HVAC Permits & Licenses in Ann Arbor, MI

Proof of coverage must be filed annually. Self-insurance possible for larger firms.

Register via MTO or UIA Employer Access Registration. Quarterly wage/tax reporting required.

Required for all LLC formation. Annual statement also required (see separate entry).

Applies to all LLCs. Online filing preferred.

Certificate of Assumed Name; valid indefinitely unless withdrawn or changed.

A $10,000 surety bond is required for Mechanical Contractor licensing under Part 73 of the Construction Code Act (PA 230 of 1980). The bond ensures compliance with state codes and regulations. Bond must be issued by a surety licensed in Michigan. Not required for jobs under $600 in value.

Not legally required by Michigan state law for HVAC contractors. However, it is strongly recommended to cover claims of negligence, faulty workmanship, or design errors. Not required for licensing but may be requested by clients for larger projects.

Not mandated by Michigan law. However, if the HVAC business sells or installs equipment (e.g., furnaces, air conditioners), it may be considered part of the distribution chain and potentially liable for defects. Coverage typically included in general liability or extended via product liability endorsement.

Not required for standard HVAC operations. Only applicable if the business hosts events where alcohol is served (e.g., open houses, trade shows). In such cases, a liquor liability endorsement or host liquor liability policy may be necessary. Not enforced by state for HVAC businesses without alcohol service.

Required for HVAC contracting (heating, ventilation, air conditioning). Must pass exam or qualify via experience. Applies to business entity.

Business must designate at least one qualifying agent (individual with passing exam score or equivalent experience). Multiple locations may require additional agents.

Michigan Treasury Online (MTO) registration. HVAC installation and parts sales subject to 6% sales tax.

Combined with sales tax registration via Michigan Treasury Online.

HVAC businesses must collect and remit sales tax on equipment, parts, and certain services involving installation or repair. Applies to tangible personal property sold or installed. Registration required even if only performing services with no parts sold, if parts are occasionally used. Effective immediately upon starting business operations.

Required for all employers in Michigan. HVAC business must withhold state income tax from employee wages. Registration includes assignment of a withholding tax account number. Must file Form 5000 (Withholding Tax Return) quarterly or monthly depending on liability.

Employers must register with UIA and pay quarterly unemployment insurance taxes (FUTA and SUTA equivalents). New employers typically pay 2.7% on first $9,500 of each employee's wages annually. Rate may change after experience rating is established.

Standard LLCs taxed as pass-through entities (default) are not subject to Michigan Corporate Income Tax. If the LLC files IRS Form 8832 or 2553 to be taxed as a corporation, it must file Form 4800 and pay 4.75% on Michigan-sourced income. Filing frequency: annual.

Not all Michigan cities impose a business tax. Examples: Detroit imposes a 1.5% City Business Tax on gross receipts; Grand Rapids has a similar tax. HVAC businesses must register locally if operating within such jurisdictions. Verify with city clerk or treasurer’s office. Registration often bundled with local business license.

Required for all LLCs, regardless of employee count. Used for federal income tax, employment tax, and excise tax filings. Apply online via IRS website. Not a tax itself, but prerequisite for tax compliance.

HVAC business must withhold federal income tax, Social Security, and Medicare taxes from employee wages. File Form 941 quarterly. File Form 940 annually for FUTA. Deposit taxes via EFTPS. EIN required.

If HVAC business purchases equipment, tools, or materials without paying Michigan sales tax (e.g., out-of-state purchases), it must self-assess and pay use tax at 6%. This is an ongoing compliance obligation, not a registration. Filed via Form 1040 or online system.

Required for all businesses; HVAC contractors must also hold state mechanical license. Verify zoning compliance prior to application.

Not required if operating solely within a municipality like Detroit that has its own licensing.

Zoning Verification Letter confirms property is zoned for HVAC business (e.g., industrial districts). Home-based operations may need Home Occupation Permit.

While not always required by state license, Michigan EGLE may require proof of pollution coverage for refrigerant handlers. EPA Section 608 certification applies; non-compliance can trigger liability. Often bundled with general liability or purchased separately.

Single-member LLCs with no employees may use the owner's SSN, but obtaining an EIN is recommended for liability protection and banking purposes. HVAC businesses often need EINs due to employee hiring and federal excise tax obligations related to refrigerants.

The Inflation Reduction Act imposes a phasedown of HFC refrigerants and a federal excise tax of $1,500 per metric ton of CO2 equivalent emissions on imported or produced HFCs. Contractors purchasing pre-charged equipment or refrigerant may be indirectly affected. See IRS Notice 2023-16 for guidance. Final rule effective October 3, 2022 (87 FR 60268).

