Start with 190+ built-in modules, then build or install your own. From estimating to BIM to the field, with an open API, webhooks and a module builder so the platform becomes exactly the software your business runs on.
A bill line opens into the resources it was priced from, each carrying its own class and its own currency. Turkish supply stays in lira, the admixture in euros, under one dollar total.
Bill of Quantities
4D Schedule · 5D Cost
5
A price library, not a price list
Every rate carries a minimum, an average and a maximum, and says how many estimate lines cite it.
Product & Resource Catalog
Bill of Quantities
6
The cost base under the estimate
Browse unit and composite rates by region and catalogue, or keep your own, and pull a rate with the labour, material and equipment behind it straight into the bill.
Budget, committed, actual and forecast on one screen, with earned value read off the same data rather than typed into a separate sheet. It will tell you the performance index you need from here to land on budget.
5D Cost Model
Cost-Value Reconciliation
8
Time built from the same bill
The programme is generated from bill positions and stays linked to them, so a quantity that moves takes the dates with it.
4D Schedule
4D model · Earned value
9
What could still move the number
Each risk priced and rated on the same project, so the contingency you carry is a sum of named exposures rather than a percentage on the bottom line.
Every query carries its discipline, its due date and whose move it is, and an answer that arrives with cost in it turns straight into a variation.
Requests for Information
Variations · Submittals · BIM viewer
11
Acceptance leaves a record
Each inspection carries its checklist, its result and its date, so a failure becomes a task with an owner rather than a note on somebody's phone.
Quality Inspections
Punch list · NCR · Handover
12
The money view a finance director asks for
Cost against value by cost head, with forecast and margin on every line, over a cash-flow curve that runs to completion. One head is showing a negative margin, which is rather the point of running the reconciliation.
Cost-Value Reconciliation
Cash flow · Payment applications
Back to 01. A revision arrives and the same four stages run again, on the same data.
Four roles run the cycle above. 19 more run their own part of it, and each one gets a different set of modules.
190+ modules. Whatever your process is, it is in here.
Estimating, tendering, BIM, quantities, programme, quality, safety, cash flow, site. Switch on what your job needs, write your own.
Download
Get the real desktop app, free.
A native desktop build for Windows, macOS and Linux. One installer brings the full platform with its own built-in database, so there is nothing else to set up. Free, open source, and your data never leaves your disk.
Detecting your platform…
One installer, nothing else to set up
Data stays local
First launch ~60s, then fast
Open source, AGPL-3.0
Windows
Detected
Windows 10/11 - 64-bit installer
x64.exeWin 10+
Download the installer
Run it and accept the prompt
First launch takes about a minute, then the app opens
$curl -fsSL https://openconstructionerp.com/install.sh | sh
Reading latest release…
pip · Docker
One command and you are running
Python 3.12+DockerSelf-host
Install, then run
$pip install openconstructionerp
One line, app plus database
$docker compose up
PyPI · Docker Hub
One click, and the whole thing is in your language
Interface, catalogues and reports switch language together, so a designer in Warsaw and a site manager in Lyon read one project in their own languages. Try it here.
What you actually get
The whole platform, not a trial
Estimating, takeoff, scheduling, documents, quality and CAD/BIM import, all in the download. Cost data for 40+ markets and 44 interface languages come with it. No paid tier, no seat count.
It runs on your own machine
No account and no cloud in the middle. Projects stay in a folder on your own disk, and everything keeps working with the network switched off.
Nothing to maintain
Database, server and interface ship as one program. Updating means running the next installer, and removing it leaves only your data folder.
System requirements
64-bit Windows 10 or 11, macOS 10.15+ on Apple Silicon, or a current Linux. 2 GB of disk and 4 GB of memory are enough.
The first minute
The first launch takes about a minute, later ones seconds. A demo project is preloaded, so you can read a full estimate before importing yours.
The platform sits at the open centre of your software. Open formats, a documented API and webhooks keep estimate, model and finance in step, and nothing is trapped.
Bills, cost breakdowns and claims go straight into finance, no re-keying.
ExcelSAPDATEVXero
Excel / CSVJSONREST API
BIM and CAD authoring
Models and drawings come in from your authoring tools, review issues go back.
