Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Most HVAC work in Temple City requires a mechanical permit from the City Building Department. Replacement of existing units in existing locations may qualify for a simplified streamlined permit, but new installations, ductwork changes, and refrigerant line work almost always need one.
Temple City enforces California Title 24 energy code and the California Building Code (which incorporates the International Mechanical Code) — but the city's critical distinction is its mandatory online permitting portal and same-day or next-day counter review for HVAC replacements, which can compress timelines compared to neighboring San Gabriel or Rosemead. Unlike some LA County jurisdictions that allow owner-builder HVAC work if you hold a C-20 (HVAC contractor) license, Temple City requires a licensed C-20 contractor for ALL new refrigerant installations and ductwork modifications — owner-builder exemption under B&P Code § 7044 does not extend to mechanical trades. However, a licensed C-20 contractor can pull the permit on your behalf and often includes permit costs in the bid. The city's permit fee is typically 0.8–1.2% of the declared equipment valuation (e.g., $80–$150 for a $10,000 system replacement), plus any plan-review fees if ductwork or load calculations are involved. Temple City's building department has adopted the 2022 California Building Code, so Title 24 compliance (including variable refrigerant flow systems, SEER2 minimums, and ductwork sealing) is mandatory and will be inspected.

What happens if you skip the permit (and you needed one)

Temple City HVAC permits — the key details

Temple City's Building Department enforces the 2022 California Building Code and California Title 24 mechanical energy standards. Any installation or modification of a heating, ventilation, air conditioning, or refrigeration system requires a mechanical permit unless it falls into a narrow exemption (e.g., replacement of an exact model in the exact location with no ductwork or electrical changes). The city's definition of 'replacement' is strict: same capacity (tonnage), same indoor/outdoor unit locations, same ductwork, no new electrical circuits. Even a one-ton upgrade or a shift from a wall-mounted unit to a ceiling cassette will trigger a full mechanical permit. The application requires the contractor's C-20 license number, the equipment's model number and capacity (SEER2 or AHRI certificate), the building's address, and a basic scope diagram. Most contractors submit this online through Temple City's permit portal and get initial review feedback within 24 hours; plan-review fees (if required) are typically $50–$150 and are added to the permit fee.

California Title 24 (2022) imposes strict minimum efficiency standards that override older local rules. All air conditioners and heat pumps must meet SEER2 minimums: 13 SEER2 for cooling-only systems in Climate Zone 6 (which includes parts of Temple City), and 15 SEER2 for heat pumps in heating-dominated zones. The code also mandates ductwork sealing and testing (ASTM E1554 Method A) for any ductwork change or new system installation — the contractor must submit a blower-door and duct-leakage test report (≤15% leakage allowed) as part of permit closeout. Failure to meet these minimums can result in the permit being rejected at plan review, delaying your project by 1–2 weeks while the contractor sourcing a compliant unit. Temple City's building inspector will verify SEER2 ratings against the AHRI directory during the rough inspection and will not approve the final unless ductwork testing is documented.

Owner-builder restrictions are important to understand. Under California B&P Code § 7044, a homeowner can pull permits for their own residential property and perform work themselves — but ONLY for trades that do not require a state license. HVAC (mechanical) work requires a C-20 contractor license; therefore, you cannot legally pull an HVAC permit yourself and do the work with an unlicensed friend or family member. You must hire a licensed C-20 contractor to pull the permit and perform the installation. Some contractors will permit you to be present during work and inspections (e.g., you can help run refrigerant lines under supervision), but the contractor is responsible for all code compliance and inspection sign-off. If you attempt unpermitted owner-builder HVAC work, you expose yourself to stop-work fines and insurance denial.

Electrical considerations add complexity. Most HVAC systems require a new or modified electrical circuit: a 240-V, 30–60-amp circuit for a central air conditioner or heat pump, or a 120-V circuit for a small window unit or mini-split indoor head. The C-20 contractor typically coordinates with a licensed electrician (C-10) to pull a separate electrical permit and run the circuit. Temple City's building department will not approve the HVAC permit final inspection without an electrical final signed off (if electrical work was involved). The total cost for HVAC + electrical permits is typically $200–$400, plus the cost of the circuit installation ($500–$1,500 depending on distance from the panel). Some contractors bundle all permitting costs into their bid; others itemize them separately.

Inspection timeline in Temple City is typically 1–2 weeks from permit issuance to final approval. The rough inspection (before drywall closure or ductwork insulation) checks refrigerant line quality, electrical connections, ductwork sealing, and blower-door test results. The final inspection verifies equipment operation, thermostat function, and ductwork access panels. If the inspector finds code violations (e.g., undersized breaker, improperly sealed ductwork), you'll be issued a correction notice and must reschedule the final inspection after repair. Plan for an extra week if corrections are needed. Once both inspections pass, the building department issues a Mechanical Installation Permit Final that confirms the work meets code and is insurable.

