CornerstoneExterior Cleaning LLC
Premium window cleaning, solar panel washing, and gutter care — built on the kind of craftsmanship every great home deserves. No streaks, no shortcuts.
Actual before-and-after shots from recent window cleaning jobs — no filters, just pure water and a lot of care.
Four services, one standard: work sharp enough to notice and careful enough to trust around your home.
Interior and exterior glass, screens, tracks, and sills — hand-detailed for a streak-free, crystal-clear finish.
Most RequestedDust and grime quietly rob your panels of output. A gentle, deionized-water clean restores efficiency and protects your investment.
Boosts OutputWe clear leaves and debris, flush downspouts, and check for trouble spots that put your roofline and foundation at risk.
Protects Your HomeDriveways, walkways, siding, and patios refreshed with controlled pressure that cleans deep without damaging surfaces.
Curb AppealDrag each slider to compare before and after for every service we offer.
Illustrative examples — ask to see real job photos from our recent work.
We treat every property like it's the one detail people will remember. That mindset is the actual cornerstone of this business.
You're covered from the first ladder placement to the last window.
Safe for your landscaping, pets, and the solar panels doing the work on your roof.
If something's not right, we come back and make it right — no hassle.
You'll know the cost before we start. No surprise line items after.
We've built our reputation one clean window, one clear gutter,
and one efficient solar panel at a time.
We invest in professional-grade gear so the results speak for themselves — no soap, no streaks, no ladders leaned against your home.
Our XERO carbon-fiber poles reach up to 90 feet from the ground, so we can clean upper-story windows and solar arrays safely — no ladders resting on your siding or gutters.
XERO EquipmentOur XERO filtration systems purify the water down to zero dissolved solids, so glass and panels air-dry completely spot-free — no soap residue, no streaks, no chemicals near your landscaping.
XERO FiltersA look at the pure-water process behind every job we do.
Real feedback from customers who've had us out for windows, solar, and gutters.
"Cornerstone exterior cleaning is the best! Very customer oriented. They did a great job cleaning our windows. We are always nervous trying out somebody new, but we are so happy with this company. Couldn't resist the price. Great experience overall — big shout out to Samuel and Danny."
"These two young men did an absolutely fantastic job cleaning my solar panels. They showed up on time, worked carefully, and were genuinely kind, respectful, and professional. Their pricing was very fair and reasonable, and the results were immediate — my system was producing roughly 1 kW more than before the cleaning. I would absolutely hire them again."
Simple from the first call to the final walkaround.
Tell us about your home and which services you need. We'll give you a clear, upfront price.
Pick a time that works for you. We show up on schedule, ready to work.
Sit back while we handle the windows, panels, or gutters — then walk the results with you.
Fill out the form and we'll get back to you with pricing and availability — usually within one business day. As the owner-operator, Daniel personally handles every quote.
(619) 433-5973
dannyheras8@gmail.com
Serving Orange County and surrounding areas