Ductless Mini Split Installation in the Bay Area
Perfect for garages, ADUs, room additions, and homes without existing ductwork. Single-zone and multi-zone systems with independent temperature control per room.
Ductless Mini Split Cost in the Bay Area
Ductless mini splits are the go-to solution for Bay Area homes without central ductwork, and for adding climate control to spaces like garages, ADUs, sunrooms, and room additions. A single-zone system starts at $8,500; multi-zone systems for 2–5 rooms run $10,000–$25,000.
Mini splits are especially popular in San Jose, Oakland, Berkeley, San Francisco, Fremont, and older Bay Area neighborhoods where homes were built before central HVAC was standard. They're also the preferred choice for garage conversions and ADUs — California's most popular home improvement category right now.
Every mini split system we install includes a full equipment warranty, 5-year labor warranty, city permits, and a free UV Air Scrubber to improve indoor air quality.
$8,500–$12,500
Single-Zone Installed Cost
One outdoor unit, one indoor head
$10,000–$25,000
Multi-Zone Installed Cost
One outdoor, 2–5 indoor heads
4–8 Hours
Installation Time
Non-invasive — just a 3-inch wall penetration
15–20 Years
System Lifespan
With annual filter cleaning
Mini Split System Pricing Guide
| System | Zones | BTU / Capacity | Installed Cost |
|---|---|---|---|
| Single-Zone Mini Split | 1 zone | 9,000–18,000 BTU | $8,500–$10,000 |
| Single-Zone High-Wall (2 ton) | 1 zone | 24,000 BTU | $9,500–$12,500 |
| 2-Zone Multi-Split | 2 zones | 18,000–30,000 BTU total | $10,000–$13,000 |
| 3–5 Zone Multi-Split | 3–5 zones | 36,000–60,000 BTU total | $15,000–$25,000 |
Prices include equipment, labor, and standard installation. Permits ($975–$1,675), electrical upgrades, and custom mounting (ceiling cassette, concealed duct) quoted separately.
Where Mini Splits Work Best
No ductwork means no limits. We install mini splits across all types of Bay Area properties.
Garage Conversions
Converting your garage to a gym, office, or living space? A single-zone mini split conditions the space in half a day without touching your home's ductwork.
ADUs & In-Law Units
California's ADU boom demands efficient, independent HVAC. A mini split gives your unit its own heating and cooling without tying into the main home's system.
Room Additions
New room addition not connected to your central system? A mini split is the cleanest solution — minimal wall work, independent control, and no duct extensions.
Older Bay Area Homes
Thousands of pre-1970 Bay Area homes were built without central HVAC. Mini splits add modern heating and cooling without the invasive ductwork installation.
Home Offices
Work from home year-round in comfort. A wall-mounted mini split keeps your office at your preferred temperature independently from the rest of the house.
Sunrooms & Bonus Rooms
Sunrooms can be unbearably hot in summer and cold in winter. A mini split solves both problems and makes your bonus room livable 12 months a year.
What's Included in Every Mini Split Installation
- Load calculation and zone sizing
- Outdoor unit pad or wall-bracket mounting
- Indoor air handler installation and wall penetration
- Refrigerant lineset installation and pressure test
- Electrical circuit and disconnect installation
- Refrigerant charge (EPA-certified technicians)
- Condensate drain line installation
- System commissioning and test run
- Remote/app setup and homeowner walkthrough
- FREE UV Air Scrubber ($800 value)
- Manufacturer warranty registration (10-year equipment)
- 5-year labor warranty
- City permit and inspection coordination
Factors That Affect Mini Split Cost
- Number of Zones: Each additional indoor head adds $2,000–$4,000 to the total cost, but is far cheaper than running separate single-zone systems.
- BTU Size: Sizing matters — too small and the unit runs constantly; too large and it short-cycles. We calculate the right capacity for your specific space.
- Mounting Type: Standard high-wall mounts are most affordable. Ceiling cassette or concealed duct installs require more labor and cost $500–$1,500 more per zone.
