Equipment downtime that costs you a shift’s output, work orders logged on a clipboard and never closed, preventive maintenance that slips because nobody had time. If any of that sounds familiar, you’re somewhere most maintenance teams reach eventually: spreadsheets have stopped coping, but the off-the-shelf CMMS you trialled wanted you to bend your team’s process to fit the software. At ByteGears, we build custom Maintenance Management Software (CMMS) around how your team already works.
We’re a small London consultancy, and our UK-developed CMMS adapts to your maintenance team whether you’re running a factory floor, a portfolio of buildings, or a fleet of service vans. We build bespoke software for UK companies that have outgrown one-size-fits-all tools — and we’ll tell you honestly when a standard SaaS product would serve you better.
Most teams come to us after a clear trigger: a critical failure that cost real money, a regulatory audit that exposed missing inspection records, growth to three or five sites that paper processes can’t track, or a SaaS renewal quote that has crept well past what anyone budgeted for.
Where off-the-shelf CMMS software falls short
Tools like UpKeep, Limble, Fiix and MaintainX are competent products, and for a small team with standard workflows they can be the right call. The friction shows up as you scale and as your processes get more specific:
- Per-user pricing that punishes growth. Most CMMS SaaS charges per seat, somewhere around £20-£55 per user per month. Every technician, supervisor and planner you add increases the bill, and across multiple sites that escalates fast. A 50-user team can find itself paying £18,000-£30,000 a year before integrations.
- Rigid workflows. Approval logic and work order states are largely hard-coded. “If a job is over £5,000 and the asset is business-critical, route it to the finance director” is the kind of rule that vendor workflows struggle to express.
- Process mismatch and team pushback. If the system doesn’t reflect how technicians actually do the job — especially if it forces them back to a desktop after fieldwork — the data quality suffers and people quietly stop using it.
- One-way integrations. Most connectors push data out but don’t pull it back. Costs post to your accounts package, but cost overruns and GL data never flow back into the CMMS, so the asset record is never the full picture.
- Reporting that doesn’t answer your questions. Pre-built dashboards rarely match how you actually want to see MTTR, downtime or spend, and proper custom reports are often locked to the enterprise tier or need vendor consultancy.
- Weak UK fit. Several of the larger products are US-built. UK data residency, support inside GMT hours, GDPR data processing agreements and standards like SFG20, PUWER and LOLER are often an afterthought.
So you end up with workarounds, more training than you bargained for, escalating seat costs, and maintenance data spread across the CMMS, your accounts system and a few surviving spreadsheets.
What we build instead
We build a CMMS shaped around your assets, your sites and the way your team actually closes a job — without the per-seat meter running in the background.
We map your process first
We sit down with your maintenance team and document how work really flows: how a request comes in, who triages it, how a technician picks it up in the field, how parts get booked against it, how it gets signed off. The software should fit the job, not the job fit the software.
No per-user licensing
You pay for the build once and run it on fixed hosting — typically a few thousand pounds a year — no matter how many technicians, supervisors, contractors or planners use it. Growth stops being a cost penalty.
Integration that goes both ways
The architecture is API-first, so it connects to what you already run — Sage, Xero or QuickBooks for accounting, SAP, Oracle or Microsoft Dynamics for ERP, plus inventory systems and in-house databases. Where it matters we build proper two-way sync so your asset register stays a single source of truth instead of three slightly different lists.
Workflows and approvals that match your org
Conditional routing, cost-threshold approvals, branching inspection logic, role-based actions — built to your rules rather than squeezed into a vendor’s fixed states.
Built for UK rules
We build compliance with British standards into the system rather than bolting it on afterwards:
- PUWER and LOLER inspection records and certification tracking
- Immutable audit trails for who did what and when
- Data retention aligned to the usual 6-7 year windows for tax and compliance
- SFG20-aligned planned maintenance categories for facilities work
- UK GDPR, with hosting in UK data centres
Mobile-first, and genuinely offline
Technician tools are designed for the field from the start: work orders, asset history and checklists on a phone, with photo and signature capture that works with no signal and syncs when connectivity returns. No trip back to a desktop to log the job.
