Attic insulation in San Antonio
CPS Energy rebates attic insulation by the square foot: $0.35 when a contractor installs it and $0.25 if you do it yourself.1
Contractor-installed
$0.35 per sq ft.1
Self-installed
$0.25 per sq ft.1
Starting point
Existing insulation no greater than R-14 in attics with 24+ inches of clearance.1
CPS Energy's attic insulation rules
- Where: between an air-conditioned living area and an unconditioned attic. Garages and other non-living areas don't qualify.1
- Attics with more than 24 inches of clearance: finish at R-38 or more, starting from no more than R-14.1
- Low attics (under 24 inches): finish at R-19 or more, starting from no more than R-11.1
- Paperwork: an itemized, dated invoice showing starting and ending R-value, insulation type and square feet. Photos are required if existing insulation is under R-5 or it's a DIY job.1
- All insulation must be new, with the R-value printed on the packaging.1
Income-qualified: Casa Verde
CPS Energy's Casa Verde weatherization program serves income-qualified customers through registered trade allies, who do the assessment and the work.2
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San Antonio is in climate zone 2, where ENERGY STAR recommends R-49 for an uninsulated attic or adding R-38 over 3 to 4 inches.34 CPS's R-38 minimum for standard attics is the floor, not the ceiling.1
Choosing an insulation contractor in San Antonio
- Make sure the invoice lists starting and ending R-value, type and square feet; CPS requires all four.1
- Ask the contractor to photograph the attic floor with a ruler showing depth before they start.1
- Ask whether air sealing and attic ductwork are in the quote.6
Areas we serve
We match homeowners across the San Antonio area, including these communities and ZIP codes:
- San Antonio78023 · 78201 · 78202 · 78203 · 78204 · 78205 · 78207 · 78208 · 78209 · 78210 · 78211 · 78212 · 78213 · 78214 · 78215 · 78216 · 78217 · 78218 · 78219 · 78220 · 78221 · 78222 · 78223 · 78224 · 78225 · 78226 · 78227 · 78228 · 78229 · 78230 · 78231 · 78232 · 78233 · 78234 · 78235 · 78237 · 78238 · 78240 · 78242 · 78244 · 78247 · 78248 · 78249 · 78250 · 78251 · 78254 · 78256 · 78257 · 78258 · 78259
- Alamo Heights78209
- Leon Valley78238 · 78240
- Universal City78148
- Converse78109
- Live Oak78233
- Schertz78154
- Helotes78023
- Selma78154
- Windcrest78239
- Kirby78219
- Castle Hills78213
ZIP codes are 2020 Census ZIP Code Tabulation Areas, which closely approximate USPS ZIP codes. We list ZIPs that make up a substantial share of each community, so edge ZIPs that barely touch a town are left out, and some ZIPs span two towns.7 Not on the list? Send the form anyway, and we'll tell you if we can help.
Common questions
How much is the CPS Energy attic insulation rebate?
$0.35 per square foot when a contractor installs it, or $0.25 per square foot if you install it yourself.
What R-value does CPS Energy require?
For attics with more than 24 inches of clearance, a final R-38 or more, starting from no more than R-14. Low attics need a final R-19, starting from no more than R-11.
Does insulating over a garage qualify?
No. CPS Energy says garages and other non-living areas don't qualify.
Is there still a federal tax credit for insulation?
No. The IRS says the Energy Efficient Home Improvement Credit covers improvements made through December 31, 2025.
General information summarized from the public sources listed below. It isn't professional, engineering or legal advice. Codes and programs change; confirm current requirements with your local building department or utility before you start.
Sources
- CPS Energy, "Rebate Specifications" (attic insulation)
- CPS Energy, "Casa Verde Weatherization"
- U.S. Department of Energy, Building America, "Climate Zones" (IECC climate zone map)
- ENERGY STAR, "Recommended Home Insulation R-Values"
- U.S. EPA, "Protect Your Family from Asbestos-Contaminated Vermiculite Insulation"
- HomeGuide, "Attic Insulation Cost" (national figures, Jan. 13, 2026)
- U.S. Census Bureau, 2020 ZIP Code Tabulation Area relationship files