The verdict in three sentences
For a lift contractor maintaining 2,400 lifts under contract with 45 engineers, the real issue is not software but proof of response times required by LOLER, BS EN 81 and client contracts. A custom web app at GBP 47,000 to 81,000, delivered in 5 months, beats a generic field service SaaS within 3 to 4 years and matches your actual on-call rules. If you have fewer than 15 engineers or no penalty clauses, stay with an off-the-shelf SaaS.
What regulation and contracts actually require
LOLER requires thorough examination of passenger lifts every 6 months, and BS 7255 sets maintenance expectations. Comprehensive contracts with housing associations and property managers in London add response targets and service credits. Without reliable timestamps, you lose disputes.
| Obligation | Typical 2026 requirement | What the app must record |
|---|---|---|
| Routine maintenance visit | Every 4 to 6 weeks | Date, engineer, signed checklist |
| Trapped passenger release | Under 1 hour, 24/7 | Call time, departure, arrival on site |
| Breakdown, no entrapment | Back in service within 4 to 24 h per contract | Diagnosis, parts, return-to-service time |
| LOLER thorough examination | Every 6 months | Insurer inspector report, defects closed |
| Service credits on comprehensive contracts | GBP 40 to 250 per hour of delay | Automatic actual response calculation |
| Lift logbook | Available to the owner | PDF export per lift |
A report signed on a tablet, geolocated and timestamped, settles most service credit disputes. That is the first return on investment.
Custom build or field service SaaS: the numbers
Field service SaaS tools usually charge per engineer per month. They handle scheduling well, but lift-specific on-call rules less well: rotation by area, escalation if the on-call engineer does not answer within 10 minutes, contract-specific response calculations.
| Criterion | Field service SaaS | Custom web app |
|---|---|---|
| Upfront cost | GBP 2,500 to 8,500 setup | GBP 47,000 to 81,000 |
| Recurring cost | GBP 50 to 75 per engineer per month | Support GBP 770 to 1,280 per month + hosting GBP 130 to 260 |
| Annual cost for 45 engineers | GBP 27,000 to 40,500 | GBP 10,800 to 18,500 |
| On-call and escalation rules | Partial, often an add-on | Matches your real rota |
| Service credits per contract | Rarely native | Native, per client and per lift |
| Lift alarm telemetry integration | Paid connector or missing | Alarm unit APIs integrated |
| Data ownership | Vendor hosting | UK hosting, full ownership |
Over 5 years, SaaS totals GBP 135,000 to 203,000, the custom app GBP 101,000 to 174,000 including build. The gap widens as you hire.
Scope of a V1 deliverable in 5 months
| Module | Content | Share of budget |
|---|---|---|
| Assets and contracts | 2,400 lifts, clients, service levels | 15 % |
| On-call rota | Rotations, areas, SMS and call escalation | 15 % |
| Call handling and dispatch | Central intake, lift alarms, nearest engineer | 20 % |
| Engineer app (offline PWA) | Work orders, photos, parts, signature | 25 % |
| Reports and service credits | Actual times, client export, logbook | 15 % |
| Management dashboard | Response compliance, repeat faults | 10 % |
Typical timeline: 3 weeks of scoping, 12 weeks of development in 2-week sprints, a 3-week pilot in one area (for example Camden and Islington), then full rollout. The app works offline in lift shafts and basements, a point often overlooked.
Mini case study
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James, technical director of an independent lift contractor in London, currently loses GBP 18,400 a year in disputed service credits for lack of timestamped proof, and his engineers spend 25 minutes a day on paper reports. With the app: 45 engineers x 20 minutes saved x 220 days = 3,300 hours a year, roughly GBP 99,000 at GBP 30 per loaded hour. If service credits drop by 70 %, he recovers another GBP 12,900. For a GBP 68,000 budget, payback comes in under 8 months, even valuing only half the time saved.
FAQ
How much does an on-call app for a lift contractor in London cost in 2026?
Budget GBP 47,000 to 81,000 for 2,000 to 3,000 lifts and 30 to 60 engineers. Ongoing support runs GBP 770 to 1,280 per month depending on change volume.
Can engineers work without signal?
Yes, the app is an offline PWA that syncs reports as soon as signal returns. Photos are compressed to about 300 KB to limit data usage.
Can lift alarms be connected?
Most autodialler units expose an API or event feed. Integration typically costs GBP 3,400 to 7,700 depending on how many manufacturers are in the portfolio.
How long until we are live?
Five months for V1, including a 3-week pilot in one area. Migrating 2,400 lifts from spreadsheets or the old tool takes about 2 weeks.
Do reports hold up as evidence?
A timestamped, geolocated report e-signed by the client or caretaker is strong evidence in a dispute. The audit log keeps every change for 5 years.
Let's scope your project. Send us your lift count, engineer headcount and standard contracts, and we will price a V1 at GBP 47,000 to 81,000 with a 5-month plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
