Connecticut does not use a general municipal rent-control system. Instead, state law authorizes fair rent commissions, local boards that review specific rental charges and proposed rent increases when a tenant files a complaint. A commission can determine that a charge is "harsh and unconscionable" and, after a hearing, order the rent reduced, phase in an increase, or suspend the tenant's rent obligation in certain health and safety situations. For a property manager, the important thing to understand is what a fair rent commission is and is not. It is not a rent cap, and it does not set rents across the board. It is a complaint-driven review board that acts case by case, on a specific unit. For property managers, the practical issue is understanding how the process works and what documentation can help support a rent increase if a tenant challenges it.

In short: A Connecticut fair rent commission is a municipal board that reviews tenant complaints about rents and can order an excessive rent reduced, phase in an increase, or suspend rent until health and safety violations are fixed. Public Act 22-30 originally required municipalities with populations of 25,000 or more to create a commission by July 1, 2023. Special Session Public Act 25-1 (2025), effective January 1, 2026, expanded the framework to municipalities with populations of 15,000 or more, with newly covered municipalities required to establish their own commission, or join a joint or regional commission, by January 1, 2028. This is not general rent control: a commission reviews rental charges on a case-by-case basis and can act when a specific charge is found, on defined factors, to be so excessive as to be harsh and unconscionable.

What a fair rent commission is (and is not)

A fair rent commission is a municipal board authorized by state statute and created through a local ordinance to hear tenant complaints about rental charges and act on charges that are excessive. Its statutory purpose under § 7-148b is twofold: to control and eliminate rental charges that are excessive, meaning harsh and unconscionable, and to enforce the landlord-tenant statutes that prohibit landlord retaliation and certain lapse-of-time evictions.

The distinction that matters most for a property manager is that this is not general rent control. Connecticut does not set a statewide or blanket municipal rent cap, and fair rent commissions provide the state's statutory mechanism for municipal review of excessive rental charges without creating a general rent-control system. A commission does not cap rents, set allowable increase percentages, or regulate the market, and it does not review individual rental charges as part of a general rent-setting process. Instead, its case-specific authority is generally triggered through a complaint and hearing, and it can act only if it finds, on specific statutory factors, that the particular charge is so excessive as to be harsh and unconscionable. Landlords remain free to set rents; what the commission provides is a case-by-case check on the outliers. Connecticut does not provide a general judicial process for tenants to challenge an ordinary rent increase simply because they consider it excessive; the fair rent commission framework is the specific statutory mechanism for reviewing excessive rental charges.

The mandate: from 25,000 down to 15,000

For most of their history, fair rent commissions were a scattered, local phenomenon, about 25 Connecticut towns had them, some dating back three decades, while most municipalities had none. That changed with Public Act 22-30 in 2022, and it has continued to expand since.

Connecticut's fair rent commission mandate originally applied to municipalities with populations of 25,000 or more. Under Public Act 22-30, municipalities with populations of 25,000 or more were required to adopt an ordinance creating a fair rent commission by July 1, 2023, and notify the state Commissioner of Housing within 30 days after adoption. That mandate roughly doubled the number of towns required to have a commission, adding around 27 municipalities to the pre-existing group.

The threshold was later lowered further. Under Special Session Public Act 25-1 (2025), "An Act Concerning Housing Growth," effective January 1, 2026, municipalities with populations of 15,000 or more are subject to the fair rent commission requirement, down from 25,000. Newly covered municipalities have until January 1, 2028 to comply, and they may satisfy the requirement either by establishing their own commission or by joining a joint or regional commission with neighboring municipalities. Smaller municipalities are still permitted to create or join a commission voluntarily, but are not required to.

Two practical points follow for a property manager. First, the direction of travel is clear: the mandate is expanding, not contracting, and many mid-size towns that previously had no obligation are now covered. Second, being subject to the mandate is not the same as already having an active commission, because newly covered towns have a compliance runway to January 1, 2028 and may satisfy it through a regional arrangement rather than a standalone local board. So a town in the 15,000-25,000 range may be covered but still in the process of standing up or joining a commission. The right move is to verify the specific municipality rather than rely on population alone.

Fair rent commission bylaws and public hearings

A 2025 change added transparency requirements to the framework. Under Public Act 25-121, effective July 1, 2025, any municipality that creates a fair rent commission must post a copy of the commission's adopted bylaws on the municipality's website, and fair rent commission hearings must be open to the public. For a property manager, this is practically useful: the posted bylaws can help you understand a specific commission's procedures and hearing practices before a complaint is ever filed, and they are worth reviewing for each municipality where you operate.

