Commercial Door Entry Systems: Types, Costs and How to Choose
A commercial door entry system controls who gets through a door, when, and with what credential. The options range from a buzz-in button at a reception door to a networked system that issues mobile credentials and logs every entry. The right one depends on how many doors you have, who uses them, what your fire code requires and what technology you already run. This guide walks through each of those decisions in the order you will face them.
TL;DR
Door entry systems fall into two groups: buzz-in systems, where staff release the door for visitors, and credential-based access control, where PINs, cards, fobs, phones or biometrics unlock the door automatically.
Standalone locks suit a handful of doors. Networked systems suit growing offices, multiple sites or anyone who needs a central audit trail.
Specify encrypted reader-to-controller communication (OSDP) on any new installation. Older Wiegand wiring can be cloned.
Any lock on an exit path must still let people out in an emergency, and the codes call for specific UL listings on special locking hardware.
Plan for the next three to five years of doors and users, not just today’s count.
Table of Contents
What a commercial door entry system does
At its simplest, a door entry system replaces a mechanical key with an electronic decision. Someone presents a credential, the system checks it against a set of rules, and the lock releases or stays shut. The same event is written to a log: who, which door, what time.
Most systems have three layers. Readers and credentials sit at the door and confirm identity. Controllers hold the permission rules and decide whether to unlock. Software sits above both, where you set schedules, add and remove people and pull reports. If you want the basics in more depth, our explainer on what door access control is for businesses covers the fundamentals.
The door is not always a door. Parking gates, turnstiles, elevators and server-room cabinets can sit on the same system, which is why many businesses start with the front entrance and extend from there.
The main types of door entry systems
Buzz-in and intercom entry
A buzz-in system uses an electric strike or magnetic lock that stays secured until someone inside presses a release button. Visitors ring or call, staff see or hear them, and staff let them in. It is a common fit for clinics, professional offices and small suites where reception is staffed all day.
Its strength is simplicity. Its limit is that it only controls visitors. Employees still need a way in, and nobody is recorded unless you add video.
Keypad and PIN entry
Keypads let anyone who knows the code open the door. They are inexpensive and need no card handling, which makes them popular for back-of-house doors, storage rooms and small shops. The weakness is shared codes: a code passed between coworkers, or never changed after someone leaves, tells you nothing about who actually entered. Systems that assign a unique PIN to each person solve this and give you a usable record.
Card and fob readers
Proximity cards and key fobs are the long-standing standard. Each person carries a credential tied to their record, and you can cancel a lost card in seconds instead of rekeying locks. They are familiar, fast at the door and work well for staff who come and go all day. The tradeoff is that cards get lost, lent and, with older technology, copied.
Mobile credentials
Mobile credentials put the key on a smartphone. Industry sources point out that a phone is typically locked by its owner and people notice quickly when it is missing, so a lost credential gets reported faster than a lost card. Access can also be revoked instantly from the software. Many businesses run cards and mobile side by side during a transition. We compare the two approaches in keycards vs mobile credentials for business.
Biometric readers
Fingerprint and face readers tie access to the person, not an object. They suit high-security rooms where a shared or borrowed credential is the main concern. They need careful enrollment and a clear policy on handling the data. See our guide to biometric door locks for business access for what to weigh.
Quick comparison
Type | Best for | Typical strength | Typical limit |
Buzz-in / intercom | Staffed reception doors, visitors | Simple, staff see who arrives | Does not control or record employee entry |
Keypad / PIN | Back rooms, small shops | Low cost, no credentials to carry | Shared codes weaken accountability |
Card / fob | Offices of any size | Fast, easy to revoke | Lost or lent cards |
Mobile credential | Growing teams, hybrid offices | Harder to lose unnoticed, instant revocation | Needs phone and app adoption |
Biometric | Sensitive rooms | Tied to the person | Enrollment and data-handling policy |
Standalone or networked: the decision that shapes everything else
This choice matters more than the credential type, because it decides how you will manage the system for years.
