Which Los Angeles neighborhoods and communities do you serve?

Baseline serves homeowners within a 50-mile radius of Woodland Hills. That covers the San Fernando Valley (West Hills, Woodland Hills, Calabasas, Chatsworth, Northridge, Sherman Oaks, Studio City, Encino), the Conejo Valley (Thousand Oaks, Westlake Village, Agoura Hills), Santa Clarita, Simi Valley, Moorpark, Camarillo, the Westside (Brentwood, Pacific Palisades, Santa Monica), Malibu, Pasadena, Glendale, Burbank, and the South Bay. If you are unsure whether your address is within the service area, enter your zip code on the assessment booking page.

Indoor Air Quality Assessment · Los Angeles

Indoor air quality testing
for Los Angeles homes.

Q: What does the $195 indoor air quality assessment include?

The $195 assessment covers three things: calibrated sensor readings throughout the home (PM2.5, VOCs, CO2, humidity, temperature), a full HVAC visual inspection (filter condition, coil, drain, blower, combustion appliances), and your Baseline Report with documented findings, a Baseline Score, and specific recommendations. The $195 credits toward any mechanical upgrade we recommend. It does not apply toward a membership plan.

Q: How long does the assessment take, and do I need to be home?

Plan for 90 minutes to two hours depending on home size. You do need to be present for the owner interview at the start and the findings walkthrough at the end. The sensor readings and HVAC inspection happen in between, so you do not need to follow us room to room.

Q: What happens if the assessment finds a problem?

Every finding is documented in your Baseline Report with context: what we measured, why it matters, and what we recommend. Recommendations fall into three categories: mechanical upgrades Baseline can install (Fresh Air and Ventilation, Advanced Filtration, Humidity Control), ongoing monitoring via a membership plan, or low-cost behavioral changes you can act on immediately. There is no pressure to decide on the day of the assessment. Your $195 credit toward a mechanical upgrade stays open.

Q: How is this different from a standard home inspection?

A standard home inspector checks structural and mechanical systems visually and confirms they function as intended. They do not measure what is actually in your air. Baseline uses calibrated sensors to quantify particulate matter, chemical off-gassing, carbon dioxide, humidity, and temperature in the rooms where you live and sleep. Combined with the HVAC visual inspection, you get a picture of both the equipment condition and the air it is producing.

Calibrated sensors. A full HVAC inspection. A written report that tells you exactly what your home's air is doing, and what to do about it.

Establish Your Baseline: $195 Get the Free IAQ Guide

Serving homeowners in the San Fernando Valley, Westside, Malibu, Pasadena, and beyond. See full service area.

The problem

Your home's air is never
measured.

Los Angeles has wildfire smoke, traffic particulates, dry air, and homes sealed tight for energy efficiency. None of that shows up on your thermostat. The only way to know what you're breathing is to measure it.

2-5x

higher pollutant concentrations indoors compared to outdoor air, per EPA research

U.S. EPA

90%

of our time is spent indoors, yet indoor air quality is almost never monitored

EPA / WHO

800 ppm

CO2 threshold above which sleep quality is measurably affected in bedroom studies

ASHRAE 1837-RP

40-60%

target humidity range that balances respiratory protection against mold and dust mite risk. LA homes commonly run too dry.

Sterling 1985 / EPA

What goes undetected

Fine Particulate Matter (PM2.5)

Wildfire smoke, cooking combustion, and traffic exhaust. Particles this small reach deep into lung tissue. The EPA threshold is 9 μg/m³. Many LA homes run two to three times that.

VOCs and Chemical Off-Gassing

Formaldehyde from furniture and cabinets, cleaning products, paint, adhesives. New construction and recent renovations are especially high. Chronic exposure is linked to respiratory irritation and cognitive effects.

Carbon Dioxide (CO2)

A direct proxy for ventilation. Above 800 ppm, sleep quality degrades. Above 1,000 ppm, cognitive performance falls measurably. Standard HVAC systems recirculate air without addressing CO2 buildup.

Humidity Extremes

Southern California's dry climate and tightly sealed homes push humidity below 30%, increasing respiratory vulnerability and viral transmission. Excess humidity triggers mold. Neither extreme is visible.

What we measure

Six parameters.
One complete picture.

During the assessment, we take calibrated sensor readings throughout the home and conduct a full HVAC visual inspection. Nothing is estimated. Everything is documented.

PM2.5 Fine Particulate

Laser particle counter measuring fine particulate from cooking, wildfire smoke, HVAC filter failure, and traffic sources within the home.

EPA threshold: 9.0 μg/m³

VOCs and Chemical Off-Gassing

Total VOC index across all spaces. Elevated readings identify sources: cabinetry, flooring, paint, or attached garage infiltration.

Target: VOC index below 100

Carbon Dioxide (CO2)

Ventilation quality by room. High CO2 at night in closed bedrooms is one of the most underdiagnosed causes of poor sleep.

Baseline flag: above 800 ppm

Relative Humidity

Humidity across the home. Below 40% accelerates respiratory irritation; above 60% favors mold and dust mite growth.

Target range: 40-60% RH

Temperature

Temperature across the home reveals HVAC distribution problems and insulation gaps.

Comfort range: 68-76°F

HVAC Visual Inspection

Filter condition, coil, condensate drain, blower, electrical connections, combustion appliances. The system producing your air is inspected at the same time as the air it produces.

Included in every assessment

Schedule Your Assessment: $195 Read the Baseline Air & Health Reference

Residential neighborhood in the Los Angeles area

What you receive

The Baseline Report.

Every assessment produces a written report documenting what we found, what it means, and what we recommend. Not a generic checklist. An honest account of your home's air and the systems producing it.

