and concentration. A business with a diversified customer base — no single customer representing more than 15–20% of revenue — is worth more than one that depends heavily on one or two large clients. Recurring revenue (maintenance contracts, service agreements, preferred supplier arrangements) is worth more than project-based revenue.

Workforce stability. Trades businesses live and die by their people. A stable, skilled workforce with low turnover is a significant asset. High turnover, reliance on subcontractors, or a team that is loyal to the owner rather than the business are all risk factors that buyers will price in.

Licensing and compliance. Are all your licences, registrations, and compliance obligations current and transferable? Buyers will scrutinise this carefully. Any gaps or uncertainties create risk and reduce value.

Equipment and vehicles. The condition, age, and ownership structure of your plant, equipment, and vehicles matters. A business with well-maintained, owned assets is worth more than one with aging equipment or complex lease arrangements.

Financial clarity. Trades businesses often have complex financials — job costing, WIP (work in progress), retentions, and owner-specific expenses. A buyer needs to be able to understand your numbers clearly. Clean, well-documented financials with a clear normalisation story are worth more than messy ones.

Growth trajectory. A business that is growing — in revenue, in margin, or in the number of qualified tradespeople — is worth more than one that is flat or declining.

The Normalisation Process

One of the most important steps in valuing a trades business is normalising the earnings. This means adjusting the reported profit to reflect what the business would earn under new ownership.

Common normalisation adjustments for trades businesses include:

• Owner's salary. If you are paying yourself above or below market rate, the earnings need to be adjusted to reflect a market salary for someone doing your role.
• Personal expenses. Vehicle costs, phone, travel, and other expenses that are personal but run through the business need to be added back.
• One-off costs. Legal disputes, equipment write-offs, or other non-recurring expenses should be excluded from the normalised earnings.
• Related-party transactions. If you own the premises and charge the business rent, or if you have other related-party arrangements, these need to be assessed at market rates.

Getting the normalisation right is important — both to ensure you are not underselling the business and to ensure the numbers will stand up to buyer scrutiny.

How to Increase Your Trades Business Value Before You Sell

The good news is that most of the factors that drive valuation are within your control — if you have enough time to act on them. The bad news is that meaningful change takes time. You cannot manufacture a capable management team or a diversified customer base in six months.

The most impactful things you can do, in rough order of priority:

1. Reduce owner dependency — build a management layer, transition key relationships, document your systems
2. Diversify your revenue — reduce customer concentration, build recurring revenue streams
3. Stabilise your workforce — invest in retention, build a team that is loyal to the business
4. Clean up your financials — get three years of clean, well-documented accounts
5. Sort your compliance — ensure all licences, registrations, and obligations are current and transferable

This work typically takes two to four years to make a meaningful difference to your valuation. Which is why starting your exit planning early matters so much.

Getting a Proper Valuation

If you have never had a formal valuation of your trades business, that is the right place to start. Not a rough estimate from your accountant, and not a number you have arrived at yourself — a structured assessment that looks at your normalised earnings, your risk profile, and the relevant market comparables.

At Ridgeline Advisory, the Diagnostic phase includes a valuation assessment as part of a broader review of your business's exit readiness. It gives you a realistic picture of where you stand — and a clear view of what needs to change to achieve the outcome you are planning for.

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Ridgeline Advisory works with Canterbury and NZ trades business owners on succession and exit planning. Start with a Diagnostic to understand what your business is really worth — or read more about what succession planning involves.