Mandatory under Section 608 of the Clean Air Act. HVAC technicians must pass an EPA-approved exam (Type I, II, III, or Universal). Certification is individual, not business-wide. Employers must ensure all refrigerant-handling staff are certified. Certification cards must be carried on-site.

HVAC work involves hazards such as electrical safety (29 CFR 1910.303), fall protection (29 CFR 1926.501), confined space entry (29 CFR 1910.146), and trenching (for geothermal installations). Employers must provide training, safety equipment, and maintain injury logs (OSHA Form 300) if over 10 employees or in high-risk industries.

HVAC businesses must ensure physical locations (if any) and digital platforms (websites, online booking) are accessible to people with disabilities. Applies under Title III of the ADA. Includes communication with customers with hearing/speech impairments and accessible service calls.

Under the FTC’s Appliance Labeling Rule, HVAC contractors must ensure EnergyGuide labels remain affixed to new equipment until installation. Contractors must not remove or obscure labels. Applies to central air conditioners, heat pumps, and furnaces. Part of the Energy Policy and Conservation Act (EPCA).

HVAC businesses must comply with federal minimum wage ($7.25/hr), overtime pay (1.5x regular rate for hours over 40/week), and recordkeeping requirements. Independent contractor misclassification is a common issue in HVAC; DOL scrutinizes classification under economic reality test.

Mandatory for all HVAC businesses with employees. Form I-9 must be completed for every employee, regardless of citizenship. E-Verify is not required federally unless in a state with mandates (Michigan does not require it for most employers).

HVAC businesses meeting the employee threshold must provide eligible employees with up to 12 weeks of unpaid, job-protected leave for qualifying medical or family reasons. Notice posting and recordkeeping required.

HVAC businesses must use EPA-certified technicians, recover refrigerant using approved equipment, and send it to certified reclaimers. Prohibits intentional venting of ozone-depleting and HFC refrigerants under Section 608 of the Clean Air Act. Applies even if no repair is performed.

Must be filed online via the LARA Business Entity Search portal. The filing confirms the LLC’s continued existence.

Applies to any business performing HVAC installation, repair, or maintenance in Michigan. Must display the license at the primary place of business.

Technicians must retain proof of certification and make it available for inspection upon request.

Limited to low-impact activities; no heavy equipment storage or customer visits allowed per ordinance.

Mechanical alterations for HVAC work on customer properties also require permits.

Must comply with zoning district sign regulations.

Required for commercial spaces; hazardous materials (e.g., refrigerants) trigger additional reviews.

Issued after passing building, fire, and zoning inspections.

Required for monitored systems.

Many cities (e.g., Troy, Farmington Hills) have separate zoning depts; check specific municipality.

Required for all employers with one or more employees in Michigan under the Michigan Workers' Disability Compensation Act (MCL 418.1a). Sole proprietors without employees are exempt. HVAC business classified under NAICS 238220 (Other Specialty Trade Contractors), typically assigned classification code 5152. Coverage must be obtained through private insurer or the voluntary state fund (MESA).

Not mandated by Michigan state law for HVAC businesses. However, many municipalities, property owners, and general contractors require proof of general liability insurance as a condition of contracting. Strongly recommended for risk mitigation. Covers third-party bodily injury, property damage, and advertising injury.

Required under Michigan's No-Fault Act (MCL 500.3101–3102) for any vehicle operated on public roads. Minimum liability limits: $250,000 bodily injury per person, $500,000 per accident, $100,000 property damage. Applies to vans, trucks, or cars used for HVAC service calls. Personal auto policies do not cover business use.

Minimum of 2 hours of approved CE per year; courses must be documented and retained for 3 years.

LLCs taxed as partnerships file Form 1065 federally but must still file Form 518 for Michigan.

LLC taxed as partnership files Form 1065; if electing corporate tax treatment, file Form 1120.

Both federal and Michigan estimated taxes are due on the same dates.

Registration for sales tax is required before collecting tax.

Electronic filing via the Michigan UI portal is required.

Premiums are based on the employer’s total payroll and classification codes.

The 300A summary must be posted in a conspicuous place where employees can view it.

Both federal and state posters must be legible and posted in a prominent location.

Include copies of licenses, certifications, insurance policies, and CE documentation.

Inspections include rough‑in, pressure testing, and final inspection.

Maintain a copy of the fire clearance certificate on file.