Three Temple City hvac scenarios

Scenario A
Straight replacement of a 25-year-old window air conditioner with a new 12,000-BTU cooling-only unit, same window opening, same electrical circuit
A window air conditioner replacement in Temple City is one of the few HVAC jobs that can skirt the permit requirement — but only if you replace it with the exact same capacity (or lower) and do NOT upgrade the electrical circuit. In this scenario, the 12,000-BTU existing unit is being swapped for a new 12,000-BTU unit, which requires no ductwork modification, no additional refrigerant line work, and no new circuit. The electrician simply unplugs the old unit and plugs the new one into the same 120-V outlet. This work does not require a mechanical permit under California Building Code § 312.1 (appliance replacement exemption). However, if the homeowner wants to upgrade to a 15,000-BTU unit (more cooling capacity), the job now requires a mechanical permit because the electrical circuit may be undersized, and Title 24 compliance must be verified. Temple City's building department does not require permit pull for the no-upgrade case, and the window AC manufacturer's installation instructions are sufficient documentation. Total cost: $400–$800 for the unit and installation, $0 in permit fees. Installation takes 1–2 hours.
Window AC replacement (same capacity) | No permit required | 120-V existing outlet | Unit cost $400–$600 | Installation $200–$300 | Total project $600–$900 | No inspection required
Scenario B
New central air conditioning system (3-ton split unit): outdoor condenser pad, 40 feet of refrigerant line, new 240-V 60-amp circuit, ductwork extension to new master bedroom
This is a complex HVAC job that triggers multiple permits and code requirements in Temple City. The homeowner is adding cooling to a previously uncooled home and extending the ductwork system — both require a full mechanical permit. The C-20 contractor will submit an application including the AHRI certification showing the 3-ton unit meets Title 24 SEER2 minimums (typically 13–15 SEER2 depending on climate zone), a one-line diagram showing the refrigerant line routing and electrical connections, and the ductwork extension scope. Temple City's building department will also require a Title 24 compliance checklist and a ductwork sealing plan. An electrical permit will be pulled separately for the 240-V 60-amp circuit (cost: $100–$150). The rough inspection verifies refrigerant-line quality, braze joints, electrical connections, and ductwork layout. The final inspection includes blower-door testing and ductwork leakage testing (≤15% ASTM E1554 Method A). If the ductwork fails the leakage test, the contractor must seal additional joints or re-tape seams and retest. Total permit cost: $200–$300 (mechanical) + $120–$150 (electrical) = $320–$450. Timeline: 3–4 weeks from permit issuance to final approval, assuming no correction notices. Installation labor: 2–3 days. Equipment cost (3-ton unit + ductwork + electrical): $6,500–$9,000. This job MUST be done by a licensed C-20 contractor; owner-builder exemption does not apply.
New 3-ton central AC system | Mechanical permit required | 240-V 60-amp circuit required | Title 24 SEER2 compliance required | Ductwork sealing + blower test required | Permit cost $320–$450 | Equipment + labor $6,500–$9,000 | Timeline 3–4 weeks | C-20 contractor required
Scenario C
Mini-split heat pump upgrade (two 12,000-BTU heads, 25 feet of refrigerant line, existing 120-V outlet, no ductwork)
A ductless mini-split heat pump is a growing popular choice in Temple City because it avoids ductwork installation and allows zone control. However, it still requires a mechanical permit because any new refrigerant installation, regardless of ductwork, must be permitted and inspected under California Building Code Chapter 12 (Mechanical Systems). The contractor will submit an AHRI-certified equipment schedule showing the two heads and outdoor unit (total capacity ~24,000 BTU, typically 15 SEER2 or higher for heat pump mode), a refrigerant-line routing diagram, and an electrical load calculation. If the system draws more than 120 amps at 120 V (unlikely for a mini-split), a new 240-V circuit may be required; if it fits on the existing 120-V outlet, no additional electrical permit is needed. Temple City's building department will review the plan within 24 hours and issue a mechanical permit (cost: $100–$150). The rough inspection checks refrigerant line brazing, electrical connections, and indoor head mounting (vibration isolation, condensate drain slope). The final inspection verifies system operation, thermostat response, and refrigerant charge. No ductwork testing is required because the system is ductless, which accelerates approval. Timeline: 1–2 weeks from permit to final approval. Total cost: permit $100–$150 + equipment + labor ($3,500–$5,500). This job must be performed by a C-20 contractor; the mini-split installer will pull the permit and coordinate any electrical needs.
Ductless mini-split heat pump (two heads) | Mechanical permit required | 120-V existing outlet likely sufficient | No ductwork testing required | AHRI certification required | Permit cost $100–$150 | Equipment + labor $3,500–$5,500 | Timeline 1–2 weeks | C-20 contractor required