- Lineset Length: Longer runs between outdoor and indoor units require more refrigerant line and labor. Standard installs are 15–25 ft; longer runs add $200–$500.
- Electrical Circuit: Each system needs a dedicated circuit. If your panel is full or needs upgrading (200A), add $300–$3,000+.
- Permits: $975–$1,675 depending on city. Always included in your final quote.
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Ductless Mini Split FAQs
How much does ductless mini split installation cost in the Bay Area?
A single-zone ductless mini split installation in the Bay Area typically costs $8,500–$12,500 installed. Multi-zone systems (2–5 indoor heads, one outdoor unit) run $10,000–$25,000. Cost varies by brand, BTU size, number of zones, and wall or ceiling mounting complexity. All prices include equipment, labor, and permits.
What is a ductless mini split and how does it work?
A ductless mini split is a heating and cooling system with no ductwork. It consists of an outdoor compressor unit and one or more indoor air handlers (heads) mounted on walls or ceilings. Refrigerant lines connect the units through a small hole in the wall. Each indoor head has its own remote or thermostat, allowing independent temperature control per room or zone.
Is a mini split good for a garage, room addition, or ADU?
Absolutely — ductless mini splits are the ideal solution for spaces without existing ductwork. They're perfect for garage conversions, room additions, ADUs (accessory dwelling units), sunrooms, home offices, and older Bay Area homes that were built without central HVAC. Installation is non-invasive: just a small 3-inch hole for the refrigerant lines.
Can a mini split heat as well as cool?
Yes. All modern mini splits are heat pumps — they provide both heating and cooling. Most Bay Area-appropriate systems heat efficiently down to 5°F outdoor temperature. For coastal areas that rarely freeze, a mini split often replaces both a space heater and window AC in one compact system.
What's the difference between single-zone and multi-zone mini splits?
A single-zone system has one outdoor unit connected to one indoor head — ideal for a single room or garage. A multi-zone system connects one outdoor unit to 2–4 indoor heads in different rooms, each controlled independently. Multi-zone is more cost-effective than installing separate single-zone systems when you need to condition multiple spaces.
Do ductless mini splits require a permit in the Bay Area?
Yes. Mini split installation requires a mechanical permit and inspection in all Bay Area jurisdictions. We handle all permitting and schedule the city inspection as part of every installation. Permit fees ($975–$1,675 depending on city) are included in our quoted price.
What Our Customers Say
Had a Carrier Infinity heat pump installed to replace our old gas furnace and AC. The crew was professional, finished in one day, and the system is incredibly quiet. Our PG&E bill dropped by about 40% the first month. Best HVAC contractor we've ever worked with.
Michael T.
Walnut Creek, CA
Heat Pump InstallationWe got a Lennox furnace and AC combo for our 2,400 sq ft home. The online estimator gave us an accurate quote and there were zero surprises on install day. They pulled permits, handled everything with the city, and even helped us understand the HEEHRA rebate process.
Sarah L.
San Ramon, CA
Furnace & AC InstallationReplaced a 22-year-old Trane system with a new Daikin dual fuel setup. The heat pump handles 90% of our heating now and the gas furnace kicks in on the coldest mornings. Installation team was on time, clean, and thorough with the electrical and lineset work.
David & Karen W.
Dublin, CA
Dual Fuel InstallationInstalled a Mitsubishi ductless mini split in our converted garage and master bedroom — two zones, one outdoor unit. No ductwork needed and each room has its own temperature control. Whisper quiet and our energy bills actually went down.
Jennifer M.
Pleasanton, CA
Ductless Mini Split InstallationOur old AC died during a 105° heat wave. They had a new American Standard 16 SEER2 system installed the next day. Fast response, fair pricing, and the new unit cools our 1,800 sq ft home evenly. Highly recommend for AC installation in the East Bay.
Robert H.
Concord, CA
AC InstallationGot a Bosch heat pump for our 3,000 sq ft home. The German engineering really shows — it's the quietest system I've ever had. They also installed new ductwork in the attic and a UV air scrubber. Everything was included in the quote, no hidden fees.
Lisa P.
Danville, CA
Heat Pump Installation