A friend in a 90-unit Denver condo got a $14,200 quote to replace a single-zone heat pump in his unit. The HOA's "approved" vendor was the only one allowed to pull a permit per the building's bylaws. The same job, by an outside vendor with the same equipment, would have been $7,800 in his market. The price difference was not labor, and it was not parts. It was the relationship between the vendor and the property manager.

This is the quietest line item in condo ownership. Most condo owners do not realize their building has an approved-vendor list, do not realize the markup, and do not realize they can usually get a variance. Across the country, the pattern is consistent. The Condo Trap documents seven financial forces destroying condo values; HOA-mandated mechanical work is a piece of force three (the special assessment crisis) and force seven (utility cost inflation), because in-unit equipment that gets overcharged once tends to get overcharged every cycle.

This post is the framework I use to fix this for condo unit owners. The same six lookups and 11-point scorecard from any HVAC vetting work, plus three condo-specific moves the board does not advertise.

What a condo HVAC system actually looks like

Before you can vet a contractor you need to know what is actually in your unit and what is shared. Condos vary widely:

In-unit forced air with shared rooftop condenser: The condenser belongs to the HOA. The air handler, ductwork, and thermostat are yours. Most modern garden-style condos.
In-unit packaged terminal AC (PTAC) or window units: Entirely yours. Common in older mid-rise buildings.
Mini-split heads off a building VRF system: The VRF (variable refrigerant flow) infrastructure is HOA-owned. The head and the connection are usually yours, but the work cuts into the shared loop. Permits and contractor approval matter most here.
Hydronic / fan-coil units off a building chiller-boiler loop: The boiler, chiller, and main loop are HOA. The fan-coil unit and its valves are usually yours.
All-HOA central plant (older high-rise): You have a thermostat. Everything else is the HOA. Repairs are an assessment.

The first job before calling anyone is to read the master deed and the bylaws to find which line items are unit-owned versus building-owned. The vendor list applies differently to each.

Why approved-vendor lists are usually expensive

Approved-vendor lists exist for legitimate reasons. The board wants insurance certificates on file, wants someone the property manager can call after hours, and wants the same vendor across multiple buildings for institutional knowledge.

They also exist for less legitimate reasons. Property management companies often have referral relationships with vendors. The vendor pays the manager directly, or the management company collects a "back-of-house fee," or the vendor offers free common-area work in exchange for being the only name on the list. Unit owners pay the markup.

You can usually verify this. Look for these signs:

The vendor is the same across the property manager's other buildings, not just yours
The vendor's quotes for in-unit work consistently come in at the high end of regional ranges
The vendor's BBB profile or BuildZoom record shows complaints from the same building or neighborhood
The board has rejected variance requests with no documented criteria

The six lookups that vet any HVAC company (condo edition)

1. State or local contractor license

Same kill-switch check that applies anywhere. Verify the active license at:

Colorado: dpo.colorado.gov
California: cslb.ca.gov
Texas: tdlr.texas.gov
Florida: myfloridalicense.com
Arizona: roc.az.gov
Anywhere else: search "[STATE] HVAC contractor license lookup"

For condos specifically, also check whether the contractor is licensed for multi-family work in your jurisdiction. Some states (Florida especially) have separate endorsements for residential single-family vs multi-family.

2. BuildZoom permit history

Search buildzoom.com [company name] [city] and pull:

BuildZoom score (95+ recommended)
Permits in the last 36 months
Whether the permits include multi-family addresses (a contractor that only does single-family detached may not understand condo party-wall constraints)

A red flag specific to condo work: a contractor that pulls permits at the building address but no permits in the wider city. That is a captive vendor, not a general-market vendor.

3. BBB profile, but read the complaints

Specific patterns to scan for in condo work:

Complaints from other unit owners in the same building
"Damaged common-area finishes" reports (drywall, hallway carpet, elevator pads)
Disputes about who paid for what when the work crossed the unit-HOA boundary
Quotes well above regional ranges (water heater installs over $8,000, in-unit furnace replacements over $9,000 for standard residential)

4. Cross-platform review consistency

Same as any vetting. 4.3 to 4.8 across Google, Yelp, Angi, HomeAdvisor, Nextdoor. Reddit local subs ("reddit [your city] HVAC condo work") often surface building-specific complaints that other platforms scrub.

