Service · Web development

Custom facility management software.

A FMIS that fits how your buildings and facilities services actually run. Bookings, requests, contract management, energy management and tenant portals, integrated with your BMS, access control and ERP, without bending your processes to fit a standard package.

Custom FMISBMS integrationIoT monitoringTenant portal

When an off-the-shelf FMIS doesn't fit.

Planon, Axxerion, Vastware, MCS and ProsperaCity cover most facilities departments well. For mid-sized work, such as a few office buildings, standard request and booking flows, classic contract management and a simple maintenance calendar, choosing a package is usually the best route. We'd genuinely recommend that if it's the right answer for you. A package goes live faster, has a community around it and ships annual releases you can ride along with.

Custom software becomes worthwhile once your workflows no longer fit the standard model: laboratory or clean-room environments, critical infrastructure, multi-tenant buildings where several tenants want their own request process, or deep integrations with BMS, access control, fire and intruder alarm systems and energy monitoring. We then build a facility management information system designed around exactly that, which grows with you as IoT and AI-driven workflows play a bigger role.

We've been working for facilities departments of offices, production and healthcare sites, educational institutions and property managers with mixed portfolios since 2015. What our software development pages have in common: we only solve what an off-the-shelf package can't do and leave the rest alone. A FMIS doesn't need to redo everything to add value.

Two items that are often kept separate in building management: the Legionella logbook for priority institutions and the inspection logbook for work equipment.

Two inspection obligations that come up in building management: condition assessment under NEN 2767 for the structural state, and scope 10 with thermography for the fire risk of electrical equipment.

Three flavours of custom FMIS.

Depending on the number of buildings, the complexity of your integrations and how much you want to keep in-house. We'll sketch which one fits during the first conversation.

Compact project · fixed sprint budget

Additional module on your existing FMIS

You run Planon, Axxerion or another package and are missing one specific workflow: a tenant portal, a booking experience for flex desks, a request process for a special building, or a dashboard that combines data from the BMS and your package. We build that module and connect it via the API or a shared data platform. The rest of your landscape stays in place, and management remains with your existing supplier.

API integrationSSOBranded portalMobile-first
Mid-sized project · fixed sprint budget

Core FMIS for a single organisation

A custom FMIS foundation for your property portfolio or facilities department. Bookings, a service desk with SLA tracking, contract management, maintenance planning and reporting in one environment. Including integrations with the Building Management System, access control and your ERP for invoicing. Suitable for organisations whose facility processes are so specific that an off-the-shelf package would always chafe, but where the scale is still manageable.

Service deskBookingsContract managementBMS integration
Larger project · fixed sprint budget

Multi-tenant FMIS platform

A mission-critical FMIS for a property owner, manager or facility management company serving multiple clients or tenants. Each tenant gets its own portal, branding and role structure, with central reporting and IoT data from all locations. It distinguishes between what a tenant may configure themselves and what remains central, and includes a layered audit trail so that managers and owners can each account for their own responsibilities.

If you manage buildings with a heating or cooling installation above 290 kilowatts, there is a separate obligation regarding building automation; see software for the BACS obligation. The inspection of the technical room itself is handled through the installation inspection app.

Multi-tenantIoT platformEnergy dashboardsAudit log

Modules we typically build.

Which ones you ultimately take depends on your scope and on which components you already cover with another package. We break the project into phases so the first tier can go live early.