What a commission can actually do

Within the boundaries of the municipality (or region) it serves, a fair rent commission has substantial procedural and remedial powers under §§ 7-148b and 7-148d. On the procedural side, it may make studies and investigations, conduct hearings, receive complaints about rental charges, and, to carry out those functions, compel attendance at hearings, issue subpoenas, administer oaths, and issue orders, which it can later continue, review, amend, terminate, or suspend. Commissions are also expressly allowed to retain legal counsel.

On the remedial side, once a commission finds a charge harsh and unconscionable, it can:

• Order a reduction of the rent to an amount that is "fair and equitable."

• Phase in a rent increase over time rather than allowing it all at once.

• Suspend the tenant's obligation to pay rent when the accommodation fails to comply with a municipal ordinance or state health and safety law, until the landlord makes the necessary repairs or changes.

• Order a landlord to stop retaliating against a tenant who brought a complaint.

These are meaningful powers: a commission can effectively roll back an increase, stretch it out, or suspend rent collection on a non-compliant unit. But each is triggered by a complaint and a hearing, and each turns on the specific facts of the unit and the charge, not on a blanket rule.

The "harsh and unconscionable" standard: the 13 factors

The heart of a fair rent commission case is whether the rent or the proposed increase is "so excessive, with due regard to all the circumstances, as to be harsh and unconscionable." Section 7-148c identifies 13 circumstances that a commission considers, to the extent applicable to the type of accommodation. For a property manager, those factors double as a checklist of what to document to keep an increase defensible, so it helps to see them alongside the evidence that speaks to each.

What this list tells a property manager is that the commission is weighing the rent against the condition and value of what the tenant actually receives. An increase supported by comparable rents, a reasonable increase history, good unit conditions, and code compliance presents stronger evidence across these factors. A steep increase on a unit with open code violations and deferred repairs sits on the weak side, which is precisely the fact pattern these commissions were created to address.

The complaint and hearing process

A fair rent commission case begins when a tenant (or in some cases a prospective tenant) files a complaint with the commission serving the area where the unit is located, typically after receiving a rent increase they believe is excessive or while living with unresolved conditions. The commission investigates, and the matter proceeds to a hearing where both the tenant and the landlord can present evidence, testimony, documentation of conditions, comparable rents, repair records, and the like.

If the commission finds the charge harsh and unconscionable, it issues an order, reduction, phase-in, suspension, or an anti-retaliation directive, that binds within its jurisdiction. A party aggrieved by a fair rent commission decision may appeal to the Superior Court under Connecticut's administrative appeal procedures. For a property manager, the operational reality is that a fair rent complaint is a quasi-legal proceeding: it favors the party that can substantiate its position with organized documentation and leaves the party without supporting records in a weaker position.

Protected tenants: can they challenge a rent increase without a commission?

Two related protections sit alongside the commission system. First, certain protected tenants, generally those in buildings of five or more units who are at least 62 years old or who have a disability, have an additional route under § 47a-23c: they may contest an excessive rent increase in Superior Court even if they live in a municipality that has no fair rent commission. So the absence of a commission in a smaller town does not always mean a rent increase is beyond challenge.

Second, the commission system is backed by Connecticut's anti-retaliation protections. A landlord generally may not raise rent, decrease services, or pursue certain evictions in retaliation against a tenant for exercising rights, including filing a fair rent complaint. A rent increase or eviction that closely follows a tenant's complaint can itself become the subject of a retaliation finding, so timing and documentation matter: the file should show a legitimate, non-retaliatory basis for any adverse action that follows tenant activity.

The operational read for property managers

For a property manager in Connecticut, the fair rent commission does not cap a rent increase; it makes the increase reviewable, so the safe posture is to treat every significant increase as something you might have to justify and to build that justification in advance. In practice that means keeping units code-compliant and repairs current, documenting the comparable rents behind an increase, applying increases at a reasonable frequency rather than in sudden spikes, keeping clear records of the unit's condition and any reinvestment of rental income, confirming whether the municipality has its own or a regional commission, and handling any post-complaint increase or eviction on a clearly documented, non-retaliatory basis.

Two related resources help with the pieces of this that most often trip managers up. A well-structured rent increase, with the required notice, effective date, and a documented rationale, is far easier to defend before a commission, and RIOO's guide to writing a rent increase letter walks through that step. Keeping a clean rent and payments record gives you the rent history a commission may want to see, while documented market comparables can help support the basis for an increase, and because a fair rent complaint can arise in the same window as a lease-end dispute, it is worth aligning your process with the one in RIOO's Connecticut eviction guide.