Revit®AutoCAD®MicroStation®
IFCDWG / DGNBCF
Document and cloud storage
Drawings, contracts and reports stay in sync with your document store.
SharePointGoogle DriveDropboxNextcloud
REST APIWebhooks
BI and reporting
Live project figures feed your dashboards instead of being pasted in.
Power BITableauMetabase
ParquetJSONREST API
Project scheduling
Activities and dependencies move both ways between schedule and estimate.
MS Project
XERXMLCSV
Automation and webhooks
Project events start your workflows, and your workflows call the API back.
n8nZapierMake
WebhooksREST API
Trademarks belong to their owners; shown to indicate compatibility.
No lock‑in, by design.
Every figure is exportable, the formats are open, and the same documented API that runs the app
is open to you. Your data stays yours - you can always take it with you.
Site & fieldAnswer an RFITurn a question from the working face into a tracked request, drive it to the…39 minOpen
Commercial & contractsTurn a change into a paid variationCapture a scope change while it is fresh, price it as a contract variation on…311 minOpen
Handover & lifecycleHand over and close outFinish the job cleanly: work the punch list to zero, confirm every inspection…514 minOpen
Planning & controlsBuild the baseline programmeTurn the agreed scope and the priced BOQ into a baseline programme: list the activities, set…512 minOpen
Commercial & contractsPrepare an interim payment applicationBuild the monthly interim application: measure the work done to date, value it against the…510 minOpen
Tendering & procurementIssue a procurement and buying scheduleTurn the BOQ and the programme into a buying schedule: list the packages to buy, set lead times…511 minOpen
Quality & safetyRun a safety walk and log observationsCatch the hazards before they hurt someone: walk the site against a checklist, raise the unsafe…37 minOpen
Handover & lifecycleSet up the asset register for FMBuild the asset register the operator will run the building from: capture the installed assets…411 minOpen
What ships in the box on the current release. Cost data, CAD formats,
modules and licensing, with the headline figures in one place.
cost database
0+
ready-to-use cost items across trades and assemblies.
updated monthly
CAD formats
0
native CAD ingest, DWG, RVT, IFC, DGN, DXF and GLB into one canonical format.
DWG · RVT · IFC · DGN · DXF · GLB
modules
0+
plug-in modules covering the full site workflow, projects, BOQ, takeoff, tenders and more.
add & remove like packages
licensing
0%
open-source core under AGPL-3.0. No vendor lock-in. Your data stays yours.
AGPL-3.0 + Commercial
Built for your trade
One platform, shaped to how you build.
Pick the kind of company you run and the platform switches on the modules that role needs, wired together in one database. Hover a profile to see its module honeycomb light up.
Every profile keeps the always-on platform core: projects, the cost database, resource catalog,
assemblies, dashboards and admin. Profiles never lock anything away, they simply lead with the modules
that matter most for the work, and you can add or drop any module later.
Engineers, construction firms and consultancies exploring OpenConstructionERP
A snapshot of the construction, engineering and infrastructure teams that signed up to try OpenConstructionERP or have worked with DataDrivenConstruction's open tools - across Europe, North America, MENA, APAC and Oceania.
Tegrity ContractorsPW Pole BarnsDigitarhOverzichtCSTBMideaForidaYutopiasMatritsVirtuzaTegrity ContractorsPW Pole BarnsDigitarhOverzichtCSTBMideaForidaYutopiasMatritsVirtuza
v18.5.0A Background services panel that shows what the platform keeps loaded and lets an administrator switch each service off, schedules imported from Excel or CSV, and contract payment plans that follow schedule milestones.2026-10-10
v18.4.0Project records that lead to each other, from an RFI to a change order to the budget line it lands on, a check of contract against measured quantities in post-calculation, and standard payment terms for ten countries.2026-10-04
v18.3.0The 4D schedule keeps assignees and where new activities go, deleted projects stay out of every list and rollup, and every country pack is held to the same validation and pricing checks.2026-10-02
Trust · standards & assurance
No black boxes. No lock‑in.
Plain facts you can check yourself: an open licence, open formats and your data on your own server.
