Why Don't My Apartment Building's Systems Work Together? And How to Fix It

The short answer: your building's systems don't work together because they were bought one at a time, each to solve one problem. The lock system, the intercom, the Wi-Fi, the thermostats and the property management system (PMS) each work well on their own, but nothing connects them, so your site team becomes the connection. The fix is not to replace everything. It is to add an operating layer that takes events from the PMS and turns them into actions across the systems you already own.

Why does this happen?

Multifamily technology is usually bought category by category, property by property and vendor by vendor. Each purchase makes sense at the time. A new access control system fixes key problems. A video intercom fixes visitor problems. Smart thermostats fix energy problems. But every system keeps its own list of residents, its own permissions and its own app, and none of them knows when a lease starts or ends.

The result is not a technology shortage. Most properties already have plenty of technology. The result is a building made of islands.

What does it cost when systems don't talk?

• Staff become the integration. A move-in means updating the PMS, then the access system, the intercom directory, the Wi-Fi portal, the amenity calendar and the package system, one at a time.
• Things get missed. Keys that still work after move-out, Wi-Fi accounts that never get created, vacant units left at full heat or cooling.
• Residents juggle apps. One app for the door, another for packages, another for maintenance.
• Every property is different. Staff who move between buildings have to learn a new process each time.

Does adding an integration fix it?

Not always. Many integrations only move data from one system to another. If a person still has to finish the job by hand after the data arrives, the problem hasn't been solved. Integrations move data. Interoperability moves the building: an event in one system reliably causes the right action in another, with the right person, the right permissions and a record of what happened.

How do you get apartment building systems to work together?

1. Keep the PMS as the system of record. It already knows who lives in each unit and when their lease starts and ends.
2. Use PMS events as instructions. A new lease, a transfer or a move-out should trigger the access, Wi-Fi, climate and service changes that follow, automatically.
3. Connect the systems you already own. Replace equipment only where it genuinely can't be supported.
4. Give staff and residents one place to work. One operations view for the site team, one app for residents.
5. Make it repeatable. Use the same workflows, roles and permissions at every property, even when the hardware differs.

What does it look like in practice?

At Regius Square, a 124-unit community in Salt Lake City managed by Asset Living, dormakaba smart locks, Interel thermostats, PDK access control and ButterflyMX intercoms were brought together under one platform and one resident app. When a resident books an amenity, door access updates for that time window automatically. The property reported 43% fewer resident complaints after deployment. That is one property's result. Read the Regius Square case study.

Where Della OS fits

Della OS is the operating layer for multifamily buildings. Your PMS runs the business. Della runs the building: Occupancy Sync reads lease events from Yardi, Entrata, RealPage, AppFolio or ResMan and coordinates access, Wi-Fi, climate, amenities, packages, maintenance and resident services across the hardware a property already has. It works with more than 40 building systems and is deployed by certified integrator partners.

Frequently asked questions

Why don't my apartment building's systems work together?

Because each system was bought separately to solve one problem, and each keeps its own resident list and permissions. Nothing connects them to the lease, so staff connect them by hand.

Do I have to replace my existing systems to connect them?

Usually not. A building operating layer connects supported systems you already own and recommends replacement only where equipment can't be supported.

What is the difference between integration and interoperability?

Integration moves data between systems. Interoperability means an event in one system reliably causes the right action in another, with the right permissions and an audit trail.

What should connect my building systems?

Ideally your PMS events. The PMS already knows who lives where and when, so move-ins, transfers and move-outs can drive access, Wi-Fi and services automatically.

Book a walkthrough to see Della OS on one of your own properties, or browse the systems Della OS works with.