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Our flagship division
Cairn Smart
Home automation, theater, networking, lighting, shades, and security — designed and installed to feel effortless.
24-hour estimates · weekends included
01
NH Registered
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Fully Insured
03
Licensed Trades
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24/7 Emergency
01
NH registered
OSNH Home Services LLC, an established New Hampshire company.
02
Fully insured
General-liability coverage on every job, in every home.
03
Licensed trades
Electrical and plumbing performed by NH state-licensed professionals.
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One company
Smart home, build, and care — one accountable point of contact.
Cairn Smart services
01
Smart Home Automation
One tap controls your whole home.
02Home Theater & AV
Cinema sound and picture, cleanly installed.
03Wi-Fi & Home Networking
Fast, reliable coverage in every room.
04Smart Lighting
The right light, automatically.
05Motorized Shades
Light and privacy, on schedule.
06Security Cameras & Access
See and control your home from anywhere.
07Smart Locks & Keyless Entry
Keyless, controlled, and logged.
08Video Doorbells
See every visitor, from anywhere.
09Commercial Smart Building Systems
Smarter, more efficient commercial space.
10Commercial Security & Access
Protect your business, on your terms.
11Commercial Network Cabling
The backbone your business runs on.
12Control4 Smart Home Systems
One elegant system for the whole home.
13Lutron Lighting & Shades
The gold standard in light control.
14Sonos Whole-Home Audio
Great sound in every room.
15TV Mounting
Mounted level, with the wires hidden.
16Home Theater & Surround Sound
Cinema at home, properly done.
17Move-In Setup
Walk into a home that's ready and secure.
Home-care plans
Membership turns one-off fixes into a home that is watched over year-round — priority service, member pricing, and proactive care.
Foundation
Proactive care for a connected home.
$99/month
Homeowners with a smart-home or networking system who want it watched over.
- 2 maintenance visits per year (spring + fall)
- Remote monitoring — alerts if a camera, network, or smart device goes offline
- 48-hour priority scheduling ahead of non-members
- 10% off all labor and materials
- Annual whole-home systems review with a written report
- Smart-home + Wi-Fi firmware updates kept current
Most chosen
Signature
Whole-home maintenance, handled.
$249/month
Busy professionals who want one company keeping the whole home in order.
- Everything in Foundation
- 4 quarterly seasonal maintenance visits
- 1 included service hour each quarter (small fixes, mounting, adjustments)
- Annual safety checks: drain flush, water-heater + plumbing, electrical panel
- Same-day priority + after-hours emergency response
- 15% off all labor and materials
Estate
Full property management and concierge care.
$499/month
Estate and second-home owners who want total peace of mind.
- Everything in Signature
- Monthly on-site property walkthrough with a photo report
- 2 included service hours per month
- 24/7 concierge line with a guaranteed 2-hour emergency response window
- Vacant / second-home watch (weekly check while you're away)
- Vendor coordination + project management for out-of-scope work
- 20% off all labor and materials
Start here
Get a free Cairn Smart quote
Tell us about your project. We respond fast — usually the same day — with a clear, honest plan.
- — Same-day response on most requests
- — Licensed, insured, and accountable
- — Clear pricing before any work begins