Room to grow
The design is modular, so adding IoT sensor feeds, condition-based triggers or deeper analytics later is a planned extension, not a rebuild.
Support from people you can reach
Our London team handles implementation and ongoing support during UK business hours. No offshore call centre, no 24-48 hour email queue.
Features and modules we typically build
Every CMMS we build is assembled from the modules below, shaped to what you actually need. We rarely build all of it at once — see the project process below.
- Asset register — one record per piece of equipment with make, model, serial, location, cost, warranty expiry, criticality and full service history
- Work order management — create, triage, assign, track and close, with parts, labour hours, photos and notes attached
- Request intake — a portal or QR-code request form so site staff and managers can raise issues that flow straight into triage
- Preventive maintenance scheduling — work orders generated automatically from time, usage or condition triggers
- Spare parts and inventory — stock levels per part, reorder alerts, supplier links and parts booked against work orders
- Mobile workforce tools — offline-capable technician apps with checklist completion and photo/signature capture
- Reporting and dashboards — live MTTR, MTBF, PM compliance, downtime and maintenance spend, with reports built to your questions
- Condition monitoring — architecture ready to take in equipment sensor data from platforms like Samsara or Monnit
- Document management — secure storage for manuals, MSDS, safety certificates and compliance paperwork against each asset
- Role-based access control — permissions for technicians, planners, managers and outside contractors
- Compliance tools — certification expiry alerts, inspection forms and audit trails ready for regulatory or insurer review
- Vendor and contractor management — third-party work, service contracts and SLA tracking in one place
How the project runs
Industry research suggests a large share of CMMS rollouts miss their timeline, overrun budget or fail on adoption. The usual culprits are predictable: underestimating data cleansing, trying to configure every edge case at once, weak training, and a system that doesn’t match technician reality. We run projects to avoid exactly those traps.
1. Discovery and process mapping (3-4 weeks)
We interview technicians, planners and managers to document how work really flows, where it breaks, and what has to integrate with what. We agree a deliberately tight scope for phase one.
2. Core build and MVP (first 4-6 weeks of development)
We get a usable core in front of you quickly: asset register, work order create-assign-close, the technician mobile app, and basic reporting. A pilot site can be live on this before the full system is finished.
3. Phased build-out (development continues)
Preventive maintenance scheduling, spare parts inventory, dashboards and integrations are layered on in short cycles with a demo every fortnight, so you steer as we go and adoption builds with the system.
4. Data migration, testing and rollout (2-4 weeks)
Data cleansing is usually the largest single piece of work — consolidating duplicate assets, standardising names and locations. We migrate recent, useful records rather than every historical log, then roll out site by site.
5. Training and support (ongoing)
Hands-on training for each role — technicians, planners, admins — plus documentation, with 12 months of support included so people actually adopt the system.
Most CMMS projects deliver a usable core in 4 to 5 months. Heavy ERP integration or large data migrations push that towards 6-7 months.
What it costs, and why it’s worth it
A custom build costs more up front than a SaaS subscription. The comparison that matters is total cost over three to five years, and for a growing team the maths usually turns in your favour:
- SaaS keeps charging per seat. A 50-user team on a mid-tier per-user CMMS commonly spends £18,000-£30,000 a year, and that climbs every time you add a technician or open a site.
- A custom build runs on fixed hosting. Once built, ongoing cost is typically a few thousand pounds a year for UK hosting plus an optional support contract — regardless of how many people use it.
- You own it. Full control of the source code and your data, no vendor lock-in, no forced migration when you outgrow a SaaS tier.
- No hidden integration bills. SaaS vendors often quote custom integrations and SSO as separate paid work; with a custom build the integrations you need are part of the system.
A custom CMMS is not the right answer for everyone. If you have a small team, standard workflows and the usual integrations, an off-the-shelf product is cheaper and faster, and we’ll say so. A custom build tends to pay off once you are past roughly 40-50 users, need workflows or integrations the vendors won’t sensibly support, or are replacing an ageing enterprise system where migration and retraining costs are already high.
