Plumbing businesses in Castellón: buying, selling and valuation
In the statistical classification of activities, plumbing shares a class with heating and air conditioning, and that class is part of the specialised construction division. It is at that level that the INE (Spanish National Statistics Institute) publishes data by province: 2,597 establishments in Castellón at the start of 2025, 12.2% of the total for the Valencian Community (Comunidad Valenciana). The figure includes all the specialised building trades, so it does not show how many plumbing businesses there are.
When a plumbing business is closely tied to its area and its phone number, the challenge in selling it is to show that customers call the company and not just the person who runs it.
Plumbing · Castellón in figures
Active establishments in the province (CNAE activity code 43)
2,597
Share of the Valencian Community
12.2%
Active companies in the province (all activities)
40,045
What affects the value of plumbing businesses in Castellón
Where the jobs come from says a lot about value. A business that receives call-outs from insurance companies, property managers or maintenance firms has a steady flow of work, but also depends on a few referrers who may change supplier. One that lives on private customers has a more spread-out client base, though a less predictable one. The buyer will want to see turnover by channel and how long each relationship has lasted.
Emergency call-outs are an asset when they are organised: defined on-call rotas, known response times and a system for logging calls. If everything goes through the owner's mobile, the buyer perceives that the business will leave with them. Transferring the phone number, the search engine listing and the reviews, and introducing the team to repeat customers, are part of the transaction.
On the material side, the fleet, the leak detection or drain unblocking equipment, the storeroom and any rented premises are reviewed. And on the contractual side, the terms agreed with insurers or property managers: agreed prices per job, payment terms and clauses that allow the agreement to be terminated if ownership changes.
Indicative valuation multiples
| Method | Range | Median |
|---|---|---|
| SDE (small businesses) | 2× – 3.5× | 2.8× |
| EBITDA (medium-sized businesses) | 3.5× – 6× | 4.5× |
Frequently asked questions
The INE does not publish this by province. The figure available, 2,597 establishments, corresponds to all specialised construction and also includes electricians, HVAC installers and other building trades.
Yes, because it brings constant volume, but the buyer will analyse how much it depends on each company, what margins that work leaves and whether the agreement can easily be terminated. A portfolio spread across several insurers and direct customers reduces the perceived risk.
Yes, although what is transferred then is the elements of the business, such as the customer base, equipment, vehicles or the lease of the premises, and not a company. The tax consequences differ in each case, so it is worth confirming this with a tax adviser before deciding how to structure the sale.
Prepare a transition: stay alongside the buyer for a while, introduce them to the main customers and property managers, and document how call-outs are handled. The clearer that plan, the smaller the part of the price that will be conditional on future results.
In a small plumbing business the equipment is usually worth little on its own. The value lies in the repeat customers, the agreements with those who generate the call-outs and a team able to handle them, provided that this income can be shown in the accounts.
Other sectors in Castellón
HVAC and air conditioningElectrical installationCommercial cleaningManufacturing and industryConstruction and refurbishmentDistribution and logisticsProfessional servicesHospitality and restaurantsHealth and wellbeingRetailSolar energySecurity and alarmsTechnology and ITProvince of CastellónWhat is your business worth?
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- Instituto Nacional de Estadística (INE): Locales por provincia, actividad principal (divisiones CNAE 2009) y estrato de asalariados
- Instituto Nacional de Estadística (INE): Locales por CCAA, actividad principal (grupos CNAE 2009) y estrato de asalariados
- Instituto Nacional de Estadística (INE): Empresas por provincia y estrato de asalariados
Latest official data available on the date given for each source.
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