Self-hosted, your data stays yoursProjects, drawings and costs live in your own database.
No telemetry by defaultNothing is phoned home. AI is opt-in and can run on your own models.
Open standards, read and writtenGAEB, BC3 and BCF in and out. DIN 276, NRM and MasterFormat built in.
GDPR-ready by designExport and deletion built in. You stay the data controller.
44 interface languagesSwitch the whole interface in one click.
open cost data
Nine cost bases. Every position built from resources.
Behind every rate sits its recipe: the labour hours, materials and machine time the work really takes, ready to reprice for your market.
9cost bases · eight national plus the global CWICR
120,441work items, each broken down into its resources
48markets to reprice a national base into, in local currency
Russia · CWICRGESN / FER / TER
55,719 works
RUBfull resource40+ markets
TurkiyeBirim Fiyat
22,494 works
TRYfull resource
ChinaDinge
10,486 works
CNYfull resource
BrazilSINAPI
9,723 works
BRLfull resource
Spain · AndaluciaBCCA · FIEBDC-3
6,453 works
EURfull resource
Italy · ToscanaPrezzario Regione Toscana
5,836 works
EURfull resource
VietnamDinh Muc
4,299 works
VNDresource norms
IndonesiaAHSP
2,784 works
IDRresource norms
GreeceGGDE
2,647 works
EURfull resource
Worked examples from the bases above
Pick a national base - the same four works, each built from its own resources and article codes.
Every base has its own line items and article codes. Priced bases are shown in euro for a like-for-like comparison; the coefficient bases show resource quantities from the national norm. Every description stays in the language you picked.
03 · how it stacks up
How it compares to what you're using now.
A straight side-by-side. Commercial suites lead on a few long-paid integrations; elsewhere OpenConstructionERP matches or beats them, at zero licence cost.
OpenConstructionERP grows out of a decade of open construction‑tech research.
The cost database, CAD parsers and ML models it depends on were built and
refined inside the same open lab, and ship as part of the same ecosystem.
A note from the team
For the past decade our team has worked on resource management for construction projects. Along the way we got curious about how the industry’s tools came to be - from the first attempts at design automation to today’s ERP platforms - and that turned into a couple of longer pieces (“The Lobbyists’ Wars and the Development of BIM” and “The History of the BIM Map”). It’s hard to see where things are heading without a sense of how we got here.
We’ve written a fair amount on these topics over the years, and some of it found a wide readership. Alongside the writing, we’ve consulted for construction and consulting firms, developers, and software vendors on how they handle project data - treating it as the basis for decisions rather than a byproduct of them. That work let us see the industry from both sides: the people who build the tools, and the people who use them every day. A lot of those observations ended up in the book Data-Driven Construction, now available in 16 languages (datadrivenconstruction.io/books).
Two other problems kept us busy. One was helping non-developers get into proprietary file formats that were never meant to be opened. The other was finding a cleaner way to describe construction work through a resource model. Both produced free tools: the DDC CAD/BIM converters (IFC, DWG, DGN → structured data) on GitHub, and CWICR, a multilingual database of construction works and resources - over 120,000 items in 11 languages, published as OpenConstructionEstimate-DDC-CWICR.
All of it was groundwork for something we’d wanted to build for a long time: an open, modular ERP for construction. The latest generation of tooling finally made it practical to pull the methodology, data models, and earlier implementations together into one platform. It’s now public and open source.
In our experience the best ideas tend to come out of conversation - and out of disagreement. If the questions around construction’s move toward “Uberization,” and toward more transparent cost and time estimation, are interesting to you, we’d be glad to have you in that discussion.
