HVAC Permit Cost in Austin, TX (2026)
Residential HVAC change-out permit fees for the City of Austin, Texas (Travis County), pulled directly from the Development Services Department FY 2025-26 Residential Fee Schedule (effective October 1, 2025, updated November 13, 2025 - current). When you replace an existing furnace, air conditioner, or heat pump, Austin charges a Residential Change-Out HVAC permit of $67.32 for the first system and $18.81 for each additional system on the same permit. Texas has no statewide levy, so the change-out fee is the whole city permit.
This guide covers: The City of Austin residential HVAC change-out permit as published on the Development Services FY 2025-26 Residential Fee Schedule - a Residential Change-Out HVAC permit of $67.32 for the first system, plus $18.81 for each additional system on the same permit. This is the permit you pull when a contractor replaces an existing furnace, air conditioner, or heat pump.
New construction is different: for a brand-new home, the mechanical work is billed inside Austin's per-square-foot trade lines (the mechanical trade base starts at $116.07 for a home up to 1,000 sq ft), not as a change-out. This guide is about replacing existing equipment, not new-home mechanical.
This guide does NOT cover: the equipment and labor cost of the HVAC system, new ductwork or a system added where none existed (which can be priced differently), a full new-construction mechanical permit, an electrical service or panel upgrade needed for the new unit, or gas-line work. These are separate and are not part of the change-out permit fee.
A residential HVAC change-out permit in Austin, TX is $67.32 for the first system and $18.81 for each additional system on the same permit, on the FY 2025-26 Development Services Residential Fee Schedule. Replacing two systems is about $86.13. Texas adds no state levy, so the change-out fee is the whole city permit. New-construction mechanical is billed differently. Confirm current fees with Austin Development Services at 512-978-4000 before filing.
- Austin's Residential Change-Out HVAC permit is $67.32 for the first system - the fee you pull to replace an existing furnace, AC, or heat pump.
- Each additional system on the same permit is $18.81, so a two-system change-out is about $86.13.
- The change-out fee does not scale with the size or tonnage of the equipment - it is a flat per-system line.
- These figures are CURRENT - the FY 2025-26 Residential Fee Schedule is effective October 1, 2025 (updated November 13, 2025) - so there is no source-age caveat on this page.
- New-construction mechanical is billed inside Austin's per-square-foot trade lines (mechanical base $116.07 up to 1,000 sq ft), not as a change-out - this guide is about replacing existing equipment.
- Texas has no statewide percentage permit levy - unlike Virginia's 2% USBC surcharge. A 2.35% card service fee ($2 minimum) applies only if you pay by card through the AB+C portal.
Austin HVAC Change-Out Permit Fee Structure
The residential HVAC change-out permit is a flat per-system fee, with a lower rate for each additional system on the same permit. New-construction mechanical uses a different, per-square-foot line. There is no statewide levy. All figures are from the Development Services FY 2025-26 Residential Fee Schedule (effective October 1, 2025, updated November 13, 2025, current).
| Item | Fee | How It Is Calculated |
|---|---|---|
| Residential change-out HVAC (first system) | $67.32 | Flat per-permit fee to replace one existing system; not tiered by tonnage. |
| Each additional system (same permit) | $18.81 | Added per extra system replaced on the same change-out permit. |
| Two-system change-out | $86.13 | $67.32 first system + $18.81 second system. |
| New-construction mechanical (context) | from $116.07 | Per-square-foot mechanical trade base for a new home up to 1,000 sq ft - not a change-out. |
| State percentage levy | None | Texas has no statewide permit levy. |
Source: City of Austin Development Services FY 2025-26 Residential Building Plan Review & Inspection Permit Fees (effective October 1, 2025, updated November 13, 2025). The $67.32 first-system change-out fee and the $18.81 additional-system fee are exact on the schedule. The $116.07 mechanical trade base is shown for context (new construction), not the change-out path. A gas-line or electrical upgrade, if needed, is a separate permit.