We’ll give you a clear, fixed scope and price after a free consultation, sized to the modules and integrations you actually need.
Industries we work with
Custom CMMS makes sense anywhere physical assets are central to the operation. A few sectors where the bespoke argument is strongest:
- Manufacturing — PM schedules aligned to production calendars, work orders raised automatically from downtime events, failure history feeding root cause analysis, and technician certification tracking so only qualified staff close specialist jobs.
- Facilities and property management — multi-site building systems, contractor coordination, condition surveys and planned maintenance structured around SFG20 task categories with cost-per-area reporting.
- Healthcare — calibration and servicing logs for medical devices, PM schedules for life-safety equipment, device recall tracking and audit trails ready for CQC inspection.
- Hospitality — kitchen equipment, HVAC and plumbing across a property portfolio, with front-of-house staff logging guest-facing faults straight from a phone.
- Retail — centralised refrigeration and store-equipment maintenance across many sites, with cost allocated back to each store’s P&L and benchmarking across the estate.
- Transport and logistics — fleet and workshop maintenance, with PM triggers from odometer and runtime data.
- Utilities — asset criticality classification, regulatory compliance documentation, and integration with SCADA or grid monitoring for real-time asset health.
- Construction — plant and machinery maintenance with PUWER and LOLER inspection regimes built in.
- Education and local government — lifecycle management for ageing buildings and infrastructure, work order approval chains for budget sign-off, and reporting for facility and safety audits.
Because it’s built for you, the system can carry the regulations, terminology and workflows specific to your sector instead of a generic template.
Common Questions About Custom Maintenance Management Software (CMMS)
When does a custom CMMS make more sense than an off-the-shelf one?
If you have a handful of users, standard workflows and the usual integrations (Xero, QuickBooks, Google Calendar), a SaaS CMMS like Limble or MaintainX is usually the sensible choice. A custom build earns its keep when per-user pricing starts to bite at 40-50+ users, when your inspection or approval workflows don't fit a vendor template, or when you need deep two-way ERP integration the vendor won't quote sensibly.
How does the cost compare to SaaS over time?
A custom CMMS costs more in year one. The maths usually changes by year two or three: per-user SaaS keeps charging for every technician, supervisor and planner you add, while a custom build runs on fixed hosting of a few thousand pounds a year regardless of headcount. For a team of 50+ users, five years of mid-tier SaaS often comes to more than the build plus its running costs.
What's the typical development timeline?
Most CMMS projects deliver a usable core in 4 to 5 months. We aim for a working MVP — work orders, asset register and the technician mobile app — within the first few weeks, then layer preventive maintenance, inventory and integrations on top. Heavy ERP integration or large data migrations push the timeline towards 6-7 months.
Can you integrate with our ERP, accounting and inventory systems?
Yes. The system is API-first, so it connects to ERP (SAP, Oracle, Microsoft Dynamics), accounting (Sage, Xero, QuickBooks) and inventory systems. We can build proper two-way sync — work order costs posting to the GL, asset records staying consistent across systems — rather than the one-way push most SaaS connectors settle for.
Does it handle UK maintenance compliance and standards?
We build compliance into the system rather than bolting it on: PUWER and LOLER inspection records, certification expiry alerts, immutable audit trails, and data retention aligned to the usual 6-7 year windows. For facilities work we can structure planned maintenance around SFG20 task categories. Data is hosted in UK data centres to keep you on the right side of UK GDPR.
How do you handle updates, support and ownership?
You own the source code and the data. Every build includes 12 months of support and updates. After that you can take a flexible support contract, or we can hand over to your own IT team. There is no per-seat licence and no vendor able to switch the system off.
Why do so many CMMS rollouts fail, and how do you avoid it?
Most CMMS rollouts stumble on the same things: underestimating data cleansing, trying to configure every edge case on day one, weak training, and a system that doesn't match how technicians actually work. We tackle this with a phased rollout, an honest scope, realistic data migration (recent records, not every historical log), and hands-on training for technicians, planners and admins.