Damp wall under a ductless mini-split.
Repaired a leaking refrigerant line, recharged the system, and checked the condensate drain.
Tech: Andrew · Jul 2026
Mini-Split Installation in Renton, WA
Zoned, whisper-quiet comfort without ductwork. Perfect for additions, ADUs, and rooms that never quite reach the right temperature.
From a bonus room in the Renton Highlands to a converted space in the older Cascade neighborhood, mini-splits solve the same problem across Renton: comfort in one room without touching the rest of the home's system.
01 · THE PROBLEM
Symptoms we see every week in Renton
- One room that's always too hot or too cold
- Adding an ADU, addition, or converted garage
- Ductwork is impractical or too costly
- You want per-room temperature control
02 · THE PRECISION SOLUTION
Spec'd to your Renton home
We size every system to your actual demand — not a one-size guess. Here's what a typical mini-split installation includes:
| Capacity | 9k–48k BTU |
|---|---|
| SEER2 | Up to 30.5 |
| Noise | 19–26 dB (whisper) |
| Zones | 1–8 per system |
Local notes
Mini-Split Installation in Renton: what's different here
Mid-century homes in Cascade and the Highlands often have older gas furnaces and undersized ducts, and lakefront Kennydale homes deal with more humidity. Ductless mini-splits are a good fit for older Renton homes in Renton Highlands and Kennydale that have baseboard heat or no ductwork upstairs. We plan line-set routes to keep them neat on the outside of the house.
Permits and inspections
A mini-split install typically needs a mechanical permit plus an electrical permit for its dedicated circuit. Mechanical and plumbing permits in Renton go through the City of Renton Development Services. When the work needs a permit, we pull it, schedule the inspection and leave you the paperwork.
Utilities and rebates
Renton homes get electricity from PSE, and most have PSE natural gas. Renton homeowners may qualify for utility, state or federal rebates. We point you to the current programs for your address before you sign.
Where we work in Renton
Our job records show more than 60 completed jobs for Renton customers across ZIP codes 98059, 98058, 98056, 98055, 98057. We take mini-split installation calls in Renton Highlands, Kennydale, Talbot Hill, Benson Hill, Cascade and the rest of Renton.
Recent Renton jobs
Real calls from our Renton job records
03 · THE OutToday GUARANTEE
Work we stand behind
12-year compressor warranty, 2-year labor, and a free first-season tune-up.
Book this serviceMini-Split Installation in Renton FAQs
Straight answers for homeowners in Renton.
Who issues the permit for mini-split installation in Renton?
Mechanical and plumbing permits in Renton go through the City of Renton Development Services. For mini-split installation, we apply for the permit, book the inspection, meet the inspector on site, and give you the final sign-off for your records.
Can a mini-split heat my whole Renton home?
Yes, a multi-zone system can heat and cool most Renton homes, but it depends on layout and insulation. We do a room-by-room load calculation and give a written quote. Renton homeowners may qualify for utility, state or federal rebates. We point you to the current programs for your address before you sign.
Which Renton neighborhoods do you cover?
Our job records show more than 60 completed jobs for Renton customers across ZIP codes 98059, 98058, 98056, 98055, 98057. We take mini-split installation calls in Renton Highlands, Kennydale, Talbot Hill, Benson Hill, Cascade and the rest of Renton. Call (425) 615-5000 for same-day service.
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