Markham Home and Business Security Systems

Grand Alarms installs home alarm systems, business security systems, smart cameras, smart locks and 24/7 alarm monitoring for Markham properties.

Get a professionally installed system built for your doors, windows, cameras, app control and real monitoring needs.

– Proudly Protecting Markam –

4.7 Stars

1,288+ HomeStars reviews

A+ BBB Rating

Established GTA security company

ULC-Approved

Professional Monitoring Centre

Markham Service

Homes, condos, and businesses

Home » Service Areas » Markham, Ontario

Markham Security System Packages

Choose a Markham alarm package that fits your property, then customize it with smart cameras, doorbell video, smart locks, smoke detection, water protection and app control. How much does a home alarm system cost in Markham? Grand Alarms packages range from $32.99 to $59.99 per month, with $0 upfront options and a 3-year price lock. 24/7 ULC-approved monitoring is included on every plan.

Markham Essentials Package

$32.99/mo.

3-year price lock

24/7 Monitoring
Backup Battery
Cellular Communicator
Comprehensive Warranty
Door & Window Sensors
Lawn Sign & Stickers
Motion Sensors
SmartHub Security Panel

Markham Standard Package

$39.99/mo.

3-year price lock- $0 Upfront

• Arm and disarm from your phone
• Get alerts while away

Markham Plus Package

$59.99/mo.

3-year price lock

• Answer your door from anywhere
• More visibility around your home

Not sure which package fits your Markham home or business?

or call a Markham expert: 416-657-2100

Free, no-obligation • same-day response during business hours.

Smart Cameras for Markham Properties

Indoor and outdoor smart cameras help Markham businesses and homes capture events clearly and receive fast alerts. Cameras work with your alarm system and monitoring team to improve day to day security awareness.

High-definition video clarity

Wide-angle view of your doorway

Night vision for after-dark security

See faces, packages, and activity clearly

Smart Doorbell Camera for Markham Homes

Smart doorbell camera showing an unwanted guest near the front door of a Markham home — Spot and deter unwanted visitors at your Markham door.

Smart doorbell camera showing a child arriving home at a Markham property — Know when the kids get home safe in Markham.

Smart doorbell camera showing a package delivery at the front door of a Markham home — Get an alert the moment a delivery arrives at your Markham home.

Smart Locks for Markham Homes and Businesses

A smart lock manages entry with simple codes and app control. Markham families and businesses use smart locks to secure doors, track access, and connect to the entire home or business security system.

Mobile Security Alerts for Markham Alarm Systems

Security app showing smart-lock status for a Markham home alarm system — Check your locks from anywhere in seconds.

Mobile alert showing a door left unlocked at a Markham property with a connected alarm system — Never wonder if you locked up — your Markham system tells you.

All-in-One Security Systems for Markham Homes and Businesses

A complete Markham alarm system brings sensors, cameras, smart controls, and monitoring into one simple platform. This all in one approach keeps your home or business protected with real time alerts, easy automation, and reliable coverage.

Smart Security Devices for Markham Homes and Businesses

24/7 Professional Monitoring

Top-Quality Security Equipment

Free Mobile App with Instant Alerts

Live Camera Views, Anytime

Smart Access Control for Markham Homes & Businesses

Security System Installation in Markham

Our installation teams understand home and business layouts across Markham. Every alarm system is set up for full coverage, connected to smart features, tested for accuracy, and supported by a company that stands behind its work with long term service.

Why Markham Trusts Grand Alarms

Grand Alarms is a local, GTA-based security company headquartered minutes from Markham in Vaughan.

Our work is backed by an A+ rating with the Better Business Bureau and a 4.7-star rating across more than 1,280 verified HomeStars reviews — one of the largest review bases of any security provider in the GTA.

Every system connects to a ULC-approved monitoring centre, the highest standard for alarm monitoring in Canada, and is installed by licensed, insured technicians who know Markham’s homes, condos and commercial properties.

• A+ Better Business Bureau rating
• 4.7★ from 1,288+ verified HomeStars reviews
• ULC-approved central monitoring station — Canada’s top alarm-monitoring standard
• Licensed, insured, background-checked installers
• Local GTA team serving Markham and York Region

Security Expertise in Key Markham Neighbourhoods

Markham includes established neighbourhoods, new developments, and busy business districts that benefit from strong home and business security systems. Our company supports reliable alarm monitoring and smart system integration across these local areas.

Grand Alarms Ltd. | 9000 Keele Street Suite 12 Vaughan Ontario L4K 0B3

Home Security and Alarm Systems in Unionville

Unionville’s mix of heritage homes and modern builds requires flexible security. Smart cameras, door sensors, and twenty four seven monitoring help homeowners protect large properties and active streets.

Smart Home Security in Cornell

Cornell’s high density design makes strong home security essential. Smart alarm systems, mobile alerts, and monitored protection help families stay aware of activity even when streets get busy.

Security Systems and Alarm Monitoring in Greensborough

Greensborough residents value quiet streets but still rely on smart home systems, outdoor cameras, and dependable monitoring to protect entrances, driveways, and shared community spaces.

Markville

Near Markville, established homes and retail corridors create demand for both residential alarm systems and commercial camera protection.

Milliken

Milliken has mature residential streets and commercial plazas that benefit from layered alarm protection, indoor cameras and 24/7 monitoring.

Berczy Village

Berczy Village homeowners often want smart, app-driven security from day one, including sensors, cameras, doorbell video and mobile alerts.

Box Grove

Box Grove homes and nearby commercial areas need flexible coverage for entrances, garages, driveways and business access points.

