The verdict in three sentences
A Dublin building contractor stuck on spreadsheets loses on average 8 hours a week to re-entry and pricing errors. A construction SaaS (20 to 60 EUR/month) is enough to start, but a custom software build (25,000 to 70,000 EUR) pays off once your take-off process, work-item library and site-tracking workflows set you apart. The real question is not the sticker price but the full three-year cost — subscription, limits, and data-entry hours avoided.
Construction SaaS or custom build: the real trade-off
SaaS covers quoting, invoicing and sometimes site tracking for a monthly fee. Custom becomes essential when you want your own work-item library, integrated take-off, or validation workflows tailored to your site managers.
| Criterion (2026 ballpark) | Construction SaaS | Custom build |
|---|---|---|
| Entry cost | 20-60 EUR/month | 25,000-70,000 EUR |
| Go-live | 1-2 weeks | 3-6 months |
| Work-item library | Generic | Custom (+5,000-15,000 EUR) |
| Mobile site app | Depends on plan | +8,000-18,000 EUR |
| Take-off customisation | Limited | Full |
| 3-year cost (1 seat) | ~1,500-2,200 EUR | 25,000-70,000 EUR + run |
| Code ownership | No | Yes |
For a sole trader with 2-3 quotes a week, SaaS wins hands down. From 4-5 users with complex jobs, the subscription gap closes on custom over 3 years.
Breaking down a custom budget in 2026
A custom build is priced by module. Here is a realistic breakdown for a fit-out firm in Dublin.
| Module | 2026 range | Timeline |
|---|---|---|
| Core quoting + invoicing | 25,000-40,000 EUR | 2-3 months |
| Work-item library | +5,000-15,000 EUR | 3-5 weeks |
| Mobile site app (photos, time) | +8,000-18,000 EUR | 4-6 weeks |
| Per-job margin tracking | +4,000-9,000 EUR | 2-4 weeks |
| Reminders and payment schedule | +3,000-6,000 EUR | 2-3 weeks |
| Annual maintenance | 15-20% of build | ongoing |
E-invoicing (increasingly required across the EU) should be built into the core: plan for a compliant format and connection to an approved platform.
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Mini case study
Sean, who runs a renovation firm in Dublin, employs 6 people and issues about 12 quotes a week. On spreadsheets he spends 8 hrs/week pricing, roughly 35 hrs/month. At a loaded hourly cost of 45 EUR, that is 1,575 EUR/month of unproductive time. He invests 42,000 EUR in a custom build (core + work-item library + mobile app). By halving pricing time he recovers ~17 hrs/month, or 765 EUR/month — plus 3 extra jobs won per year thanks to faster quotes. Estimated payback in 26 to 30 months, excluding sales gains.
FAQ
How much does construction quoting SaaS cost in 2026? Expect 20 to 60 EUR/month per user depending on features (take-off, site tracking, mobile app). Over 3 years a single seat runs about 1,500-2,200 EUR.
What budget for custom software? A solid quoting-invoicing core starts at 25,000 EUR and climbs toward 70,000 EUR with a work-item library and mobile site app. Add 15-20% a year for maintenance.
How long to build it? Between 3 and 6 months depending on scope. The core ships in 2-3 months; advanced modules (mobile, job margin) are added afterwards in increments.
What does a work-item library change? It lets you price a quote by pulling from your validated unit rates: twice as fast and free of copy errors. Integrating it costs 5,000 to 15,000 EUR depending on the number of items.
Does custom handle e-invoicing? Yes, provided it is built into the core: the compliant format and connection to an approved platform must be planned from the specification stage.
Let's scope your project. Tell us your quote volume, your priority modules (work-item library, mobile app) and your indicative budget. 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.
