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Affordable Plumbing, Heating & Air Conditioning

At Oasis Plumbing, Heating & Air Conditioning, we believe comfort should not come with a hefty price tag. Serving the heart of San Marcos, CA and surrounding area, we are committed to providing our community with top-tier HVAC & plumbing solutions that are both reliable and affordable. Whether you need an immediate plumbing repair, a summer cooling fix, or a cozy winter warmth setup, we ensure your home or business enjoys optimal comfort without stretching your budget. Experience the Oasis difference – where premium meets affordability.

Plumbing, Heating and Air Conditioning Services in San Marcos, CA
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Decades of experience and a commitment to excellence make Oasis a top choice for any HVAC or plumbing needs.

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Our promise is not just quality workmanship – it is your complete satisfaction. We stand by every service.

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Our flexible financing options are tailored to accommodate every client’s budget, ensuring you do not have to compromise on quality.

Best HVAC & Plumbing Company in San Marcos, CA

Welcome to Oasis Plumbing, Heating & Air Conditioning, your premier choice for HVAC and plumbing services in San Marcos, CA. We are dedicated to ensuring your home remains comfortable and efficient all year round.

Our HVAC services include expert AC installation, seamless AC replacement, and prompt AC repair. For advanced solutions, we offer ductless AC and mini-split installations. As winter approaches, rely on our professional heater and gas furnace installations, efficient furnace replacements, and reliable repairs. Our heat pump installations and replacements are perfect for eco-conscious homeowners. Additionally, we provide precise thermostat installations, thorough maintenance services, and optimized ductwork installations and replacements.

Oasis also offers comprehensive plumbing services. From routine maintenance and emergency repairs to new fixture installations, our experienced plumbers handle all your plumbing needs with care and precision.

Choosing Oasis means choosing excellence. We pride ourselves on our dedication to quality, customer satisfaction, and prompt service. Discover why homeowners in San Marcos trust us to keep their homes comfortable and systems running smoothly.

San Marcos HVAC Services

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Trusted HVAC & Plumbing Excellence in San Marcos: Experience the Oasis Advantage

100% Satisfaction Guarantee

Providing top-tier HVAC & plumbing services is our standard. With warranties that exceed the usual industry standards for both equipment and labor, our utmost priority is to ensure your complete satisfaction with every project.

Experienced & Knowledgeable

Boasting over three decades in the HVAC & plumbing fields, our team delivers unparalleled expertise to every task. Our commitment to ongoing training and learning guarantees state-of-the-art solutions and premier service for all your home comfort needs.

Fair, Upfront Pricing

Marrying excellent AC, heating & plumbing expertise with clear, upfront pricing is our pledge. You can anticipate competitive rates without any unexpected costs or hidden charges, and our install and replacement estimates will always be free!


We firmly believe that everyone deserves optimal indoor comfort, regardless of budget constraints. Explore our flexible financing options to ensure home comfort without the financial stress.

Above and Beyond Factor

Our dedication to excellence is not just about systems and solutions. It is about the relationships we build. Every interaction, big or small, is valued. We strive to ensure that everyone—whether a loyal customer or a first-time inquirer—feels the depth of dedication and expertise our team brings.

Give Us a Call! Or Let Us Contact You!
(619) 626-2499

    Ready to Get Started?

    Schedule Appointment

    Contact us to schedule your in-home free consultation.


    Home Evaluation & Customized Plan

    We will help you to determine the best system for your home based on your needs, space, and budget.


    Install & Execute

    Our team will install the system of your choice and ensure it works perfectly.

    Don’t Listen to Us.
    Listen to Our Past Clients.

    areas we serve

    • Alpine
    • Bonita
    • Bonsall
    • Cardiff by the Sea
    • Carlsbad
    • Chula Vista
    • Coronado
    • Del Mar
    • El Cajon
    • Encinitas
    • Escondido
    • Fallbrook
    • La Jolla
    • La Mesa
    • Lake Elsinore
    • Lakeside
    • Lemon Grove
    • Menifee
    • Murrieta
    • National City
    • Oceanside
    • Pala
    • Poway
    • Ramona
    • Rancho Santa Fe
    • San Diego
    • San Marcos
    • Santee
    • Solana Beach
    • Spring Valley
    • Temecula
    • Valley Center
    • Vista
    • Wildomar