Know your margin. On every job. In real time.
From the first quote to the final retention release — Odoo configured for general contractors, MEP firms and specialty trades who need to protect margin on every site.
The challenges we solve
Real margin killers we hear every week from construction and trades companies.
You discover the loss after handover
The job looked profitable in the quote. By the time you close the accounts, labour overruns and untracked purchases have eaten the margin. You find out two months too late to act.
Progress billing done manually
Your office manager builds each situation in Excel, calculates retentions by hand, and chases the accountant for the VAT rate. Three hours of work per invoice that Odoo generates in four clicks.
Subcontractors off the books
Subcontractor costs arrive as PDF invoices with no link to the job, no comparison to the agreed rate, and no retention tracking. Your actual cost per site is a guess.
Purchasing with no job reference
Materials are ordered by phone, delivery notes pile up on site, and nobody codes them to a job until month end. By then three sites have been cross-charged the wrong costs.
Quotes that take a week
Your estimator rebuilds unit rates from scratch on every tender. No reusable library, no version history, no e-signature. The client has already signed with someone else.
Migration from Batigest or Onaya was never finished
You moved to a new system two years ago. Half the team still uses the old one for reports. The data is split, the KPIs are unreliable, and nobody trusts the numbers.
What we configure in Odoo
Every module connected to the job — from quote to final account.
Estimating & Quoting
Unit rate libraries, trade-specific templates, multi-lot quotes with options and variants, e-signature built in.
Job Costing & Margin
Budget vs actual per job, per trade, per cost type — updated live as purchases and timesheets are posted.
Site Planning & Resources
Team scheduling by skill and availability, subcontractor slots, equipment booking, Gantt view shared with site managers.
Progress Billing
Situations generated from declared progress by lot. Retention calculated automatically. TVA BTP applied. Sent to client in one click.
Subcontractor Management
Subcontract orders linked to job and lot, agreed rate vs invoiced rate comparison, retention tracking, payment certificate workflow.
Aftercare & Warranty
Snag lists, defect period tracking, retention release schedule, maintenance contracts post-handover.
Systems we migrate from
We have done it before — with full data integrity validation.
Batigest → Odoo
Jobs, quotes, supplier catalogue, customer accounts and open invoices migrated and validated before we touch your live system.
Onaya → Odoo
Full project history, cost codes, subcontract register and billing schedules extracted and mapped to Odoo's project structure.
Chorus Pro → Odoo
Public sector billing workflows reproduced in Odoo with e-invoicing compliance and Chorus Pro integration maintained.
Sage Bâtiment → Odoo
Chart of accounts, analytical axes per job, supplier and client balances migrated with a reconciliation report delivered before go-live.
Excel + paper → Odoo
The most common migration we do. We structure your data, clean it, import it, and train your team in the same week.
Multi-system → Odoo
Estimating in one tool, accounting in another, planning in spreadsheets. We unify everything — one system, one truth.
The CHANTIER Method
Our proprietary 5-step deployment for Odoo Construction & Trades. Every client. Every time.
Job Audit
We spend half a day with your estimator, your site manager, and your office manager — separately. We map how a job moves through your business from tender to final account: where the data is, where it breaks, and where the margin disappears. We leave with a written process map signed off by your team before we open Odoo.
Chart of Accounts & Analytical Structure
We configure your Odoo analytical axes before anything else: one axis per job, one per cost type, one per trade where needed. Every purchase order, timesheet and subcontract invoice will hit the right job automatically — not retrospectively at month end. This step takes two days and saves you two hours every week for the next ten years.
Quote-to-Bill Workflow
We build your estimating templates with your real unit rates, configure progress billing to generate situations from declared completion percentages, and set up retention tracking and release schedules. We test every scenario with a real job from your history — not a demo project.
Subcontractor & Purchasing Integration
Every subcontract order is linked to a job and a lot. Every purchase order references a site. Delivery notes are matched to orders. Supplier invoices are three-way matched before payment is authorised. Your actual job cost is visible in real time — not at month end.
Go-Live & 30-Day Review
Go-live happens on a Friday. By Monday your team is billing, ordering and tracking on Odoo. Thirty days later we review your first real job data — budget vs actual, billing delays, subcontractor cost accuracy. We deliver a written report. Included. Not an add-on.
What you get
What our construction clients see within the first 90 days of go-live.
- Margin visible per job in real time — not two months after handover
- Progress billing generated in 4 clicks — not 3 hours in Excel
- Every purchase and subcontract cost coded to a job at point of entry
- Subcontractor retentions tracked and released automatically
- Quote library built — next tender takes hours not days
- One system from estimate to final account to accounting
What we don't take on
- Residential developers or property managers. Odoo is not a property management system and we will not pretend otherwise.
- Projects where the client wants Odoo configured before their job cost structure is agreed. We define the analytical axes first — always.
- Companies with fewer than 10 employees and one site at a time. The investment does not make sense at that scale — and we will tell you that on the first call.
"We were running Batigest for billing and Excel for everything else. AldenSync migrated us to Odoo in 10 weeks. We now see the margin on every job before it closes — not after."
Frequently asked questions
Can Odoo really handle construction billing — situations, retentions, TVA BTP?+
Yes — natively. Odoo generates progress billing situations from the completion percentage you declare per lot. Retention is calculated automatically at the rate specified in the contract, tracked across all situations, and released on a schedule you set. TVA at the applicable BTP rate is applied per line. The situation is sent to the client as a PDF or via e-invoicing without leaving Odoo.
How do you handle subcontractors who invoice late or over the agreed rate?+
Every subcontract in Odoo has a committed amount and a retention rate. When the subcontractor's invoice arrives, Odoo flags any deviation from the agreed rate before the invoice is approved. You see committed vs invoiced vs paid per subcontractor, per job, in real time. Late invoices show as open commitments on the job margin report.
We migrated from Batigest two years ago and still have data in the old system. Can you fix this?+
Yes — this is one of the most common situations we deal with. We extract your historical job data from Batigest, map it to Odoo's project and analytical structure, validate it in staging, and import it with a reconciliation report that confirms every record. Your team uses one system from day one of go-live.
How long does an Odoo deployment take for a construction company with 50 employees?+
A full deployment — estimating, job costing, purchasing, subcontractor management, progress billing and accounting — takes 8 to 12 weeks for a company of that size. We always start with the analytical structure and one live job as a pilot before rolling out to the full team. The pilot job is usually running in Odoo within 3 weeks of kick-off.
Do you integrate Odoo with Chorus Pro for public sector billing?+
Yes. We configure Odoo's e-invoicing module to generate Chorus Pro-compliant invoices directly from your progress billing situations. The integration covers structured invoice format, SIRET validation, and transmission status tracking within Odoo.
Our guarantee
If any billing workflow — situations, retentions, or subcontractor matching — does not work as specified after go-live through any fault of ours, we fix it at no charge within 2 business days. Every engagement starts with a Job Audit. We do not touch Odoo until we understand how your jobs are structured.
Ready to see your margin before the job closes?
You are not paying us to install Odoo. You are paying us to make it work — on go-live day and three years after.
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