  • Booking & reservationsMeeting rooms, flex desks, parking spaces, hotel rooms or care rooms. With no-show logic, recurring bookings, integration with Outlook or Google Calendar, and check-in via QR code, badge or a quick tap on a tablet at the room.
  • Reports & service deskTicketing with prioritisation, automatic routing to the right supplier or internal team, SLA tracking and escalation. Includes QR-based reporting on site, photo attachments from a mobile app and a dashboard for your service desk coordinator.
  • Contract managementLease agreements, cleaning and maintenance contracts, supplier arrangements and KPI monitoring. Indexation, notice periods and automatic signals for renewals, so no contract quietly rolls over without you having renegotiated it.
  • Energy managementLive data from the Building Management System and smart meters, comparisons between properties, anomaly detection and reporting for CSRD, EED and your own sustainability targets. Trends by room, by installation and by tenant.
  • Cleaning and maintenance schedulingA rostering and task module with quality measurements, photo evidence and linked sensor data (CO2, usage, bin fill levels). Cleaning based on occupancy rather than a fixed schedule often saves around a quarter of the effort.
  • Tenant and user portalA dedicated environment for each tenant or department: submit service requests, view contracts and invoices, make bookings, retrieve documents and register new staff with the appropriate access themselves.
  • IoT monitoringConnecting sensors for temperature, air quality, CO2, humidity and occupancy. Threshold values, alerts and historical analysis per room; via LoRaWAN, Zigbee, Modbus or the supplier's cloud API.
  • IntegrationsIntegrations with Building Management Systems, access control (Salto, Nedap, Paxton), fire and burglar alarm systems, ServiceNow, your ERP and financial packages, and public sources such as BAG and Kadaster for property information.
  • Mobile app for field serviceFor your technical, cleaning or security teams, a dedicated offline-first mobile app with work order handling and photo and signature capture. See also our field service app.

When a custom FMIS is the right choice.

Four patterns in which we support facilities departments and property owners. If you recognise one of them, we'd be happy to talk further. We also like to offer a second opinion in a free introductory call.

Industry-specific

Standard workflows don't fit

Laboratory or clean-room procedures, critical infrastructure (data centres, hospitals), or a production environment where work orders are linked to downtime risk. An out-of-the-box FMIS forces you into a shape that does not fit. We model the steps, statuses and responsibilities as they actually appear in your work instructions, including the exceptions that regulators need to be able to demonstrate.

Depth of integration

BMS, access control and IoT need to come together

You want a fault report to create the right work order in your CMMS straight away, a sensor trigger to schedule a cleaning round, and an access badge event to feed into occupancy data. Our API integrations bring separate systems together into one coherent data flow you can report on and act upon.

Multi-site

Multiple buildings or tenants

You manage dozens of properties, or serve multiple clients as a facility management company. Standard packages become expensive per user and are rarely multi-tenant in the sense you need. A custom platform lets you scale without a licence explosion and without every new client becoming a separate tenant implementation.

Predictive & AI

Smarter maintenance and occupancy

You want your FMIS to do more than record what has happened: to anticipate it. That means predictive maintenance on installations, energy optimisation based on occupancy, and analysis of recurring reports. See also our CMMS maintenance management system for the pure maintenance variant.

Not yet sure about a large project?

Test your idea first: a working prototype in 1 day

With OneDayBuild, we turn your idea into something tangible in one day for €1,150, so you can see whether further development is worth the investment. Decide to go ahead with the full build? Then we credit the full cost.

Explore OneDayBuild →

How an FMIS project runs.

1

Introduction

A conversation in which we map out your portfolio, current tooling and the pain points in your facility flows. We check whether an off-the-shelf package or an add-on module would be a better route — often that is our advice. Only once it is clear that custom adds value do we move on to discovery.

2

Discovery & user research

Workshops with your facility managers, administrators, technical services and end users, plus conversations with a number of tenants or departments. We map the integration points (BMS, access control, ERP, IoT) and the data flows around them. At the end you have a concrete scope, a phasing plan and the first screen flow for the most demanding workflow.

3

Building in sprints

A working build every few weeks. We start with the module that has the greatest impact, often reports or bookings, and expand into contract management, energy management and tenant portals. You and a number of end users test alongside us each sprint, and we build integrations incrementally. A first tier can go live within a few sprints.

4

Rollout & support

Phased rollout per building or tenant, with training for key users and short videos for end users. This is followed by ongoing support: monitoring, security patches, integration changes whenever a vendor updates its API, and further development based on what you see in production. Maintenance can stay with us or move to your own IT team; we have done both before.

