Software Solutions for Construction — sites, BOQ, warehouse and invoicing in one system
Software solutions for construction unify per-site project management, bill-of-quantities tracking against real cost, subcontractors, materials warehouse, equipment register, mobile time-sheets and stage-based invoicing in a single custom platform. We build them for construction companies with 10 to 300 staff that already feel Excel and Viber groups steal 3-5 working days per monthly close. Rollout is phased — one site, one painful process first, full cycle from quote to certified work in 6-10 weeks, on desktop and mobile, owned data, no per-seat fees.
Why construction breaks generic ERPs
Construction has four operational realities no off-the-shelf ERP handles well: unpredictable quantities and rework on site, dispersed crews and subcontractors, a warehouse that travels between depots and sites, and invoicing tied to stage of completion — not the calendar month. That is exactly why this is a custom software job, not another subscription.
- ✓Project management per site — a dedicated dashboard per site with schedule, real progress per line item, photo reports, RFIs and change orders, visible to investor, site manager and accounting at the same time.
- ✓BOQ vs actual cost in real time — load the tender BOQ once; the system tracks each line against actual labor, materials and subcontractor cost and alerts on deviation above the threshold you set (typically 5-8%) before it is too late to correct.
- ✓Subcontractor and contract register — contract caps, retainage tracking (5-10%), interim payment certificates, automatic compare between contracted and invoiced — disputed end-of-job settlements disappear.
- ✓Materials warehouse across sites — central depot, on-site stores and per-site inventory, barcode/QR receipts and issues, min-stock thresholds with automatic purchase requests to suppliers.
- ✓Equipment and tool register — excavators, formwork, plate compactors, generators tracked by location, owner, engine hours and maintenance schedule — no machines forgotten on a closed site, no duplicate rentals.
- ✓Time-sheets on mobile — the foreman logs crew hours from the phone on site, with photo and GPS tag; hours feed straight into job costing and payroll without double entry.
- ✓Stage-of-completion invoicing — advance invoices, interim certificates and a final invoice with automatic offset of advance and retention, each line linked to a BOQ item, zero Excel reconciliation.
Who it is built for
Firms with 50-300 staff, 5-25 parallel sites and 20+ subcontractors. Biggest pain: BOQ vs actual cost and closing certificates on time. Typical result — 8-12 days saved per month in the technical office and 6-9% lower cost overruns per site.
Electrical, plumbing, HVAC and facade specialists with 10-80 staff running 8-20 parallel sites across investors. Biggest pain: mobile time-sheets, site-level material tracking and stage-based invoicing. Typical result — payments cleared 2-3 days faster because certificates leave the office without disputes.
Firms that delegate to a general contractor but want live visibility on budget, schedule and quality across 1-6 projects. They get an investor portal with real progress, payment requests, change orders and a snag list, embedded inside their broader ERP development.
How we deliver software solutions for construction
We are not reselling a generic ERP with a construction module — we build a custom platform on your data, your server and your brand. Stack: Next.js + PostgreSQL + Tailwind, with mobile screens shipped as a PWA so foremen install nothing. Rollout is phased to deliver value from week 6, not year 2.
1. Process audit
We spend 2-3 days mapping how quote → BOQ → contract → execution → certificate → invoice actually flows. One day in the office with the technical director and accounting, one day on an active site with the site manager and a foreman. We pick the 3-5 most expensive points and propose a phasing plan.
2. One-site prototype
In 3-4 weeks we ship a working prototype with the most painful process — usually per-site project management plus mobile time-sheets. One real site runs in parallel in the new system and in the old Excel/Viber process, so feedback comes from the field, not slides.
3. BOQ, warehouse, subcontractors
Phase two covers BOQ vs actual, materials warehouse with site-to-site moves, equipment register and subcontractor contracts. We connect to your accounting system and to e-invoicing so certificates and invoices leave from one place.
4. Integrations and roles
We wire API integrations with the bank for payment matching, with telematics on the equipment, with e-invoicing and with investor portals on large projects. Roles — owner, technical director, site manager, foreman, accountant, investor — each sees only what they need.
5. Training, migration, support
We migrate history from Excel and the current software in 1-2 weeks — sites, contracts, subcontractors, stock. Office training in 2 sessions, foremen trained on their own sites, not in a classroom. Retainer for the first 3-6 months covers new sprints, because the real needs surface in the first 90 days of use.
Why Saitami
Prices are fixed in EUR — no per-seat fees, no vendor lock-in. For the full vertical see business software and the custom software service — both share the same platform.
Frequently asked questions
What do these software solutions for construction cover, and what stays in accounting?
We cover everything from quote to payment certificate: BOQ, contracts, sites, warehouse, equipment, subcontractors, time-sheets, stage-based invoices. Ledger postings, VAT returns and payroll stay in your accounting system; we connect via API or file export so invoices and payments flow both ways without double entry.
Does it work on site without internet?
Yes. Foreman mobile screens — time-sheets, photo reports, material issuance, snag list — are offline-first. When the phone catches signal, data syncs and the system flags conflicts. Critical for basements, raw construction and rural sites.
How much does it cost and how long does rollout take?
Phase one — sites, time-sheets and BOQ tracking for a firm with up to 8 parallel sites — starts from €9,800 and ships in 6-10 weeks. Full vertical with BOQ, warehouse, equipment, subcontractors, invoicing and investor portal: €22,000 to €45,000 depending on parallel sites and integrations. No per-seat fees, no percentage of the project.
What about ready ERPs like Odoo Construction or Procore?
They work as long as your processes fit their model. Local specifics — payment certificates, retention, advance tax, e-invoicing, crew-based wages — usually need customisation outside the standard. You either pay 30-60% on top of the license for consultants or bend the process to the tool. A custom build assumes the local context from day one.
Can we start with one site and expand later?
That is exactly the recommended path. First site is the live test — running in parallel with the old process for 4-6 weeks, with real people. Then you add the rest by priority. ROI typically lands at month 7-9 because BOQ tracking and monthly close start paying back from the first certificate.
Ready to close sites, BOQ and invoices in one system?
Send a short brief — parallel sites, team size, current software. Within 72 hours we ship a phase-one estimate with timeline, EUR price and exactly which processes it covers. No lock-in, no hidden fees.
Request a construction-software estimate →Related services: ERP development · custom software · business software