Stellos Research · Valuation · Office & Commercial

How Appraisers Value Parking Income

Every parking operator will tell you their platform raises your revenue. Almost none will tell you the uncomfortable rule that governs what happens next: when an institutional appraiser values your building, only the parking income that is written into contracts moves the number. Hourly rotation, visitor fees and event spikes are real money, but in an appraisal they are cashflow, not value. Understanding that distinction, and managing your garage around it, is the difference between parking revenue that impresses a fund and parking revenue that dies in due diligence.

Stellos operates live parking optimisation across Switzerland and Germany for real estate owners, investors and corporates. The methodology below was reviewed with an institutional valuations practitioner and is the same logic the Stellos audit applies. Stellos parking platform · trusted by Google, Swisscom, Implenia, Wincasa, CWS and Sony.

1. The rule appraisers actually apply

Commercial real estate is valued primarily on the income approach: the property's stabilised net operating income divided by a capitalisation rate. But not every franc of income qualifies. Appraisers capitalise income that is durable, evidenced and transferable, which in practice means income backed by signed agreements: leases, rental contracts, service agreements with defined terms. Income that depends on tomorrow's demand showing up again, however consistently it has done so, is treated as operating performance, not as an attribute of the asset.

For a parking garage attached to an office or commercial building, that draws a sharp line through the revenue statement. A monthly parking spot lease with a tenant is an attribute of the asset: it survives a change of owner, it can be verified in the rent roll, and a buyer can underwrite it. An hourly fee paid by a visitor who happened to drive in is not: it belongs to whoever operates the garage well that day.

2. Two drawers: contractable and variable income

The cleanest way to think about parking income is to sort every revenue stream into one of two drawers.

The contractable drawer feeds the valuation. The variable drawer feeds the operating account. Both are worth managing, but they answer different questions: the first answers "what is this building worth", the second answers "how well is this garage run this quarter".

3. A worked example: one garage, two numbers

Take a 100 parking spot garage under a Swiss office building. After optimisation it produces:

Assume CHF 30,000 of annual operating costs allocated to the garage and a 5.0% capitalisation rate for the asset class and location.

• Contracted NOI: 180,000 + 32,400 − 30,000 = CHF 182,400. Capitalised at 5.0%, the garage contributes about CHF 3.65 million of asset value.
• The naive calculation adds the CHF 45,000 of rotation, capitalises CHF 227,400 and claims about CHF 4.55 million. The extra CHF 0.9 million is phantom value: no appraiser will sign it, and a buyer's due diligence will strip it out in the first pass.
• The rotation is still worth CHF 45,000 a year, every year. It pays for operations, funds tenant benefits, or simply drops to the bottom line. It just is not part of the building's value.

Figures are illustrative of the mechanism, not a benchmark. Actual rates, occupancy and cap rates depend on the address and asset class, which is what a property level audit establishes.

4. Why this matters when a fund is on the other side of the table

Institutional buyers, fund managers and their appraisers apply this rule reflexively. A parking business case built on capitalised rotation reads, to them, as either naivety or salesmanship, and it taints the credible part of the case along with it. The owners who do best in these conversations show up with the two drawers already separated: a contracted income line the appraiser can verify against signed agreements, and a variable cashflow line presented as operating upside.

This is also why "our platform raised garage revenue 30%" and "our platform raised your building's value" are not the same claim. The first can be true while the second is false. The second becomes true only to the extent the new revenue is contracted.

5. The real lever: converting rotation into contractable income

The strategic consequence is that the most valuable thing a parking operator can do for an owner is not to maximise rotation. It is to convert rotational demand into contracted demand. The instruments are ordinary and well understood:

Fixed price passes

A commuter who parks four days a week on hourly rates is variable income. The same commuter on a weekday 24/5 pass at a fixed monthly price is a recurring subscription, and a portfolio of such passes is income a buyer can underwrite. Night and weekend passes do the same for the off peak hours that office garages otherwise waste.

Anchor agreements

A hotel with overflow demand, a clinic with staff parking pressure, a retailer with weekend peaks: each is a candidate for a signed volume agreement at a committed rate. One anchor agreement can move more appraised value than a year of well managed rotation.

Writing terms into leases

Where parking income touches existing tenants, the durable version of the uplift is the one written into the lease or its riders at the next renewal. An appraiser reading a rent roll that includes parking terms capitalises them like any other rent.

Managed this way, the garage's valuation contribution grows with each conversion, and the variable drawer refills behind it as new rotational demand arrives. The two numbers rise together, but each for its own honest reason.

6. What the variable share is still for

None of this makes rotation worthless. Variable parking income is unallocated free cashflow, and owners use it deliberately: to fund tenant benefits and courtesy parking, to underwrite mobility and ESG programmes, or to smooth the garage's operating budget. Several owners we work with treat the variable drawer explicitly as their tenant experience budget, which turns a valuation footnote into a leasing argument.

7. How the Stellos audit applies this

The Stellos calculator models both drawers separately and capitalises only the contractable share into asset value for lease based buildings such as offices, residential and logistics. Retail and hotel assets, where visitor income is the operating income of the asset class, are treated on a full operating basis, the way their appraisers treat them. The audit shows the contracted uplift, the variable cashflow, and what converting one into the other would do, address by address.