Market Rent for Homes and Commercial Space Explained

Getting the rent level wrong punishes you in both directions. Set it too high and the unit sits empty, or a case rolls the level back with repayment on top. Set it too low and you lose return year after year with no way to claw it back. The difference between a rent that holds and one that gets overturned rarely lies in the figure itself — it lies in the basis behind the figure.

That basis is not a well-reasoned estimate. It is a documented comparison against leases that genuinely resemble what you are letting. This article brings together how market rent is set for both residential and commercial property, how it is documented, and what actually happens when the parties disagree and the rent has to be tested.

What market rent actually is — and what it is not

Market rent is the rent a qualified landlord and a qualified tenant would agree for the specific unit on the existing market, with neither party under pressure. It is an assessment of what exists right now — not a projection of where rent is heading. That distinction is decisive, because an assessment resting on expected increases will not hold when it has to be tested.

For commercial leases, market rent is the central concept. The rent is agreed freely between the parties, but each party can in principle demand the rent be adjusted to market rent if the agreed rent deviates significantly from the level. This is where the documentation makes all the difference.

For residential leases the picture is more layered. Depending on the property’s age, location and when it was first taken into use, the rent may be subject to different regulatory regimes — from freer market-based rent to cost-determined rent and what is known as the value of the let. Market rent and the value of the let are not the same concept, and the two often lead to different figures for the same home. That distinction is so central it deserves its own treatment — we have set it out in the article on the difference between market rent and the value of the let.

Rule of thumb: Market rent describes what the market actually pays today. The value of the let is a regulatory concept that measures against a selection of comparable leases — and can fall below the market.

The point for the professional is simple: work out which set of rules the unit is subject to before you set a figure at all. A market-based figure on a unit governed by cost-determined rent or the value of the let is not just too high — it is the wrong basis.

Rent setting for residential: which track are you on?

Residential letting requires you first to place the unit on the right regulatory track, because the track determines both the method and the ceiling for the rent.

The typical tracks

• Free/market-based rent: Typically applies to newer properties and certain comprehensively improved units. Here market rent sits closest to what you can agree, but the requirements for a comprehensive improvement to be genuine and documented are tightened.
• Cost-determined rent: The rent is calculated from the property’s operating expenses plus a return on the property value and provisions. Here the accounts and the budget carry the rent — not the market.
• The value of the let: The rent is tested against what is paid for comparable units in terms of location, type, size, quality, fittings and state of maintenance.

The rules on the residential side are detailed and change over time, and both municipality and property age affect which track applies. Always verify the current regulation for the specific property before fixing the level — either in the applicable tenancy legislation or with the relevant rent tribunal secretariat.

What you document

Whatever the track, the core is the same: you must be able to show that the level corresponds to comparable leases. That means gathering rent levels for homes that genuinely resemble yours — same geography, same size range, same condition and same standard of fittings. A three-room flat in a freshly renovated property cannot be justified by a three-room flat two streets away if its condition sits a notch below.

Rent setting for commercial: market rent per m²

For commercial leases, commercial market rent governs, and in practice the level is set through a rent level per m². It sounds simple, but the figure conceals a series of variables that can each shift the level significantly.

It is never just one figure per m²

A realistic rent level per m² depends on:

• Use: Ground-floor retail, office, warehouse and production sit at widely different levels — even in the same building.
• Location at a granular level: For retail, the frontage, corner and pedestrian-street position matter more than the postcode. For office, access, parking and public transport weigh heavily.
• Effective versus gross: What counts in the area, and how large is the common-area share? A figure per m² without a clear area definition is not comparable.
• The lease terms: Non-terminability, indexation, allocation of maintenance, deposit and any rent-free periods affect what the “clean” rent really is. Two contracts with the same figure per m² can have widely different economics.

That is why the most common mistake is to compare a nominal figure per m² without normalising for the terms behind it. We have written a practical walkthrough of how you find a realistic rent level per m² in commercial leases, which takes the normalisation step by step.