Cathedraltown

Cathedraltown properties often need multi-zone security systems with cameras, smart locks, glass-break detection and professional monitoring.

Angus Glen

Angus Glen luxury properties benefit from comprehensive perimeter security, smart cameras, motion detection and monitored response.

24/7 ULC-approved Alarm Monitoring in Markham

Monitoring teams review every event, confirm activity, contact you instantly, and coordinate assistance when needed. Markham homeowners and businesses rely on continuous monitoring to keep their alarm system active at all times.

Markham Customers Share Their Experience

Homeowners and business owners across Markham choose our company for smart systems, dependable installation, and strong monitoring support. Here is what local clients say.

★★★★★

Tech support on security alarm

David Isabello
HomeStars Review
December 2019

“Great customer service. Any time I call I get someone professional on the other end of the line. Any issues get addressed immediately. They have a great call centre that is easy to speak to someone.”

Read Review On HomeStars

★★★★★

Home alarm service

Avery Chen
Google Review
May 2026

“I’ve had great experience with Grand Alarm so far. The installation was professional. The mobile app is intuitive, with instant alerts and easy arming/disarming. But what really sets them apart is the customer support.”

Read More Google Reviews

★★★★★

Customer Support

Pavithra Ganesan
Google Review
April 2026

“We have been with grand alarms for close to 6 years now. Their customer & technical support has been excellent. We were also provided with upgrades when we signed up.”

Read More Google Reviews

Markham Home Security System FAQs

Q: Do Markham homes benefit from modern alarm systems?

Yes. A modern alarm system helps Markham homes detect movement, track openings, and support smart automation. With sensors, cameras, and professional monitoring, homeowners stay informed about activity in real time. Many families add smart locks and mobile controls for simple daily use.

Q: Why do Markham businesses use professional monitoring?

A business property often sits unoccupied after hours. Professional monitoring teams review every alarm event, verify activity, and contact you when something needs attention. This protects inventory, equipment, and staff, and gives business owners peace of mind.

Q: What smart devices can I add to my Markham system?

Popular additions include smart locks, door sensors, indoor and outdoor cameras, video doorbells, smart thermostats, and leak detectors. These devices integrate with the main alarm system and create a full home or business security setup.

Q: How long does security installation take?

Most installations take a few hours. The technician mounts sensors, tests devices, configures the alarm system, and sets up smart features like app control and notifications.

Q: Can one system support both home and business needs?

Yes. The same smart platform can manage homes, shops, showrooms, workshops, and offices. Markham clients use it to control access, view cameras, manage alarms, and keep track of activity.

Q: Does mobile access work well in Markham?

Mobile access is simple. You can control your system, watch live video, review alerts, manage codes, and check event history from your phone.

Q: Are outdoor cameras useful in Markham?

Outdoor cameras help monitor driveways, porches, yards, and parking areas. They provide motion alerts, clear recordings, and added visibility around your home or business.

Q: What happens when my alarm triggers?

Your alarm sends a real time signal to the monitoring center. The team checks the event, contacts you, and takes steps based on your instructions or the situation at hand.

Q: Are smart systems easy for families to use?

Yes. Touchscreen panels, simple menus, and a mobile app make the system easy to manage. Families can set entry codes, create schedules, and stay aware of activity with minimal effort.

Q: How quickly can Grand Alarms install a security system in Markham?

Most Markham homes and small businesses can be scheduled within a few days, and a standard system is installed in a single visit. Our technician sets up your monitoring and walks you through the mobile app before leaving.

Q: Is your alarm monitoring ULC-approved?

Yes. Every Grand Alarms system connects to a ULC-listed central monitoring station — the highest monitoring standard in Canada — where trained operators verify each alarm event and dispatch help around the clock.

Q: Which Markham neighbourhoods do you serve?

We serve all of Markham, including Unionville, Cornell, Greensborough, Markville, Milliken, Berczy Village, Box Grove, Cathedraltown, Angus Glen and the Markham side of Thornhill.

Q: How much does a home alarm system cost in Markham?

Pricing depends on the size of your property and the equipment you choose. We offer packages with $0-upfront options and provide a free, no-obligation quote for every Markham home and business.

Q: Can you secure both my Markham home and my business?

Yes. We install both residential and commercial systems — alarms, cameras, access control and smart automation — so you can protect your home and your Markham business under one provider.

Markham Home and Business Security Systems

Q: What happens when my alarm triggers?

Your alarm sends a real time signal to the monitoring centre. The team checks the event, contacts you, and takes steps based on your instructions or the situation at hand.

Grand Alarms installs home alarm systems, business security systems, smart cameras, smart locks and 24/7 alarm monitoring for Markham properties.

Get a professionally installed system built for your doors, windows, cameras, app control and real monitoring needs.

– Proudly Protecting Markham –

4.7 Stars

1,288+ HomeStars reviews

A+ BBB Rating

Established GTA security company

ULC-Approved

Professional Monitoring Centre

Markham Service

Homes, condos, and businesses

Smart Security Solutions | Professional Installation | 24/7 Monitoring | Peace of Mind

Home » Service Areas » Markham, Ontario

Markham Security System Packages

Choose a Markham alarm package that fits your property, then customize it with smart cameras, doorbell video, smart locks, smoke detection, water protection and app control.

How much does a home alarm system cost in Markham? Grand Alarms packages range from $32.99 to $59.99 per month, with $0 upfront options and a 3-year price lock. 24/7 ULC-approved monitoring is included on every plan.