DataDrivenConstruction Team
datadrivenconstruction.io
Development and Contribution Model
A team has built OpenConstructionERP over more than six years, and the code is reviewed, tested and published through one maintainer account, so the GitHub contributor list shows fewer people than actually took part. How we work
Engineers, contractors and consultancies - clients and users of DataDrivenConstruction
ShapemakerScholze-ThostVRAMEAXIA EnergiaAFRYHofschröerTDFRenaissance ConstructionShapemakerScholze-ThostVRAMEAXIA EnergiaAFRYHofschröerTDFRenaissance Construction
Hyundai AutoEverSintagmaTrafikverketTMM GroupDar Al Riyadhpbs IngenieureZPPSCON GmbHHyundai AutoEverSintagmaTrafikverketTMM GroupDar Al Riyadhpbs IngenieureZPPSCON GmbH
Most civil design files are basically data prisons. Loads of useful info, alignments, surfaces, quantities, just sitting there, locked inside formats that were never meant to play nice with anything outside their original software. I’ve wasted way too much time trying to answer simple questions like ‘how many manholes are in this job?’ or ‘what’s the volume by phase?’, only to find out the data’s buried five layers deep in a DWG or DGN. Data Driven Construction fixes that. Their converters crack open these closed formats and give you structured data you can actually use, in Power BI, in Excel, or even in an LLM prompt if you’re doing something fancy. It’s not flashy, but it’s insanely useful. If you’re trying to move beyond screenshots and PDFs and actually use your design data, this is the kind of tool that makes it possible. It’s the difference between guessing and knowing. And honestly, it’s saved me more than a few Saturday mornings.
Chris Andrew
AECOM · Digital Transformation Technical Lead & Associate Director
Be part of the movement with DataDrivenConstruction! Let’s make true freedom in data formats a reality and catalyze a new era of productivity and innovation in construction. The real and necessary journey from closed to “open” formats has not even started: True freedom in data formats, free from proprietary ties and accessible to all, is what we need to unlock innovation and collaboration across the construction industry, particularly benefiting the 99% of construction, i.e. SMEs and unchaining the sector for accelerated growth.
Prof. Dr.-Ing. Michael Bühler
Co-Owner, GemeinWerk Ventures
06 · pricing
Simple,transparentpricing.
Run it yourself for free under AGPL-3.0, choose a commercial plan when you need support or a converter license, or become a partner.
Self-hosted
Free· AGPL-3.0
The full open-source platform. Run it on your infra, no strings attached.
Public workshops shown below. Many major enterprise engagements remain under NDA.
ETH Zürich FOCDrees & SommerLindner GroupOTWBShapeMakerUnder NDADigitales BauenBauindustrie Bayern & TUMBIM Cluster BWBIM DAY GENFHerbert GruppeUnder NDA
Awesome workshop, Artem! Preparations are in full swing! I’m already looking forward to the hackathon in the new year! 💪🏻
Andreas Tomaschewski
Drees & Sommer · Head of Digital Transformation
What happens when you not only organize construction processes, but also analyse them intelligently? This was the topic of our workshop with Artem Boiko on “Data-Driven Construction”. The focus was on the question of how we can make better use of existing data - to make construction projects more efficient, more transparent and less error-prone. Using specific application examples, Artem showed how structured construction data can help to maintain an overview, identify supplements at an early stage and improve communication between planning and execution. Particularly exciting: how digital tools and models can already be used today to automate processes. Data-driven construction is no longer a topic for the future - we are right in the middle of it. The workshop showed how great the potential is if we work together and really make data work for us.
Stefan Traxinger
Lindner Group · Head of Department, BIM Professional
Artem Boiko delivered an outstanding presentation to the entire Shapemaker team, providing deep insights into data migration from engineering software and related topics. His expertise and clear communication made complex concepts easy to grasp, equipping our team with practical knowledge we can apply immediately. Highly recommend his services for anyone seeking clarity and actionable strategies in this space!
Evan Ramenskiy
Shapemaker · CRO & Co-founder
I found the DataDrivenConstruction workshop really interesting. In my opinion, everyone could follow along. You can tell from your slides how much time, perseverance and effort you put into it. The live presentations were great too. The only thing I’d criticise is the number of slides - there were just too many. But that’s complaining at the highest level. Overall, it was the best workshop I’ve ever attended. And on top of that, you’re a really pleasant person.
Kai Schmitt
Dimexcon · Software Engineer for BIM Automation
Original in German
Ich fande DataDrivenConstruction Workshop sehr interessant. Meiner Meinung nach konnten alle folgen. Man merkt auch anhand deiner Folien wieviel Zeit, Ausdauer und Mühe du hineingesteckt hast. Auch die Live Präsentationen waren super. Das einzige was ich bemängeln würde, wäre die Anzahl der Folien, dadurch kamen zu viele slides zustande. Aber das ist meckern auf dem höchsten Niveau. Rundum war es der beste Workshop bei dem ich war. Außerdem bist du auch eine sehr angenehme Person.
