Trusted local security for homes & businesses across the Kansas City Metro.
Family-owned for decades. Professional installation, monitoring, cameras, access control, and fire alarm systems — backed by real people you can actually reach.
- Serving the entire Kansas City Metro
- Residential & commercial systems
- Fire alarms, cameras, access control, intercoms
- Local installation, service & monitoring
Complete protection — designed, installed, and supported locally
From a single home alarm to multi-building commercial systems, we handle the whole job and stand behind it.
Security System Installation
Professionally designed alarm systems built around your home or business — not a one-size-fits-all kit.
Fire Alarm Systems
Code-compliant fire alarm design, installation, and inspections to protect lives and property.
Surveillance Cameras
HD camera systems with mobile viewing so you can keep an eye on what matters from anywhere.
Access Control
Control who comes and goes with keypads, fobs, and smart locks for offices, warehouses, and facilities.
Intercom Systems
Modern intercoms for homes, businesses, gates, and multi-building properties.
Medical Alert Solutions
Help is one button away — peace of mind for seniors and loved ones living independently.
24/7 Monitoring & Support
Professional monitoring with fast dispatch, plus real local technicians when you need service.
Upgrades & Takeovers
Already have a system? We can service, upgrade, or take over many existing setups — no full replacement needed.
Protect your home, your family, and the things you care about most
From entry-point sensors to full smart-home integration, we design home security systems around your property — not a sales script. Add cameras, monitoring, smart locks, and mobile alerts whenever you're ready.
- Custom-designed alarm systems for your home
- Indoor and outdoor HD cameras with mobile viewing
- 24/7 professional monitoring options
- Smart locks, doorbell cameras, and entry control
- Help upgrading or replacing older systems
Built for offices, retail, warehouses, churches, and multi-building sites
Whether you run a small business or manage multiple facilities, we design scalable systems that give you control, visibility, and peace of mind — and we're here long after the install.
- Access control for one door or hundreds
- HD camera coverage with remote viewing
- Burglar and fire alarm system integration
- Service plans and ongoing technical support
- Solutions for offices, retail, warehouses, churches, and property managers
Don't start from scratch — we can upgrade or take over your existing system.
Many homes and businesses already have alarm or camera equipment that's outdated, unmonitored, or no longer supported. In most cases, we can service, upgrade, or take it over without ripping everything out.
- Take over and modernize your existing equipment
- Add cameras, access control, or monitoring to what you already have
- Get professional help if your current setup is unsupported
- Honest evaluation — we'll tell you when an upgrade is worth it
A real local company — not a faceless national brand or a DIY box
DIY systems leave you on your own. National chains forget you after the install. We do neither.
Real local support
Talk to a real person in the Kansas City Metro — not an overseas call center.
Custom system design
We design around your property and your priorities, not a sales script.
Homes and businesses
From single-family homes to multi-building commercial sites, we do both well.
We back what we install
Service, upgrades, and support after the sale — for years, not weeks.
Better than DIY
Professional design and installation that actually works when you need it most.
Monitoring that responds
24/7 professional monitoring with fast, reliable dispatch.
Proudly serving the entire Kansas City Metro
Based in Lee's Summit, Missouri, we serve homes and businesses across the Kansas City Metro and surrounding communities — about a 50-mile radius across both Missouri and Kansas.
- Kansas City, MO
- Kansas City, KS
- Lee's Summit
- Independence
- Blue Springs
- Overland Park
- Olathe
- Lenexa
- Shawnee
- Liberty
- Gladstone
- Raytown
- Belton
- Raymore
- Grandview
- Leawood
Not sure if you're in our area? Just give us a call.
A straightforward process from first call to ongoing support
Consultation
We listen first — your property, your concerns, your goals.
System Design
A custom plan and honest quote built around what you actually need.
Professional Installation
Clean, careful installation by trained local technicians.
Service & Monitoring
Ongoing support, monitoring, and upgrades whenever you need them.
Trusted by homeowners and businesses across the metro
“They walked us through every option without pressure. The install was clean and the team actually answers when we call.”
“We needed access control across two buildings. Three D designed it right and trained our staff. Solid, dependable people.”
“Our old monitoring company disappeared. Three D took over our existing system, fixed what was broken, and we're paying less.”
Answers to common questions
Don't see your question? Call (816) 554-2986 — a real person will help.
Get a free, no-pressure quote
Tell us a little about your home or business and a local team member will follow up — usually the same business day.
After you submit, we'll reach out to schedule a free consultation. No pressure, no hard sell.
Talk to a local security expert today
Free, no-pressure consultation. We'll help you protect what matters — at home or at work.
Family-owned. Local technicians. Serving the entire Kansas City Metro.