A complete map of the certifications you'll see on Austin listings — what they mean, what they're worth, and how to evaluate them.
| Run by | Austin Energy (municipal) |
|---|---|
| Tiers | 1, 2, 3, 4, 5 stars |
| Launched | 1991 — first US municipal green-building program |
| Best for | Local-relevance signal; works alongside other certifications |
AEGB rates homes across energy, water, IAQ, materials selection, and community/site impact. 4-star and 5-star homes are common in Austin's central and east submarkets and are a strong "green inventory" signal even before you look at LEED or Passive House.
| Run by | U.S. EPA |
|---|---|
| Threshold | ≥10% more efficient than current IECC code |
| Typical HERS | 50–60 |
| Best for | Baseline performance verification on new construction |
Energy Star is the most common entry-level certification on new Austin homes. It's a useful baseline, but if you want deep performance, look beyond Energy Star to AEGB 4+ stars, LEED Silver+, or Passive House.
| Run by | U.S. Green Building Council (USGBC) |
|---|---|
| Tiers | Certified, Silver, Gold, Platinum |
| Coverage | Energy, water, materials, IAQ, site, innovation |
| Best for | Multi-criteria performance with international recognition |
LEED is the most internationally recognized certification, and the multi-criteria nature means you're not just optimizing energy — you're getting verified performance on water, materials, IAQ, and site as well. Austin has a deep stock of LEED-certified residential projects, especially in 78702, 78703, and 78704.
| Run by | Passive House Institute US (PHIUS) or international Passive House Institute (PHI) |
|---|---|
| Hallmarks | Extreme airtightness; continuous insulation; verified blower-door |
| Energy Savings | Typically 70–90% vs. code minimum |
| Best for | Buyers who want the deepest performance available |
Passive House is the most rigorous standard. The envelope and ventilation requirements are exacting, and the verification process is strict. A Passive House home in Austin will be dramatically more comfortable in summer heat, near-silent inside, and have utility bills a fraction of conventional construction.
| Net-Zero | Annual on-site energy production = annual consumption |
|---|---|
| Net-Zero Ready | Tight enough that adequate PV would close the gap |
| DOE ZERH | Federal program requiring Energy Star + Indoor airPLUS + water efficiency + HERS low enough to support PV |
| Best for | Buyers prioritizing zero-net operating cost and grid independence |
True net-zero homes are still a small share of Austin inventory, but the segment is growing fast — particularly in East Austin infill, sustainable master-planned communities (Whisper Valley), and Lake Austin estate-scale custom builds.
The Home Energy Rating System (HERS) Index is the single best comparison number. Lower is better:
| HERS Score | What it means |
|---|---|
| 100 | 2006 IECC reference (baseline) |
| 70 | Approximate current Austin code-built new home |
| 55–65 | Energy Star Certified |
| 40–55 | AEGB 4-star, LEED Gold, well-built green |
| 30–45 | Deep-green, Net-Zero Ready, AEGB 5-star |
| 0 | Net-Zero (PV closes the gap) |
| Negative | Net-positive (sells excess to grid) |
| If your goal is... | Look for... |
|---|---|
| Lower utility bills with a modest premium | Energy Star, AEGB 3-star, HERS 50–60 |
| Deep performance with international recognition | LEED Silver/Gold, AEGB 4-star |
| The most comfortable home in summer heat | Passive House (PHIUS or PHI) |
| Zero net operating cost | Net-Zero or Net-Zero Ready / DOE ZERH |
| Healthy indoor air for asthma / allergies | Indoor airPLUS, healthy-material specs (see hempcrete page) |
| Carbon-negative construction | Hempcrete walls + healthy-material spec + on-site PV |
Energy Star is a federal program that verifies a home is at least 10% more efficient than IECC code minimums — relatively easy to achieve. LEED for Homes is a multi-criteria USGBC certification covering energy, water, materials, IAQ, and site — Certified through Platinum tiers. Passive House (PHIUS or PHI) is the most rigorous low-energy standard, requiring extreme airtightness, continuous insulation, and verified blower-door performance — typically achieves 70–90% energy reduction vs. code minimums.
A Net-Zero Ready home is built tight enough that adding a properly sized solar PV array would close the energy gap to net-zero on an annual basis. The DOE Zero Energy Ready Home program is the federal standard — it requires Energy Star certification, IAQ measures (Indoor airPLUS), water-efficient fixtures, and a HERS index low enough that PV can complete the package.
The Home Energy Rating System (HERS) Index is a 0-to-100+ score where 100 = a 2006 IECC code reference home and 0 = a net-zero home. New code-built homes typically score around 60–70. Energy Star homes score 50–60. Deep-green homes score 30–50. Net-Zero Ready homes score under 50 with PV closing the gap to 0 or below.
Austin Energy Green Building (AEGB) is the City of Austin's municipal green-rating program — the first in the United States, launched in 1991. AEGB rates homes from 1 to 5 stars across energy, water, IAQ, materials, and community impact. AEGB 4-star and 5-star homes are common in the Austin market and signal serious performance.
It depends on your goals. For broad performance, AEGB 3+ stars or LEED Silver is a strong baseline. For deep performance, look for Passive House or AEGB 5-star. For carbon-neutral operation, look for net-zero or net-zero-ready. For health, look for Indoor airPLUS, low-VOC specifications, and Healthy Materials documentation. Henry helps buyers match certification depth to the price point and performance they actually want.
In Austin, generally yes — particularly at higher tiers. Certified-home premiums in Austin's central, east, and south submarkets are typically 5–15% over comparable conventional construction, and the energy and comfort math closes that delta within a few years for most buyers. Certifications also signal to future resale buyers that the performance claims are independently verified.
Most certifications require a third-party rater or commissioning agent who runs blower-door tests, duct-leakage tests, and energy modeling. LEED requires verified documentation of every credit. Passive House requires the strictest envelope verification. AEGB has a project-by-project rater system. The verification is what makes the certification valuable — it's not self-reported.