Michigan Condo Quorum & Supermajority Calculator — 2/3 Amendment, 80% Termination (MCL Sec. 559.151, 559.190, 559.222)

How this calculator works

This is a quorum-and-threshold validator for Michigan condominium co-owner votes under the Michigan Condominium Act. Given the total co-owners, in-person attendance, proxy count, vote type, and any bylaw-specified overrides, it returns:

1. Whether quorum has been met (total co-owners present and by proxy compared against the bylaw-specified quorum or the 51% common default).
2. The yes votes required to pass for the vote type — 2/3 of votes for master deed amendments under MCL Sec. 559.151, 66 2/3% of value for bylaws amendments under MCL Sec. 559.190(2), 80% of votes for termination under MCL Sec. 559.222, and majority of quorum for regular votes and director removal under MCL Sec. 559.231.
3. The current outcome (PASSED, FAILED, PENDING, or NO-QUORUM) based on the supplied tally.

Use the calculator before convening a co-owner meeting to confirm the procedural framework, during ballot counting to validate the threshold, and after a meeting to memorialize the outcome in the secretary's minutes.

The relevant MCL Sec. 559 statute

The Michigan Condominium Act lives at MCL Sec. 559.101 through MCL Sec. 559.276. Voting and quorum provisions are concentrated in MCL Sec. 559.151 (master deed amendment), MCL Sec. 559.190 (co-owner voting and bylaws amendment), MCL Sec. 559.222 (termination), and MCL Sec. 559.231 (director removal). The Act is materially LESS PRESCRIPTIVE than the Uniform Common Interest Ownership Act adopted in Washington and Connecticut — quorum and most procedural matters are delegated to the bylaws.

MCL Sec. 559.190(1) — Each co-owner has one vote unless the master deed allocates differently (commonly by percentage of value). The Act does not impose a statutory quorum floor — the bylaws specify the quorum requirement. Many Michigan bylaws default to 51% (majority of co-owners), but 20-33% bylaws are common.

MCL Sec. 559.190(2) — Bylaws may be amended by a vote of co-owners representing AT LEAST 66 2/3% of the VALUE of the condominium. The 66 2/3% floor is statutory; bylaws may specify higher but not lower. Note that this threshold is by VALUE (percentage of value), not by count of co-owners.

MCL Sec. 559.190(3) — Proxies are permitted for co-owner voting unless the master deed or bylaws prohibit. The proxy must be in writing and dated; bylaws commonly limit proxy validity to 11 months.

MCL Sec. 559.151 — Master deed amendments require approval of co-owners representing AT LEAST 2/3 (66 2/3%) of the votes in the condominium. The master deed may specify higher (commonly 75% or unanimous for fundamental changes). Certain amendments (changes to percentages of value, common-element boundaries, unit additions or withdrawals) typically require higher thresholds or unanimous consent under the master deed itself.

MCL Sec. 559.222 — Termination of the condominium requires approval of co-owners representing AT LEAST 80% of the votes in the condominium. The master deed may specify higher. Termination dissolves the condominium and reverts the property to undivided fee ownership or whatever the master deed specifies.

MCL Sec. 559.231 — Directors may be removed at a co-owner meeting subject to the bylaw provisions. The Act does not impose a statutory removal-threshold floor; bylaws fully control. Most Michigan bylaws specify majority of those present.

Michigan-specific gotchas (NO super-priority, nonjudicial advertisement foreclosure permitted, no statutory resale-disclosure regime)

MAJORITY OF TOTAL vs MAJORITY OF QUORUM. The two thresholds produce different outcomes when turnout is low. Michigan uses OF-TOTAL for master deed amendments (MCL Sec. 559.151 — 2/3 of votes), bylaws amendments (MCL Sec. 559.190(2) — 66 2/3% of value), and termination (MCL Sec. 559.222 — 80% of votes). Michigan uses OF-QUORUM (or "of those present and voting") for regular governance votes and director removal. The OF-TOTAL thresholds are intentionally hard to reach for property-affecting changes; the OF-QUORUM thresholds make routine governance practical at typical Michigan condo turnout levels (often 30-50%).

A MASTER DEED AMENDMENT CAN FAIL EVEN WITH 100% OF VOTERS APPROVING. In an 80-co-owner condo with 50% turnout (40 voters), 40 yes votes (100% of voters) is only 50% of total — well short of the 54-vote (2/3) threshold and the amendment FAILS. Boards routinely announce master deed amendments as passed based on majority-of-voters math; this is wrong. The calculator distinguishes the two thresholds explicitly to prevent this error.