5. Manufacturer and technician credentials

Condo-relevant verifications:

NATE certification at natex.org for the technician doing the work
EPA 608 for refrigerant handling (legally required, especially for VRF and split systems)
Manufacturer factory-authorized status for the specific brand of HOA equipment if you are working on a connected unit (Trane Comfort Specialist, Carrier Factory Authorized Dealer, Lennox Premier Dealer, Mitsubishi Diamond Contractor for VRF, Daikin Comfort Pro)
Multi-family install experience demonstrated through BuildZoom permits or a referenceable building list

6. Business model: red flags vs green flags

Same red flags (sales reps separate from techs, commission-based pay, same-day pressure, recent PE acquisition).

Condo-specific green flags:

Has worked in your specific building before, with referenceable unit owners
Familiar with condominium insurance requirements (most HOAs require $2M general liability)
Pulls a permit when the work requires one, which it almost always does in a condo
Will provide a certificate of insurance naming the HOA as additional insured before work begins

The 11-point scorecard

#	Criterion	Points	What earns full points
1	State or local license active	15	Active, valid for multi-family in your jurisdiction. Pass/fail.
2	Pulls permits consistently	15	Verified through BuildZoom or city records.
3	BBB complaint pattern (last 24 months)	15	No predatory pricing or common-area damage complaints.
4	Cross-platform review consistency	10	Within 0.5 stars across Google, Yelp, Angi, HomeAdvisor.
5	BuildZoom score	10	95 or above.
6	Volume in healthy range	10	30 to 300 permits over 3 years, with multi-family present.
7	NATE / manufacturer / multi-family certs	5	Verified at natex.org or manufacturer locator, plus multi-family experience.
8	Years in business	5	5+ years under continuous ownership.
9	Pricing transparency policy	5	Itemized written quotes. No commission-based techs.
10	Owner accessibility	5	Owner answers calls or does estimates.
11	Permit value fits typical job range	5	Recent permit dollar amounts match a fair install.
	Total	100

Score interpretation:

85 to 100: Hire with confidence (and ask the HOA for a variance if needed).
70 to 84: Solid. Get a second quote anyway.
55 to 69: Use only for small jobs. Never authorize a replacement on the first visit.
Under 55: Avoid.

How to ask the HOA for a variance

This is the move most condo owners do not know they have. Most CC&Rs and bylaws allow the board to approve outside contractors on a case-by-case basis as long as the contractor meets the same insurance, license, and permit requirements as the approved-vendor list.

The request, in writing to the property manager and copied to the board:

I am requesting board approval to use [Contractor Name], license #[STATE-LICENSE-NUMBER], for [scope of work] in unit [###]. The contractor will provide a $2M general liability certificate naming the HOA as additional insured prior to start, will pull all required permits with the city, and will complete the work to the same standard required of approved vendors. Three competing quotes are attached for the board's reference.

Include:

The three quotes, including the approved vendor's quote
The contractor's license verification (a screenshot from the state database is enough)
The contractor's certificate of insurance, naming the HOA as additional insured
Recent permit history from BuildZoom for the same type of work
The 11-point scorecard filled out for your top choice

A reasonable board will approve. An unreasonable board may not. Either way the paperwork creates a record.

Where this fits in the bigger condo cost picture

The Condo Trap documents seven financial forces compounding against condo values. Approved-vendor markup is not on that list explicitly because it is upstream of the seven, but it shows up everywhere they do.

Force 2 (Special Assessment Crisis): The special-assessment vendor for the building chiller, the boiler retrofit, the parking garage scope, all run through the same approved list. Markup compounds at the assessment level and there is no individual-owner variance path for shared mechanicals.
Force 3 (Insurance Crisis): Some carriers require approved-vendor work for warranty validity. That gives the management company more leverage, not less.
Force 7 (Utility Cost Inflation): Older mechanical systems retrofitted by approved-only vendors at marked-up labor stay older longer because the cost of a real upgrade exceeds reasonable owner spend.

Knowing how to vet a vendor and how to ask for a variance is the highest-impact move a unit owner can make on the in-unit side.

For broader market math, HomeStats publishes the Buy-vs-Rent ratio, value-to-rent, price-to-income, and Paycheck Reality breakdown for every U.S. state, county, metro, and ZIP, with primary-source citations. If your building's HVAC math is making the unit unaffordable to hold, the wider market data tells you whether the unit itself still pencils.

Condo HVAC: The Approved-Vendor Trap and How to Vet Around It