Worked Examples - Real HVAC Change-Outs in Austin
The examples below use the exact schedule lines: the $67.32 first-system change-out fee and the $18.81 additional-system fee. The permit does not scale with tonnage.
A homeowner replaces the existing furnace and matching AC as one system.
- Residential change-out HVAC (first system): $67.32
- Additional systems: $0.00
- Total permit cost: $67.32
A standard one-system change-out is the flat $67.32 permit, with no state levy on top.
A larger home replaces two separate HVAC systems at the same time on one permit.
- First system: $67.32
- Second system: $18.81
- Total permit cost: $86.13
Each extra system on the same permit adds $18.81, so a two-system change-out is $86.13.
A new heat pump requires an electrical service or panel upgrade, filed separately.
- HVAC change-out (first system): $67.32
- Separate electrical upgrade permit: department-priced
- The change-out is $67.32; the upgrade is a separate line
An electrical service or panel upgrade needed for the new unit is its own permit and is not part of the mechanical change-out fee.
When This Estimate May Not Apply
The $67.32 first-system change-out fee comes from Austin's current FY 2025-26 schedule. Route your project to Development Services before relying on a figure if any of the following applies:
- This is new construction, not a change-out. New-home mechanical is billed inside the per-square-foot trade lines (mechanical base $116.07 up to 1,000 sq ft), not as a change-out.
- You are adding a system where none existed. A new system (not a like-for-like replacement) or new ductwork can be priced differently from a change-out.
- An electrical service or panel upgrade is needed. That is a separate electrical permit for the new unit.
- Gas-line work is involved. Gas piping for a new furnace can be a separate plumbing/gas permit.
- The work is commercial or multi-family. Non-single-family mechanical follows different lines.
- You are replacing more than one system. Each additional system on the same permit adds $18.81.
New construction, a newly added system, electrical upgrades, gas-line work, non-residential scope, and multi-system counts are all excluded from or may change the change-out figures on this page, and the page-standard disclaimer applies - always verify with Austin Development Services before budgeting.
Austin HVAC Permit Cost vs Other Verified Areas
A residential HVAC replacement permit is a modest flat fee in most places, but the amount varies by jurisdiction and whether a state levy applies. The table below compares Austin's change-out fee against other verified areas. Each figure is the residential HVAC/mechanical replacement permit as that jurisdiction charges it.
| Jurisdiction | HVAC Fee Basis | HVAC Permit |
|---|---|---|
| Washington, DC | Flat (Class E, to 10 tons) | $50.60 |
| Austin, TX | Flat change-out (first system) | $67.32 |
| Conroe, TX | $75 base + $25 change-out | $100.00 |
| Fairfax County, VA | $135 + 2% VA levy | $137.70 |
Scope note: Austin's $67.32 HVAC change-out is low among verified areas - just above Washington, DC's $50.60, below Conroe's $100 all-in, and well below Fairfax County, VA's $137.70 (which carries Virginia's 2% state levy). Texas adds no statewide levy, so Austin's change-out fee is the whole city permit. Austin's schedule is current (FY 2025-26).
See Austin's full residential fee schedule, or compare another Austin project type.
Frequently Asked Questions
Who to Contact
| Department | City of Austin - Development Services Department (DSD) |
| Phone | 512-978-4000 (or Austin 3-1-1) |
| Location | Permitting and Development Center, 6310 Wilhelmina Delco Drive, Austin, TX 78752 (Travis County) |
| Fee schedule | Austin Development Services Fees (FY 2025-26) |
Sources
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City of Austin - Development Services Department Fees (FY 2025-26 Residential) City of Austin official residential fee schedule (extracted June 10, 2026). Primary source for the $67.32 Residential Change-Out HVAC first-system fee, the $18.81 additional-system fee, and the $116.07 new-construction mechanical trade base (context). Footer reads "Updated: 11/13/2025 - Effective: 10/01/2025" (FY 2025-26, current).
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Texas Local Government Code, Chapter 214 Texas statute (.gov) confirming municipal building-regulation authority and that Texas imposes no statewide percentage building-permit levy. Context for the "no statewide levy" statement. Verified September 2026.