Frequently asked questions.

What clients in facilities management and property usually want to know before we begin.

What exactly is an FMIS, and how does it differ from a CMMS?
An FMIS (Facility Management Information System, also known as facilities software or building management software) supports the full range of facilities work: bookings, reports, contracts, cleaning, energy and tenant communication. A CMMS is narrower and focuses on the technical maintenance of installations and assets. In practice the two overlap: our clients often choose an FMIS core with a strong maintenance component. See also our page on a CMMS maintenance management system if maintenance alone is your scope.
Do you replace Planon, Axxerion or another package?
Usually not. For mid-sized facility work, Planon, Axxerion, Vastware, MCS and ProsperaCity are simply good packages, and we often recommend them. We come into the picture when those packages no longer fit: sector-specific flows, deep integrations, multi-tenant experience or a custom tenant portal that goes beyond the standard model. We also often work alongside an existing package as a complement rather than replacing it.
Can you integrate with our Building Management System and access control?
Yes. For BMS integrations we work with BACnet, Modbus or your supplier's cloud API (Priva, Honeywell, Siemens Desigo, Schneider EcoStruxure). For access control we have experience with Salto, Nedap and Paxton. We bring events from the BMS and access control together with your FMIS data, so a fault or occupancy event immediately triggers the right follow-up: a work order, a cleaning round, or an alert to security.
Do you also work with IoT sensors?
Yes. We connect sensors for temperature, CO2, humidity, occupancy, noise level or waste fill level, via LoRaWAN, Zigbee, Modbus or the supplier's cloud API. Sensor data is visualised in dashboards, can trigger threshold-based actions (scheduling a round, sending a notification to a tenant), and is useful for predictive maintenance and energy optimisation. We also advise on which sensors make sense where, as a sensor installation without a clear purpose often generates a lot of data and little control.
Does the FMIS work across multiple sites and tenants?
The FMIS is multi-site from the start and can also run multi-tenant. Each building or tenant has its own roles, branding and flows, with central reporting and analytics for the portfolio as a whole. For facility management companies serving several clients, this is one of the reasons to choose custom development: standard packages quickly become expensive per user and are rarely multi-tenant in the sense you need.
Can we get energy and CSRD reports out of it?
We build energy dashboards based on your BMS data and smart meters, with comparisons between properties, anomaly detection and exports you can use for CSRD and EED reporting. Which metrics you can see depends on what you measure. During discovery we map which data points are available and which you may still need to unlock with sub-meters or additional sensors.
What determines the cost of an FMIS project?
Mainly the number of modules, the depth of the integrations (BMS, access control, ERP, IoT) and the extent to which you want to serve multiple tenants or locations. An add-on module for an existing package is a much smaller project than a custom FMIS core or a multi-tenant platform. During discovery we outline a scope and timeline you can steer by — if necessary with several variants, so you can choose what to do first and what comes later.
How does the implementation of an FMIS run in-house?
We always work in sprints and start small. The first sprint is deliberately limited, often one module, one building and a small group of users, so we can learn early what works in your context and what doesn't. After that we expand modularly. For the rollout per site or tenant, we draw up a runbook with you, including data migration, training and a transition period during which the old and new systems run side by side.
What about security and user management?
SSO via your existing IdP (Azure AD, Google Workspace, Okta), role-based access, audit logging as standard, and encryption in transit and at rest. For tenants or external suppliers we arrange federated login or magic links. On larger projects we carry out a DPIA and schedule a penetration test in the final sprint. For multi-tenant setups we ensure tenant data remains strictly separated, so there is no risk of information leaking between tenants through a misconfigured query.

Talk to us about your FMIS.

A free, no-obligation 30-minute introductory call. We listen to your portfolio and workflows, ask sharp questions and give you honest advice, including if that means looking first at a standard package or a targeted module extension. You can also read about our enterprise software development or a field service app for facilities engineers.

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