QUORUM IS BYLAW-DEPENDENT, NOT STATUTORY. Unlike UCIOA states where the Act sets a quorum floor (Washington 25% under RCW 64.90.435; Connecticut 20% under CGS Sec. 47-252), the Michigan Condominium Act delegates quorum entirely to the bylaws under MCL Sec. 559.190(1). Pull the recorded bylaws BEFORE any meeting and find the quorum clause. Practical effect: Michigan condo governance is more bylaw-dependent than UCIOA state governance; the same procedural question can have different answers in two Michigan condos that are otherwise identical.

BYLAWS AMENDMENTS ARE BY VALUE, NOT BY CO-OWNER COUNT. MCL Sec. 559.190(2) sets the bylaws-amendment threshold at 66 2/3% of the VALUE of the condominium. This is a percentage-of-value vote, not a per-co-owner vote. The master deed assigns each unit a percentage of value (typically based on square footage or other rational basis) that totals 100%. A bylaws amendment that wins 67% of co-owners by count may fail if the dissenting co-owners hold higher-value units totaling more than 33.33% of value. The calculator simplifies by treating percentage of value as analogous to co-owner count; for precise bylaws-amendment votes, convert co-owner counts to percentage-of-value totals before using the calculator.

MASTER DEED AMENDMENTS MAY REQUIRE UNANIMOUS CONSENT FOR PROPERTY-AFFECTING CHANGES. MCL Sec. 559.151 sets the 2/3 floor, but the master deed itself typically requires HIGHER thresholds or unanimous consent for amendments that alter co-owner property rights — changes to percentages of value, common-element boundaries, unit additions or withdrawals, and similar fundamental changes. The calculator does NOT model these heightened-consent categories; if your vote falls into one, the 2/3 threshold understates the requirement. Pull the master deed's amendment-procedure clause before relying on the 2/3 floor.

NO STATUTORY RESALE-DISCLOSURE REGIME EQUIVALENT TO UCIOA. Unlike Washington (RCW 64.34.425 / 64.90.640), Connecticut (CGS Sec. 47-270), and Colorado (CRS Sec. 38-33.3-316), Michigan has no statutory resale-certificate framework. The closest analog is MCL Sec. 559.192(3) which grants co-owners (including sellers) a 10-business-day right to access association records. Resale-package delivery is governed by REC purchase-agreement custom rather than statute. See the companion Michigan condo resale-disclosure calculator.

NO SUPER-PRIORITY UNDER MCL Sec. 559.208(1). While this calculator covers voting rather than lien collection, the no-super-priority structure of Michigan condo law is the most-distinctive feature of the Michigan Condominium Act overall. The association lien is subordinate to a prior first mortgage. See the companion Michigan condo assessment-lien calculator.

PROXIES MUST BE CURRENT. MCL Sec. 559.190(3) permits proxies but most Michigan condo bylaws limit validity to 11 months. Old proxies are invalid even if all other elements are met. For OF-TOTAL threshold votes (master deed amendment, bylaws amendment, termination), aggressive proxy campaigns are typically necessary to reach the threshold and proxy currency is critical.

What this calculator does NOT model

The calculator implements the Michigan condo QUORUM-AND-SUPERMAJORITY math. It does NOT:

• Distinguish between co-owner-count voting and percentage-of-value voting — the calculator treats all inputs as counts. For bylaws-amendment votes under MCL Sec. 559.190(2), convert co-owner counts to percentage-of-value totals before using the calculator.
• Model heightened-consent categories under master deeds (changes to percentages of value, common-element boundaries, unit additions or withdrawals) that may require higher thresholds or unanimous consent.
• Validate the form of proxies (signature, date, expiration, delegation chain).
• Model special-meeting notice procedures or reduced-quorum reconvened-meeting procedures specified in the bylaws.
• Address bankruptcy treatment of voting rights for co-owners in bankruptcy.
• Cover voting under non-condominium HOAs in Michigan, which are governed by general corporate law and recorded restrictive covenants rather than the Michigan Condominium Act.

For any consequential vote, retain Michigan counsel with condominium-governance experience to oversee the procedural compliance review and the master-deed and bylaws threshold analysis.

Sources

Last reviewed: 2026-05-16 against:

• Michigan Condominium Act, MCL Sec. 559.101 through MCL Sec. 559.276.
• MCL Sec. 559.151 — master deed amendment 2/3 of votes default.
• MCL Sec. 559.190(1) — co-owner voting rights and bylaw-set quorum.
• MCL Sec. 559.190(2) — bylaws amendment 66 2/3% of value default.
• MCL Sec. 559.190(3) — proxy authorization.
• MCL Sec. 559.222 — termination 80% of votes default.
• MCL Sec. 559.231 — director removal subject to bylaw threshold.
• MCL Sec. 559.192(3) — association records access right.
• State Bar of Michigan Real Property Law Section practitioner materials on co-owner voting procedure.
• Michigan Community Association Institute (CAI) chapter governance guidance.