High Performance Homes in San Antonio: 10 Things We Learned Building 200+ of Them

We've built over 200 high performance homes in San Antonio. Here's what we've actually learned — not what sounds good in a brochure.

A high performance home isn't just energy-efficient. It's healthier, quieter, more durable, and cheaper to own over time. But none of that happens by accident. It takes deliberate decisions at every phase of the build. Here are the 10 most important lessons we've picked up over the last decade.

1. Energy efficiency doesn't require sacrifices

This is the first thing clients worry about — that going high-performance means giving something up. It doesn't. You can have the design you want, the location you want, and still build an efficient home.

The tools that get you there are straightforward: solar panels and battery storage, high-efficiency HVAC, LED lighting, smart thermostats, good windows, and thorough air sealing. None of these compromise how the home looks or lives. There are real certifications that verify this — LEED, NetZero, Energy Star, Passive House, HERS. They matter because they give you an independent benchmark, not just a builder's promise.

2. The cost savings are real — and they add up fast

A high performance home costs more to build. That's true. But the math flips when you look at what you're paying every month to live in it.

We've seen clients cut their energy bills by hundreds of dollars a month. Over 10 years, that's significant money back in your pocket — before you factor in lower maintenance costs, potential tax credits, and higher resale value. Buyers increasingly pay a premium for homes that don't bleed money on utilities. The global green homes market is on track to double to $240 billion by 2027. That's not a niche anymore.

3. Environmental sustainability matters — and it's practical, not political

Buildings account for roughly 40% of global energy consumption. The homes we build contribute to that, or they don't — and we'd rather build ones that don't.

Beyond the environment, this directly affects the people living in the house. Tight, well-ventilated homes have better indoor air quality. That means fewer allergens, less moisture, and lower exposure to the pollutants that cause respiratory problems. Clients notice it after they move in.

4. Air sealing cannot be overlooked

This is the one that surprises most clients. They think insulation is what keeps the house comfortable. It's not — it's the combination of insulation AND air sealing that does it. You can have great insulation and a leaky house and still have hot, cold, and drafty rooms.

Proper air sealing saves an average of 15% on heating and cooling costs, according to Energy Star. In Texas heat, that's not a rounding error.

We use Aeroseal as our preferred air sealing method. It's a patented process that seals leaks from the inside out using a non-toxic aerosol that fills gaps and cracks in ducts and walls. It can seal up to 90% of air leaks in a typical home. Fast, verifiable, and we've seen the results firsthand on hundreds of builds. The point of all that sealing is a measurable result — a tight envelope you can prove with a blower-door test, which is exactly what the ACH50 and HERS numbers we build to actually mean.

5. HVAC and air quality are a top priority

A great HVAC system in a leaky, poorly insulated house is throwing money at the wrong problem. But in a tight, well-sealed home, the right HVAC setup changes how the house feels entirely.

We work with Mitsubishi and Daikin — both offer mini-split, multi-zone, ductless, and heat pump systems that are efficient, quiet, and built to last. Zoned systems mean different parts of the house stay at different temperatures without fighting each other. In a Texas climate, that matters a lot.

6. Low-voltage lighting looks better and is safer too

Low voltage (DC) lighting uses less power, produces better light, and lasts longer. It runs at 12V or 24V instead of 120V — lower risk of shock, lower fire risk, and fixtures that can last up to 50,000 hours. The light quality is genuinely better: cleaner, more natural, more flattering. Clients who've lived in conventionally lit homes notice the difference immediately.

7. Insulation depends on your climate — don't apply national averages to Texas

Not all insulation is equal, and what works in Minnesota isn't the right answer for San Antonio. Climate-specific insulation choices are one of the areas where we see the biggest gaps between builders who know Texas and builders who don't.

In our hot, humid subtropical climate, fiberglass has proven to be one of the most effective options. It's fire retardant, water resistant, and formaldehyde-free. It holds its R-value over time — that rating measures how well the material slows heat transfer — and it's been reliable across hundreds of builds. Spray foam is another tool we use in specific applications. The right answer depends on the house, not a formula.

8. Water efficiency is part of the equation

A high performance home isn't just about energy. Water matters too — both the quality of what comes out of the tap and how much of it you're using.

We've worked with Elite Water Systems on whole-house water filtration for many of our builds. Their systems use kinetic degradation fluxion (KDF) to remove up to 99% of contaminants, plus activated carbon filters for chlorine, organic compounds, and odors. Combined with low-flow fixtures and efficient water heaters, clients see real reductions in monthly costs — and they're drinking and bathing in cleaner water.

9. High performance windows can make or break the whole system

Windows are where a lot of builders cut corners. Code minimum in the U.S. is double-pane — fine on paper, not good enough if you're actually building a high performance home.

For homes with significant direct sun exposure, we spec triple-pane windows. Three layers of glass, two insulating barriers. They block significantly more noise, filter out up to 99% of UV rays, and are more resistant to breakage. They also hold heat or cool air in a way double-pane simply can't match in this climate. The window decision affects every other system in the house. Get it wrong and the HVAC compensates all day. Get it right and the whole home runs better.

10. Follow international standards — U.S. code minimums aren't the benchmark

U.S. building codes set the floor, not the ceiling. If that's all your builder is aiming for, you're getting a code-compliant home — not a high performance one.

Two standards worth knowing: the Passive House Standard (originating in Germany) requires extreme insulation, air tightness, and ventilation, resulting in minimal heating and cooling demand. The Living Building Challenge is a U.S.-born certification requiring net-positive performance across energy, water, waste, and social impact. We benchmark against standards like these because they push us to build better homes.

Build Your High Performance Home with UrbanLUX

If you're serious about building a home that performs — not just one that looks good on day one — we'd like to talk. We bring over 200 high performance builds of experience to every project and we'll walk you through exactly what makes sense for your budget, your lot, and your goals. You can also see every performance system we make standard in an UrbanLUX home.

Contact us to get started.