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Title 24 compliance and ductwork sealing in Temple City

California Title 24 (2022) is the state's energy code and supersedes any local Temple City ordinance that conflicts with it. For HVAC systems, Title 24 mandates minimum SEER2 ratings (cooling efficiency) and HSPF2 ratings (heating efficiency if a heat pump) that vary by climate zone. Temple City straddles two zones: parts of the city fall in Climate Zone 6 (cooling-dominated), and parts in Zone 3 (mixed). The building department's permit application includes a checkbox for climate zone; if you're unsure, the contractor will confirm based on your ZIP code. Minimum SEER2 for cooling-only systems in Zone 6 is 13; for heat pumps, HSPF2 must be ≥8.5. Undersized equipment will fail plan review.

Ductwork sealing and testing is mandatory for any new or modified ductwork and is one of Temple City's strictest inspections. The contractor must submit an ASTM E1554 Method A blower-door ductwork leakage test report showing ≤15% total ductwork leakage. If ductwork leakage exceeds 15%, the system cannot pass final inspection. Common causes of leakage: poorly sealed flex-duct connections, gaps at ductwork registers, or missing ductwork insulation thermal breaks. Sealing ductwork properly requires high-quality mastic tape, duct sealant, and time; it can add $300–$500 to the project cost. Temple City's inspectors will spot-check ductwork joints visually during the rough inspection and will require the test report before issuing the final.

Thermostats and controls also fall under Title 24 compliance. All new HVAC systems must have a programmable or smart thermostat that meets Title 24 Section 150.1 (setpoint limiting, manual override capability, etc.). A basic programmable thermostat adds $150–$300 to the equipment cost; a smart/WiFi thermostat adds $200–$500 but allows remote control and energy tracking. The permit application will ask for the thermostat model; if it doesn't meet Title 24, the building department will request a substitute before approval.

Temple City's online permit portal and contractor licensing

Temple City's Building Department uses an online permit portal that allows contractors to submit HVAC permits 24/7 and receive initial review feedback within 24 hours (or next business day). The portal requires the contractor to upload scanned copies of their C-20 California contractor license (active and in good standing), the equipment's AHRI certificate or spec sheet, and a basic scope-of-work document (sketch or description). Once submitted, the system assigns a permit number and inspection appointment window. This streamlined process is faster than older in-person-only jurisdictions (e.g., parts of Pasadena or Arcadia that still require physical paperwork delivery) and can compress the timeline from permit-to-final by 1–2 weeks.

C-20 contractor licensing is California state-mandated and non-negotiable in Temple City. A C-20 license is issued by the California Department of Consumer Affairs (Contractors State License Board) and requires proof of experience, bonding, workers' compensation insurance, and a passing score on the C-20 exam. Before hiring a contractor, verify their license at https://www.cslb.ca.gov/. A contractor's license number is required on the permit application, and the building department will verify it against the state database during plan review. If the contractor's license is expired, suspended, or restricted, Temple City will not issue the permit until a compliant contractor is assigned. Some homeowners ask if they can hire an unlicensed friend to do the work and pull a permit themselves; the answer is no — B&P Code § 7044 owner-builder exemption does not extend to mechanical trades.

Permit fees in Temple City are typically calculated as 0.8–1.2% of the equipment valuation declared on the application, plus plan-review fees if ductwork modification or load calculations are involved. For a $10,000 system (equipment only), the permit fee is roughly $80–$120. If the contractor undervalues the equipment to reduce permit fees, the building department can request receipts or quotes and adjust the fee. Plan-review fees (if applicable) are usually $50–$150 and are added on top of the permit fee. The total permitting cost for a typical residential HVAC job (replacement or new installation) is $150–$400, which is a fraction of the equipment and installation cost but is non-negotiable.

City of Temple City Building Department
Temple City City Hall, 9701 Las Tunas Drive, Temple City, CA 91780
Phone: (626) 285-2171 | https://www.templecityca.gov/departments/planning-building-services
Monday–Friday, 8:00 AM – 5:00 PM (confirm by phone or website)

Common questions

Can I pull an HVAC permit myself as the property owner in Temple City?

No. California B&P Code § 7044 allows owner-builders to pull permits for their own residential property, but only for non-licensed trades. HVAC (mechanical) work requires a state-licensed C-20 contractor. You cannot legally pull a mechanical permit yourself and perform the work with an unlicensed installer. You must hire a C-20 contractor to pull the permit and perform the installation. The contractor will include permitting costs in their bid or itemize them separately.