I found the DataDrivenConstruction training overall really exciting and very enriching. What I particularly liked: the “historical” background on the various CAD softwares (that was fascinating to hear and felt like investigative journalism); the interesting approach to automation via DataFrames; your own hands-on examples of process automation in construction; and the look at current trends like Claude Code and OpenClaw - you really brought the topic to life. The only downside: it was really a lot of input in just two days. At the same time, you showed us very well how we can continue to orient ourselves - for example by structured recording of our processes on the Miro board. Thanks again for the training and the exchange.
Philip Becker
Herbert Gruppe · Team Lead Prefabrication
Original in German
Die DataDrivenConstruction Schulung fand ich insgesamt wirklich spannend und sehr bereichernd. Besonders gut gefallen haben mir: der „historische“ Hintergrund zu den verschiedenen CAD-Softwares (das war spannend zu hören und hatte etwas von Investigativjournalismus); der interessante Ansatz zur Automatisierung über DataFrames; deine eigenen praxisnahen Beispiele zur Prozessautomatisierung im Bauwesen; und der Einblick in aktuelle Trends wie Claude Code und OpenClaw, du hast das Thema mit Leben gefüllt. Einziger Nachteil: Es war wirklich viel Input in nur zwei Tagen. Gleichzeitig hast du sehr gut aufgezeigt, wie wir uns selbst weiter orientieren können, zum Beispiel über das strukturierte Aufzeichnen unserer Prozesse im Miro-Board. Vielen Dank nochmal für die Schulung und den Austausch.
It was a fantastic workshop with exciting content that we, and I personally, learned a lot from. Thank you for taking so much time for us. We look forward to trying out what we learned as soon as possible and incorporating it into our projects! #bleedingedge
Lukas Fuchs
D&S · BIM Manager
Tell us what you’re after. Every message gets a real reply.
Send a short brief with your budget and timeline, and we’ll get back to you.
Yes. The core is AGPL-3.0 on GitHub.
You can self-host forever, audit every line, fork it, or run it in production.
We also offer a commercial license for enterprises that can’t use AGPL.
What hardware do I need to run it?
The core runs on a 3 GB VPS. One PostgreSQL instance is all you need for a small team.
AI features (takeoff, vector search) are optional. Features degrade gracefully
when AI services aren’t available.
How do I import from my existing system?
Native GAEB XML (X83 / X84 / X89), Excel and CSV import are built in. Other systems connect through the REST API and webhooks, including workflow automation via n8n. Connectors for proprietary systems can be built as modules, and custom migrations are available via Enterprise support.
Do I need AI services to use the product?
No. The BOQ editor, validation pipeline, CAD ingest and cost database all work without AI.
AI takeoff and semantic search are optional enhancements. You can bring your own
model or use the hosted CV/LLM services via Pro.
Who’s behind this?
Built by the DataDrivenConstruction team with help from open-source contributors. The same team is behind CWICR (the 120,000-item cost database shipped here) and cad2data, with 10+ years of construction-tech engineering behind both. We ship our own tools on it.
Can I contribute a module?
Scaffold a module in one command with make module-new, or describe it in the built-in module builder and review every file before you install it. A module is a folder, so you can copy it to another installation and it works there too. Good candidates: regional cost databases, ERP connectors, custom validation rule sets.
Where is my data stored? Does anything leave my server?
On your infrastructure. Projects, drawings and cost data live in your PostgreSQL and your
object storage. Nothing is phoned home, no telemetry by default. If you enable hosted
AI services, only the payload you send is processed; it’s opt-in per workspace and you
can point the client at self-hosted models instead.
What CAD and BIM formats are supported?
DWG, DGN, RVT, IFC, DXF and GLB ingest through the cad2data pipeline into a canonical format,
one schema to query, classify and cost against. PDF drawings go through the takeoff
pipeline (vector extraction + OCR). New formats land as modules, not core rewrites.