Book the Assessment Get the free IAQ Guide first

Baseline Score

A 0-100 composite score calculated from all sensor readings. Gives you a single number to track improvement against over time.

Air Quality Findings

Sensor readings across the home, compared to Baseline thresholds, alongside HVAC inspection observations. You see exactly where your home stands and what needs attention.

HVAC Inspection Summary

Filter condition, coil, drain, blower, combustion appliances. Any deferred maintenance or safety observations are noted with recommended action.

Prioritized Recommendations

Mechanical upgrades Baseline can install, ongoing monitoring options, and low-cost actions you can take immediately. Ranked by impact.

$195 Upgrade Credit

The assessment fee credits toward any mechanical upgrade we recommend: Fresh Air and Ventilation, Advanced Filtration, or Humidity Control. No expiration on the day of the visit.

How it works

Three steps.
One visit.

The assessment takes 90 minutes to two hours. You need to be present at the start and end. Everything in between is handled by Baseline.

Owner Interview and Home Profile

We start with a 15-minute conversation: how long you've lived in the home, any health symptoms you've noticed, past HVAC work, recent renovations, pets, attached garage, and anything else that shapes what we look for. Context changes what the numbers mean.

Calibrated Sensor Readings and HVAC Inspection

We position a calibrated sensor near the HVAC return and run the system to capture a whole-home reading of air quality. Simultaneously, we inspect the system end to end: filter condition, coil, drain, blower, combustion appliances, electrical connections. Everything gets documented.

Findings Walkthrough and Baseline Report

At the end of the visit, we walk you through every finding, explain what we recommend and why, and leave you with the written Baseline Report. If you want to move forward with an upgrade or a membership, we can start the paperwork that day. If not, your $195 credit stays open.

Los Angeles highway obscured by wildfire smoke and orange haze

Southern California

The outside air finds its way in.
Baseline measures what gets through.

Why Baseline

More than an air quality test.

IAQ test kits measure one moment. Baseline connects sensor readings to your HVAC system, your home's specific conditions, and a licensed contractor who can act on what we find.

Calibrated sensors

Not consumer hardware

We use research-grade sensors, not $49 consumer monitors. Calibrated PM2.5 readings, electrochemical CO detection, NDIR CO2 measurement. The readings in your report are accurate enough to act on.

Licensed HVAC contractor

CSLB #1153130

Baseline holds a California C-20 HVAC contractor license. When the assessment finds something that needs to be fixed, we can fix it. No referral to a third party, no disconnect between the assessment and the work.

Professional methodology

Your HVAC return tells the story

Consumer monitors drop a sensor on a counter. Baseline positions a calibrated sensor near the return air while the HVAC system is running, capturing what is circulating throughout the home. Combined with the owner interview and a full HVAC inspection, this gives an accurate whole-home picture, not a snapshot of one spot.

Written documentation

A report you can use

Every finding is in writing. Sensor readings, HVAC inspection observations, and prioritized recommendations. Useful for real estate disclosures, rental negotiations, insurance documentation, or just knowing what you're dealing with.

Los Angeles context

We know this air

LA homes have specific IAQ pressures: wildfire smoke infiltration, drought-cycle humidity collapse, traffic particulate in the Valley, attached garages that push combustion products indoors, and cooling-season conditions that seal homes tight for months. Baseline's thresholds and recommendations are calibrated to Southern California conditions, not national averages.

Service area

Serving Los Angeles within a 50-mile radius of Woodland Hills.

Baseline accepts assessments throughout the greater Los Angeles area. Enter your zip code on the booking page to confirm your address is within the service area.

Not sure if you qualify? Call or text 818-237-3404.

Check Availability for Your Address

San Fernando Valley

West Hills, Woodland Hills, Calabasas, Chatsworth, Canoga Park, Northridge, Granada Hills, Porter Ranch, Reseda, Encino, Sherman Oaks, Studio City, Tarzana, Van Nuys, Burbank, Glendale

Conejo Valley and Ventura County

Thousand Oaks, Westlake Village, Agoura Hills, Moorpark, Simi Valley, Camarillo, Newbury Park

Santa Clarita Valley

Santa Clarita, Valencia, Newhall, Stevenson Ranch, Canyon Country

Westside and Malibu

Brentwood, Pacific Palisades, Santa Monica, Bel Air, Malibu, Topanga

San Gabriel Valley and South

Pasadena, Arcadia, Monrovia, Torrance, Manhattan Beach, Redondo Beach, El Segundo

Common questions

What to expect.

What does the $195 indoor air quality assessment include?

The $195 assessment includes calibrated sensor readings (PM2.5, VOCs, CO2, humidity, temperature), a full HVAC visual inspection, and a written Baseline Report with findings, a Baseline Score, and prioritized recommendations. The fee credits toward any mechanical upgrade we recommend.

How long does the assessment take, and do I need to be home?

Plan for 90 minutes to two hours. You need to be present for the owner interview at the start and the findings walkthrough at the end.

Which Los Angeles neighborhoods do you serve?

Baseline serves homeowners within a 50-mile radius of Woodland Hills, covering the San Fernando Valley, Conejo Valley, Westside, Malibu, Pasadena, and beyond. Enter your zip code on the booking page to confirm.

What happens if the assessment finds a problem?

Every finding is documented with what we measured, why it matters, and what we recommend. There is no pressure to decide on the day of the assessment, and your $195 credit toward any mechanical upgrade stays open.

How is this different from a standard home inspection?

A home inspector confirms mechanical systems function as intended but does not measure what is in your air. Baseline uses calibrated sensors to quantify PM2.5, VOCs, CO2, humidity, and temperature, combined with a full HVAC visual inspection.

Get started

Know what your home's
air is actually doing.

One visit. Calibrated sensor readings. A written report you can act on. The $195 assessment is the starting point for every Baseline relationship.