Adjustment to market rent

In commercial tenancies, a party can typically demand the rent be adjusted to market rent when the agreed rent deviates significantly from the current level, and when certain conditions — including a time-based one — are met. The consequence is that both landlord and tenant have an interest in knowing the real market level on an ongoing basis, not only at the point the contract is signed. The rules for when and how an adjustment can be demanded should always be verified in the applicable commercial tenancy legislation, as the conditions are specific.

Comparable leases: the documentation that carries the level

Whether for residential or commercial, a rent setting stands or falls on the comparable leases. This is where an assessment either becomes robust or crumbles at the first push-back.

A usable comparable lease must resemble yours on the parameters that genuinely drive the rent:

• Geography: Close by, and in an area with comparable demand.
• Type and use: The same kind of unit and the same use.
• Size: Within a reasonable size range — rent per m² is rarely linear across very different sizes.
• Quality, fittings and condition: The point that most often invalidates a comparison. A freshly renovated unit cannot carry the level of one with deferred maintenance.
• Currency: Leases agreed long ago do not necessarily reflect the existing market.

The point is not to find the one perfect comparable lease, but to build a group that together frames a level — and to be able to explain every deviation. When a comparable lease sits above or below yours, you must be able to point to why: better location, newer condition, a different contract structure. A comparison without that explanation is easy to attack. We go into depth on how you substantiate and test a rent with comparable leases, including how deviations are documented so they hold.

When the parties disagree: testing in practice

A rent level that is never challenged does not prove it was right — it is only under a test that the basis is decided. So the level must be built to withstand that scrutiny from day one.

Residential

For residential leases, the rent tribunal is the central body when there is disagreement over the size of the rent. The tribunal assesses whether the rent exceeds what the rules permit — depending on the track, either the cost-determined calculation or the value of the let against comparable leases. If the rent is overturned, the consequence can be reduction and repayment of rent overcharged. That is why a residential level set too high is not only a vacancy risk but a real repayment risk.

Commercial

For commercial leases, disagreement over market rent is settled through negotiation and, failing that, in the courts, where comparable material and often expert appraisal come into play. Here the quality of your comparable basis weighs heavily: a well-documented level, normalised for contract terms and condition, stands far stronger than a nominal figure per m².

The common principle

In both tracks, the party with the best-documented, most comparable basis stands strongest. Testing does not reward whoever had the highest or lowest figure — it rewards whoever can show how the figure was arrived at. In concrete terms, that means:

• Keep the documentation for each comparable lease, not just the conclusion.
• Note which terms you have normalised for, and how.
• Keep the basis current — a level from long ago is not a defence today.

From single unit to portfolio

The manual exercise scales poorly. Setting and documenting market rent for a single unit is manageable; doing it consistently across a portfolio with ongoing re-lettings and adjustment cases is an entirely different task. The risk is that the levels drift apart, and the documentation becomes uneven — precisely where a single overturned case can set a precedent for the rest of the portfolio.

That is why it is worth separating two things: the individual rent setting, where the comparable leases carry the level, and the portfolio management, where the method has to be uniform and retrievable. We have dealt with the latter separately in the walkthrough of how market rent is estimated at portfolio level.

How Arcili automates the manual exercise

What this article describes — place the unit on the right track, find comparable leases, normalise for condition and terms, and keep the documentation that carries the level — is exactly what Udlejningsvurdering (Rental valuation) in Arcili does systematically. Instead of manually hunting for comparable leases and keeping track of what sets them apart, a market rent level is estimated from the current market and comparable leases, with the basis that makes the figure defensible under a test.

It does not replace the professional judgement of the valuer or administrator — it removes the hours of gathering and normalising the basis, so the assessment can focus on what genuinely requires professional judgement. If you want to see how it looks on a specific unit or across a portfolio, start with Arcili or book a walkthrough.