Common mistakes to avoid

• Assuming a fair rent commission is rent control (it is complaint-driven and case-by-case, not a cap)

• Assuming a municipality below 25,000 is outside the framework (municipalities of 15,000+ are now subject to the mandate, with newly covered towns required to establish or join a commission by January 1, 2028)

• Assuming a newly covered town already has an active commission (it may still be standing one up or joining a regional one before the 2028 deadline)

• Relying on population alone instead of verifying the specific municipality's commission or regional arrangement

• Raising rent on a unit with open health or safety code violations (a route to an unconscionable finding, and possible rent suspension)

• Imposing a steep increase without documenting comparable rents to support it

• Treating a fair rent hearing casually rather than as a quasi-legal proceeding that rewards documentation

• Raising rent or pursuing eviction soon after a tenant complaint without a clear non-retaliatory basis

• Overlooking that protected tenants (62+ or disabled, in 5+ unit buildings) can go to Superior Court even where there is no commission

• Forgetting that "rental charge" includes fees and charges beyond base rent

Frequently asked questions

1. What is a fair rent commission in Connecticut?
It is a municipal board that reviews tenant complaints about rents and can order an excessive rent reduced, phase in an increase, or suspend rent until health and safety violations are fixed. It is authorized by the Fair Rent Commission Act (Conn. Gen. Stat. §§ 7-148b through 7-148f) and acts case by case on a specific charge.

2. Is a fair rent commission the same as rent control?
No. Connecticut does not have general local rent control, and the fair rent commission is a narrower mechanism. It does not cap rents or set allowable increases; it reviews a specific charge, case by case, and can act only if it finds that charge so excessive as to be harsh and unconscionable.

3. Can a Connecticut fair rent commission stop or reduce a rent increase?
Yes. After a hearing, a commission that finds a rental charge or proposed increase harsh and unconscionable may order the rent reduced to an amount it considers fair and equitable, or phase the increase in over time. It can also suspend rent payments in certain health and safety situations until repairs are made.

4. Which Connecticut towns must have a fair rent commission?
Under Special Session Public Act 25-1 (2025), effective January 1, 2026, Connecticut municipalities with populations of 15,000 or more are subject to the requirement, down from the 25,000 threshold set by Public Act 22-30. Newly covered municipalities have until January 1, 2028 to establish their own commission or join a joint or regional commission. Smaller municipalities may create or join one voluntarily. Because the change is recent, confirm the current status with the specific municipality.

5. How does a commission decide a rent is "harsh and unconscionable"?
It weighs the statutory factors in § 7-148c, including comparable rents, the amount and frequency of increases, the unit's sanitary condition and code compliance, the services and repairs provided, the landlord's taxes and overhead, the tenant's income, and whether increase income will be reinvested in the property. The rent is judged against the condition and value of what the tenant receives.

6. Does a fair rent commission review fees as well as monthly rent?
Yes. Under § 7-148b, "rental charge" includes any fee or charge imposed or sought to be imposed on a tenant by a landlord in addition to rent. So a commission's review of whether a charge is harsh and unconscionable is not limited to base rent; it can reach added fees and charges as well.

7. Can a landlord appeal a fair rent commission decision?
Yes. A party aggrieved by a commission's order may appeal to the Superior Court under Connecticut's administrative appeal procedures. Arriving at the original hearing with thorough documentation is the best way to avoid an adverse order in the first place.

8. Can a tenant challenge a rent increase if their town has no commission?
Generally only certain protected tenants can. Under § 47a-23c, tenants in buildings of five or more units who are at least 62 or who have a disability may contest an excessive increase in Superior Court even without a local commission. Other tenants may have fewer avenues to challenge the amount of a rent increase solely on the ground that it is excessive, so the applicable statutory protections and local rules should be checked for the specific situation.

9. Can a landlord retaliate after a fair rent complaint?
No. Connecticut's anti-retaliation protections generally bar a landlord from raising rent, cutting services, or pursuing certain evictions in retaliation for a tenant filing a complaint or exercising other rights. An adverse action that closely follows a complaint can support a retaliation finding, so any such step needs a clear, documented, non-retaliatory basis.

This article is for general informational purposes and is not legal advice. Fair rent commission requirements are changing and vary by municipality, and additional changes were proposed during the 2026 legislative session, so confirm the current statute and local commission rules with the specific town, a Connecticut attorney, or the state Department of Housing before acting. The framework here rests on Connecticut's Fair Rent Commission Act (Conn. Gen. Stat. §§ 7-148b through 7-148f), as amended by Public Act 22-30 (2022), Special Session Public Act 25-1 (2025), and Public Act 25-121 (2025).