What is SEER2 and why does it matter for Temple City permits?

SEER2 (Seasonal Energy Efficiency Ratio 2) is California's current cooling-efficiency standard, adopted in the 2022 Building Code. All air conditioners and heat pumps installed in Temple City must meet Title 24 SEER2 minimums (typically 13–15 SEER2 depending on climate zone). Older SEER ratings are no longer acceptable. The building department will verify SEER2 on the equipment's AHRI certificate during plan review; if the equipment doesn't meet the minimum, the permit will be rejected and you'll need to source a compliant unit.

Do I need an electrical permit for my new HVAC system in Temple City?

Most likely yes. Central air conditioners and heat pumps require a new or modified 240-V electrical circuit, which requires a separate electrical permit pulled by a licensed C-10 electrician. Temple City's building department will not approve the HVAC final inspection without an electrical final sign-off if electrical work was involved. Window units and mini-splits may be able to use existing 120-V outlets if they're properly sized, avoiding the electrical permit — but the C-20 contractor will confirm this during design.

What is ductwork sealing testing and why is it required in Temple City?

Ductwork sealing testing (ASTM E1554 Method A) measures how much conditioned air leaks from the ductwork before reaching the living spaces. California Title 24 limits ductwork leakage to 15% of total airflow. Temple City's building department requires the contractor to submit a blower-door ductwork test report showing compliance before the final inspection is approved. If leakage exceeds 15%, the contractor must seal additional joints and retest. This adds cost ($300–$500) but ensures energy efficiency and code compliance.

How long does the HVAC permit process take in Temple City?

Typically 1–4 weeks from application to final approval, depending on complexity. Window AC replacements (no permit required) take hours to install. Ductless mini-splits (mechanical permit, no ductwork) take 1–2 weeks. New central systems with ductwork modification take 3–4 weeks due to plan review and ductwork testing. Temple City's online portal provides 24-hour initial review feedback, accelerating the timeline compared to older in-person-only jurisdictions.

What happens if I do unpermitted HVAC work in Temple City and the city finds out?

The city can issue a stop-work order and fine you $500–$1,000 per day of unpermitted work. Insurance may deny coverage for unpermitted work, leaving you liable for damage. If you sell the home, you must disclose unpermitted work on the Seller's Property Condition Disclosure (California Civil Code § 1102), which can kill the sale or trigger a price reduction. The safest approach is to permit all HVAC work upfront; the cost is modest compared to the risk.

Do I need a permit to replace my existing furnace with an identical new furnace in Temple City?

It depends on whether you're modifying the ductwork or electrical circuit. If you're replacing the furnace with an identical or lower-capacity model in the exact same location, using the same ductwork and electrical circuit, you may not need a permit (California Building Code § 312.1 appliance replacement exemption). However, if you're upgrading capacity, adding a new circuit, or modifying ductwork, a mechanical permit is required. A licensed contractor can determine this during the assessment. When in doubt, pull the permit; the cost is low and the insurance/resale implications of unpermitted work are severe.

Can a contractor pull the HVAC permit on my behalf in Temple City?

Yes. Most C-20 contractors routinely pull mechanical permits on behalf of homeowners using Temple City's online portal. The contractor submits their license number, equipment specs, and scope diagram, and the building department issues the permit to the contractor as the applicant. You will be named as the property owner and responsible party on the permit. The contractor will schedule and attend inspections on your behalf. Permitting costs ($100–$300) are typically itemized in the bid or included as part of the total project cost.

Are there any HVAC projects that don't require a permit in Temple City?

Very few. Window air conditioner replacements of identical or lower capacity (no ductwork or circuit changes) do not require a permit. Some minor thermostat replacements or filter changes do not require permits. Any new refrigerant line work, ductwork modification, capacity upgrade, or electrical circuit change requires a mechanical permit. When in doubt, check with Temple City's Building Department or ask the contractor; it's better to confirm upfront than to face a stop-work order or insurance denial later.

What is the difference between a C-20 (HVAC) and C-10 (electrical) license, and why do I need both?

A C-20 license is for mechanical contractors who install and service HVAC and refrigeration systems. A C-10 license is for electrical contractors who install wiring, circuits, and panels. Most new HVAC systems require both trades: the C-20 contractor handles the HVAC unit, refrigerant lines, and ductwork; the C-10 electrician handles the new 240-V circuit and breaker. Temple City requires separate permits for each trade, and both inspections must pass before the system is approved. Some contractors partner with electricians and coordinate permits as a package; others recommend hiring an electrician separately.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current hvac permit requirements with the City of Temple City Building Department before starting your project.

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