Market Rent vs. Value of the Let: What's the Difference?

Ask three professionals about the rent on a given tenancy and you risk getting three answers — not because they disagree on the figure, but because each is standing on a different basis. “Market rent”, “the value of the let” and “free-market rent” get used interchangeably for the same question: what should the rent be? But the three concepts rest on different foundations and do not apply to the same tenancies. Confuse them, and you set the rent against the wrong yardstick — and a rent set against a yardstick that does not apply to the specific tenancy can be reduced.

The distinction is not academic. For a property manager, it determines which figure goes into the contract. For a valuer, it determines which method supports a valuation. And for an agent, it determines what you can actually promise an investor about the income. The central concept to have a firm grip on is the value of the let, because it is the legal brake that exists across large parts of residential letting — regardless of what the market says you could charge.

Market rent: what the market actually pays

Market rent is an economic concept. It is the rent a square metre can actually achieve on the existing market for a comparable tenancy — same condition, same order of magnitude, same location, same terms. It is set from the bottom up, based on what is actually offered and transacted, not on a rule about what the rent may be.

For commercial leases, market rent is the governing measure as a starting point. Danish commercial tenancy law is built on freedom of contract, and the rent can be adjusted to the market rent through the mechanisms the law prescribes. Here, market rent is not just a bearing — it is the legal level to which the rent can be brought up or down.

For residential tenancies, the picture is different. Here market rent is often only a bearing, because a rule may sit on top and set the ceiling lower. The market may say one figure; tenancy legislation may say another. That is precisely where the value of the let comes in.

Rule of thumb: market rent tells you what you can get. The value of the let tells you what you may charge. On the residential side, it is often the lower of the two that applies.

The value of the let: the legal yardstick for residential tenancies

The value of the let is a legal concept from tenancy legislation. It is the rent that may lawfully be charged for a tenancy, established by comparison with the rent in equivalent tenancies — tenancies of the same kind, size, quality, fittings and location. The point is that the rent must not substantially exceed what is paid for the comparable ones.

The difference from market rent lies in what you compare against. Market rent compares with what is offered on a free market. The value of the let compares within the existing stock of tenancies, which may itself be regulated. If the surrounding tenancies are subject to regulation, that pulls the value of the let down — even if a free market outside would pay more. That is why the two figures can sit far apart in the same buildings.

Which rule applies to the individual tenancy depends, among other things, on the age and size of the property and on whether the municipality is a regulated municipality. It is a case-by-case assessment that should be tested against the current tenancy legislation and against the relevant municipality before a figure is fixed — the rules in this area are detailed and change continually.

Where the value of the let is typically decisive

• Older residential properties where the rent is not cost-determined but set according to the value of the let.
• Tenancies where the tenant brings an agreed rent before the rent tribunal, arguing that it exceeds the value of the let.
• Re-letting, where the landlord must assess how high the rent can lawfully be set without later reduction.

Cost-determined and free-market rent: the two other extremes

Between the two concepts sit two rent-setting principles that frequently intrude on the conversation.

Cost-determined rent is calculated from the top down, based on the property’s operating expenses plus a return on the invested capital — not on comparison at all. It typically applies to larger properties in regulated municipalities. Here neither market rent nor the value of the let is the starting point for the base rent; the budget is.

Free-market rent is the other extreme: tenancies where the rent can be freely agreed because they fall outside the stricter regulation — for example certain comprehensively improved tenancies or newer construction depending on the date of first occupancy. Here the lawful rent approaches the market rent, because the value-of-the-let brake does not bind in the same way. If you want to understand when a tenancy can actually be let at free-market rent, and what that means for valuation, take a closer look at the rules in the review of when free-market rent applies to residential tenancies.

The point is that “what may the rent be” rarely has a single answer. It depends on which set of rules the tenancy falls under — and that is a legal classification, not a market estimate.

Why comparison is the common axis

Both market rent and the value of the let rest on comparison — but each with its own reference set. That makes the comparable leases the decisive evidence, regardless of which concept you are working with.

A solid set of comparables means, in practice, tenancies that resemble the specific one on the parameters that move the rent: floor area, condition, location, fittings, balcony, maintenance standard and contract terms. A figure without a documented set of comparables is an assertion — not a valuation. This holds whether you have to substantiate a rent before a tribunal or defend a return to an investor. How you concretely build and test that basis is covered in the method behind comparable leases and rent substantiation, just as the setting and substantiation itself, for both residential and commercial, is described in the review of how market rent is set and substantiated.

Checklist before you fix a figure

• Classify the tenancy first. Which set of rules applies — free-market rent, the value of the let, cost-determined? That determines which yardstick binds.
• Verify the objective data. Floor area and year of construction from the BBR (the Buildings & Dwellings Register), ownership from the tingbogen (the Land Registry) and CVR (the Central Business Register). A wrong floor area shifts the rent per square metre directly.
• Build the set of comparables. Find actual tenancies — not estimates — that match on the load-bearing parameters.
• Separate “can” from “may”. Note both the market rent and the lawful rent, and be explicit about which one governs.

When the concepts get confused: three typical mistakes

1. Letting an older regulated dwelling at market rent. The market may pay the figure, but the rent can be brought before the tribunal and reduced to the value of the let. The lost difference can run backwards in time.
2. Valuing a residential portfolio on market rent without testing the lawful rent. The return looks strong on paper but rests on a rent that is not sustainable. It is a classic due-diligence trap — related to the other matters in a due-diligence checklist for a site or property.
3. Transferring commercial logic to residential. In commercial, market rent often governs; in residential, a rule may sit on top. The habit that works in commercial agency can cost you on the residential side.

From two concepts to one defensible figure

In practice, a defensible rent figure requires keeping the two concepts apart and answering each on its own: what the market pays, and what the rules permit. The manual work consists of classifying the tenancy, pulling the objective data from the public registers and building a set of comparables from actual tenancies that match on the load-bearing parameters.

Arcili’s Udlejningsvurdering (Rental valuation) automates that exercise: it estimates the market rent from active listings and transaction data for comparable tenancies and links it to the objective property data from the BBR and the matriklen (the cadastre), so you see the market level and the set of comparables together — the “can” figure that you subsequently hold up against the lawful yardstick. It does not replace the legal classification of which set of rules the tenancy falls under; but it removes the hours of collecting and matching comparable material, so you can spend the time on the assessment instead of on the data gathering.

If you want to see how the market-rent estimate and the set of comparables fit together for your specific tenancies, explore Arcili or book a walkthrough.