Standalone locks make decisions at the door with no network or server. Their advantage is resilience: nothing upstream can fail. The cost is administration. Changing who can open a door can mean visiting that door, so standalone systems get hard to manage beyond a few openings, a point made in a technical overview of physical access control architectures.
Networked systems connect controllers to central software. You add a new hire, remove a departing employee or change a schedule once, and every door follows. In a well-designed networked system, controllers keep a local copy of the rules and keep making door decisions even if the server goes offline. Updates and log collection need the server, but opening a door does not.
Cloud-managed systems move that central software off your premises, so you manage doors from a browser. They reduce on-site server maintenance but add an internet and subscription dependency to plan for. Our guide to cloud-based access control lays out what to prepare.
A rough rule: one to three doors and a stable team, standalone can be enough. Four or more doors, more than one location, frequent staff changes or any compliance need for entry records, go networked.
Features worth asking for
Beyond opening doors, the useful features are the ones that save you work or answer questions after an incident.
Audit trail. A searchable record of who entered which door and when. This is often the real reason businesses upgrade from keys.
Schedules. Cleaning crews in the evening, staff on weekdays, a contractor for two weeks only.
Visitor management. Temporary credentials or a registration step at reception so guests are tracked and expire automatically.
Video integration. Linking door events to camera footage lets you click an entry and see who it was. Commercial security guides name video surveillance and intrusion detection as common companions to access control.
Alerts. Notifications for a door held open, a forced door or a tampered reader.
Lockdown and unlock-all. One action to secure or release the whole site.
If you want the larger picture, our commercial access control guide for businesses pulls these together.
Security details that are easy to miss
Two specification choices make a bigger difference than brand names.
Reader-to-controller encryption. For decades, readers have talked to controllers using a protocol called Wiegand, which sends credential data without encryption. According to a professional security-industry specification guide, inexpensive devices can capture those signals and replay them to unlock a door without raising an alert. The same guide recommends requiring OSDP Secure Channel, which encrypts the reader link with AES-128 and adds tamper detection, so the controller is notified if a reader is disturbed. If you are installing new, put OSDP in the specification. If you are keeping older readers, ask whether they can be upgraded.
Network hygiene. The same guide recommends encrypted communication between controllers and management software, administrator roles with logging of every configuration change, a clear firmware update policy that names who applies updates and how often, and a dedicated VLAN that keeps access controllers apart from general office traffic. These are normal asks for any contractor who works across both IT and physical security.
Fire code, egress and accessibility
A door that keeps people out must never trap people in. This is where a commercial installation differs most from a consumer smart lock.
Free egress. Locked doors on an exit path have to let occupants out. Typical solutions are fail-safe locks that release when power drops, plus integration with the fire alarm so locked doors release on activation.
Listed hardware. According to UL Solutions, the 2024 International Building Code (Chapter 10) and the 2024 NFPA 101 require special locking devices, such as sensor-released egress doors, controlled egress doors and delayed egress locking systems, to be listed to UL 294 or UL 1034.
Delayed egress limits. Delayed egress hardware is restricted. A Security Today code review notes a delay of no more than 15 seconds unless the authority having jurisdiction approves 30 seconds, and that the IBC does not allow delayed egress locks in assembly, educational or high-hazard occupancies. That article reflects the 2015 editions, so confirm the current rule for your building.
Local adoption varies. Cities and states adopt different code editions. Colorado jurisdictions, for example, may differ from each other, so the local building and fire officials are the final word.
Accessibility. Entry doors and their hardware must also work for people with disabilities under the ADA Standards for Accessible Design. Operable hardware and reach heights affect where readers and push buttons can be placed.
This is a reason to involve an installer who plans the door as a system: lock, reader, power supply, fire alarm tie-in and exit hardware together. Our piece on commercial door hardware explains how the physical side affects reliability.
How to choose: a practical sequence
Count doors now and in three to five years. Adding an expansion later costs more than sizing the controller correctly at the start.
Sort doors by risk. Front door, server room, storage, executive offices, back exits and the stockroom do not need the same level of control.
Map who uses each door. Employees, contractors, cleaners, deliveries and visitors have different needs and schedules.