How does the commercial license work?
AGPL-3.0 is fine for most internal and service use. If you embed the product in a closed
SaaS, ship it inside a proprietary application, or need an explicit waiver for procurement,
talk to us. Commercial terms cover that, plus priority support and enterprise SLA.
No per-seat metering, no forced cloud.
Can I migrate away later?
Everything you put in comes back out, GAEB XML, Excel, CSV, JSON, Parquet, or a direct PostgreSQL dump. The schema is documented, the source is open; no proprietary file formats, no escrow games, no hostage data.
How often do you ship updates?
Minor releases roughly every 2-3 weeks, patch releases as needed. Changelog lives on
GitHub, every tagged version has a Docker image, and migrations are reversible. You decide
when to upgrade. Self-hosted means nobody forces a deploy window on you.
Which languages and regions are supported?
44 languages ship in the core i18n. Cost database labels, validation rule sets and classification trees are per-region modules, pick the ones you need, add your own. No hard-coded currency, no hard-coded date format.
Stop fighting your tools. Startbuilding.
The free desktop app for Windows, macOS and Linux, or one command on your own server. Open source under AGPL-3.0.
No credit card requiredSelf-host on your infraAGPL-3.0 forever
Practice atlas · the deeper view
Where to look after the homepage.
Four reference pages built on what OpenConstructionERP ships in v18.5.0, checked against the code. Take the assessment to find your starting point, then go deeper into practices, industries and standards.
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Module SDK
Ship a plugin in an afternoon.
Every feature is a module: a folder with a manifest, a lazy-loaded page component
and an entry in the registry. Drop one in, reload, and it shows up in the Modules
page ready to toggle on.
+
more modules
See the module system
04
4:41
How to Install OpenConstructionERP | Windows Setup & First Project
Install on Windows, open the sample project, set language and region, pick modules, invite your team.
12:00
Quantities, BOQ and AI estimating. On your own laptop.
A short walkthrough of the whole pipeline, drawing in, tender out.
4:48
Build a Construction Estimate Step by Step
Builder's Playbook: Getting Started
5:55
Mengen aus PDF und DWG ermitteln
Lernprojekt Landshut
5:34
GAEB-Dateien kontrolliert austauschen
Lernprojekt Landshut
4:23
Tender Work to Subcontractors
Builder's Playbook Canada: Ontario
4:45
Manage Construction Change Orders
Builder's Playbook Canada: Ontario
5:23
Chantier : suivre les heures et le matériel
Builder's Playbook : gestion de chantier
3:44
Réception des travaux et déficiences
Builder's Playbook Québec
OpenConstruction Academy
Full series in English, German and French
All videos on YouTube
PDMS
Brevart
Tekhne
ATMIID
Optimum Technology
Erbud
AtkinsRéalis
Mace Group
Swietelsky
Teichert
Elevait
MAD Engineers
Construccions 360 Plus
LMH
ILO
Niven Builders
DK Construction
Consolis
Colas
Max Bögl
Colas Rail
Unispace
Arkad
Basil Read
C&C Consulting
Tegrity Contractors
PW Pole Barns
Digitarh
Overzicht
CSTB
Midea
Forida
Yutopias
Matrits
Virtuza
Sodexo
Lodha GroupLodha Group
IC İçtaş
L&QL&Q
Rhomberg Sersa Rail Group
The Beck Group
Woolpert
Stecol
Tucrail
Russia · CWICRGESN / FER / TER
TurkiyeBirim Fiyat
ChinaDinge
BrazilSINAPI
Spain · AndaluciaBCCA · FIEBDC-3
Italy · ToscanaPrezzario Regione Toscana
VietnamDinh Muc
IndonesiaAHSP
GreeceGGDE
AECOM
Drees & Sommer
VINCI Energies
Lindner
Artelia
bechtle
Merck
RBS wave
Shapemaker
Scholze-Thost
VRAME
AXIA Energia
AFRY
Hofschröer
TDF
Renaissance Construction
Hyundai AutoEver
Sintagma
Trafikverket
TMM Group
Dar Al Riyadh
pbs Ingenieure
ZPP
SCON GmbH