List what you already run. Cameras, alarm, visitor sign-in and HR or payroll systems may connect to the access platform, so integration is cheaper to plan than to retrofit.
Pick the credential mix. Cards for people who want simplicity, mobile for flexible teams, PIN or biometric for particular rooms.
Choose the hosting model. On-site server, cloud-managed or standalone, based on how many people will administer it and how much IT you want to maintain.
Compare total cost, not sticker price. Licensing, support contracts, update cycles and training new administrators all add up across the system’s life. A cheap system that charges extra for basic multi-site features can end up costing more.
Confirm the code path. Make sure egress, fire alarm release and listings are part of the design before purchase.
For smaller teams specifically, our guide to the best access control system for a small business narrows the options, and securing office entry without slowing work covers keeping the door fast for staff.
Installation: what a clean job looks like
Door entry work touches walls, ceilings, frames and cable paths, and it happens in a place where people are trying to work. A good installation plan covers:
Cable runs and power. Each door needs reader cabling, lock power and a request-to-exit device. Structured cabling done properly makes later changes much easier.
Door and frame condition. A misaligned door will make even a good lock unreliable.
Scheduling. Work done in stages or after hours keeps the office running.
Commissioning. Every credential type, schedule and alarm response is tested at each door before handover.
Handover. Administrators should know how to add and remove users, read reports and what to do in a power or network outage.
Backup and maintenance. Back up the configuration, plan firmware updates and keep spare readers or credentials on hand.
Our article on office access control system installation goes through the process step by step.
Our perspective
We install and support access control alongside cabling, networks and cameras, so we see door entry as part of a building’s technology, not a standalone gadget. That view changes the questions we ask. Before we talk hardware, we ask how the door is used. Who comes through at 8 a.m., who comes through at 8 p.m., and what happens when the internet is down? A system that looks fine on a spec sheet can still frustrate an office if the reader sits where people queue, or if no one planned the cable path and power supply. We lean toward networked systems with encrypted readers for most commercial clients, because the ability to remove a departing employee in one step, and to see a clear record of entries, is what businesses value most once the system is running. Combining access control with cameras and network design means one contractor coordinates the pieces, with less disruption and fewer finger-pointing moments. We also care about how the job is carried out. Our approach is precise, tidy and as unobtrusive as possible, and we aim to leave your space operational and clean. After installation, our support covers troubleshooting, maintenance and repair, so the system keeps doing its job. Tekmatik
Plan your entry system with Tekmatik
Tekmatik designs, installs and supports access control, CCTV, burglar alarms and the network and cabling behind them for offices and retail sites in Denver and beyond. If you are weighing options, start with a phone consultation to talk through your doors, users and goals. If you want specifics for your building, an on-site assessment is available for a one-off fee of 99 USD, and we walk the doors with you.
Book through our consultation page, or see the full range of security and technology services we offer. Larger or multi-site organizations can look at our enterprise plans.
FAQ
What is the difference between a door entry system and an access control system?
The terms overlap. A door entry system is the broader phrase and can include a simple buzz-in or intercom. Access control usually means credential-based entry with rules, schedules and a log of who used each door. Many businesses start with entry and move to full access control as they grow.
Do I need a networked system for a small office?
Not always. With a few doors and a stable team, a standalone system can work. Once you add locations, have frequent staff turnover or need a record of entries, a networked or cloud-managed system saves time because changes happen in one place.
Can a magnetic lock be used on an emergency exit door?
Only as part of a code-compliant design. Locks on exit paths must allow free egress and release on fire alarm or power loss, and special locking devices are expected to carry UL 294 or UL 1034 listings under the 2024 model codes. Your local building or fire official decides what applies, so confirm it before installation.
Are keycards or mobile credentials better for a business?
It depends on your team. Cards are simple and familiar. Mobile credentials are harder to lose unnoticed and can be revoked remotely. Many businesses run both for a while, which also gives staff a backup if a phone dies.
How long should I plan for when choosing a system?
Look three to five years ahead. Count the doors and users you expect, and the integrations you may want with cameras or visitor management, so the controllers and software you choose will still fit.
Sources
Recommended
Comments