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https://github.com/datadrivenconstruction/openconstructionerp

Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching. 42 regional catalogues, 21 languages, 71 modules. AGPL-3.0. v3.0 - pip install openconstructionerp
https://github.com/datadrivenconstruction/openconstructionerp

4d 5d ai autocad bill-of-quantities bim boq cad calculation construction cost-estimation erp fastapi ifc masterformat open-source pdf qto revit takeoff

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Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching. 42 regional catalogues, 21 languages, 71 modules. AGPL-3.0. v3.0 - pip install openconstructionerp

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README 

          



# OpenConstructionERP



**The #1 Open-Source Construction Estimation & Project Management Software**



Professional BOQ, 4D/5D planning, AI-powered estimation, CAD/BIM takeoff — all in one platform.



[Demo](https://openconstructionerp.com) · [Documentation](https://openconstructionerp.com/docs) · [Discussions](https://t.me/datadrivenconstruction) · [Report Bug](https://github.com/datadrivenconstruction/OpenConstructionERP/issues)



![License](https://img.shields.io/badge/license-AGPL--3.0-blue)

![Version](https://img.shields.io/badge/version-0.2.0-green)

![Languages](https://img.shields.io/badge/languages-21-orange)

![Cost Items](https://img.shields.io/badge/cost_items-55%2C000%2B-red)

![Standards](https://img.shields.io/badge/standards-20-blueviolet)



OpenConstructionERP — Dashboard Overview



*100% open source · 55,000+ cost items · AI estimation · 21 languages · Self-hosted*






---



## Why OpenConstructionERP?



Construction cost estimation software is expensive, closed-source, and locked to specific regions. OpenConstructionERP changes that.



| What you get | How it works |

|-------------|-------------|

| **Free forever** | AGPL-3.0 license. No subscriptions, no per-seat fees, no vendor lock-in. |

| **Your data, your server** | Self-hosted. Everything runs on your machine — nothing leaves your network. |

| **21 languages** | Full UI translation: English, German, French, Spanish, Portuguese, Russian, Chinese, Arabic, Hindi, Japanese, Korean, and 10 more. |

| **20 regional standards** | DIN 276, NRM 1/2, CSI MasterFormat, GAEB, ГЭСН, DPGF, GB/T 50500, CPWD, and more. |

| **AI-powered** | Connect any LLM provider (Anthropic, OpenAI, Gemini, Mistral, Groq, DeepSeek) for smart estimation. |

| **55,000+ cost items** | CWICR database with 11 regional pricing databases (DACH, UK, US, France, Spain, Brazil, Russia, UAE, China, India, Canada). |



### How It Compares



Capability

OpenConstructionERP

RIB iTWO

Exactal CostX

Sage Estimating

Bluebeam



LicenseAGPL-3.0 (free)ProprietaryProprietaryProprietaryProprietary

Self-hosted / offline✔✖✖⚠ partial✖

PriceFree forever~€500/mo~€300/mo~€200/mo~€30/mo

AI estimation✔ 7 LLM providers✖✖✖✖

UI languages215328

Regional standards20432—

BOQ editor✔✔✔✔✖

CAD/BIM takeoff✔ RVT IFC DWG DGN✔✔✖✔ PDF only

4D/5D planning✔✔✖✖✖

Cost database included✔ 55K+ items with rates✖ extra cost✖ extra cost✖ extra cost✖

Resource catalog✔ 7K+ with prices✖ extra cost✖✖✖

Validation engine✔ 42 rules⚠ limited✖✖✖

REST API✔ full access⚠ limited✖✖✖



Product names are trademarks of their respective owners. This comparison is based on publicly available information as of Q1 2026. Pricing is approximate (per-seat, list price) and may vary by region. OpenConstructionERP is not affiliated with any of the listed vendors.



---



### Complete Estimation Workflow



OpenConstructionERP covers the full lifecycle — from first sketch to final tender submission:



```

  Upload              Convert            Validate           Estimate           Tender

 ┌────────┐        ┌──────────┐       ┌───────────┐      ┌──────────┐      ┌──────────┐

 │PDF/CAD │───────▶│ Extract  │──────▶│ 42 rules  │─────▶│BOQ Editor│─────▶│ Bid Pkgs │

 │Photo   │        │quantities│       │ DIN/NRM/  │      │ + AI     │      │ Compare  │

 │Text    │        │ + AI     │       │ MasterFmt │      │ + Costs  │      │ Award    │

 └────────┘        └──────────┘       └───────────┘      └──────────┘      └──────────┘

                                                               │

                                                         ┌─────┴──────┐

                                                         │ 4D Schedule│

                                                         │ 5D Costs   │

                                                         │ Risk Reg.  │

                                                         │ Reports    │

                                                         └────────────┘

```



---



⭐ If you want to see new updates and database versions and if you find our tools useful please give our repositories a star to see more similar applications for the construction industry.

Star OpenConstructionERP on GitHub and be instantly notified of new releases.



  


  

  





---



## Key Features



### 📊 Bill of Quantities (BOQ) Management



BOQ Editor — Create, manage and analyze Bills of Quantities



Build professional cost estimates with a powerful BOQ editor:



- **Hierarchical BOQ structure** — Sections, positions, sub-positions with drag-and-drop reordering

- **Inline editing** — Click any cell to edit. Tab between fields. Undo/redo with Ctrl+Z

- **Resources & assemblies** — Link labor, materials, equipment to each position. Build reusable cost recipes

- **Markups** — Overhead, profit, VAT, contingency — configure per project or use regional defaults

- **Automatic calculations** — Quantity × unit rate = total. Section subtotals. Grand total with markups

- **Validation** — 42 built-in rules check for missing quantities, zero prices, duplicate items, and compliance with DIN 276, NRM, MasterFormat

- **Export** — Download as Excel, CSV, PDF report, or GAEB XML (X83)



### 🗄️ Cost Databases & Resource Catalog



Cost Database — 55,000+ items across 11 regions



Access the world's construction pricing data:



- **CWICR database** — 55,000+ cost items covering all major construction trades. Available in 9 languages with 11 regional price sets

- **Smart search** — Find items by description, code, or classification. AI-powered semantic search matches meaning, not just keywords ("concrete wall" finds "reinforced partition C30/37")

- **Resource catalog** — 7,000+ materials, equipment, labor rates, and operators. Build custom assemblies from catalog items

- **Regional pricing** — Automatic price adjustment based on project location. Compare rates across regions

- **Import your data** — Upload your own cost database from Excel, CSV, or connect via API



### 🏗️ CAD/BIM Takeoff & AI Estimation



CAD/BIM Takeoff and AI-powered estimation



Extract quantities from any source — drawings, models, text, or photos:



- **CAD/BIM takeoff** — Upload Revit (.rvt), IFC, AutoCAD (.dwg), or MicroStation (.dgn) files. DDC converters extract elements with volumes, areas, and lengths automatically

- **Interactive QTO** — Choose how to group extracted data: by Category, Type, Level, Family. Format-specific presets for Revit and IFC

- **PDF measurement** — Open construction drawings directly in the browser. Measure distances, areas, and count elements with calibrated scale

- **AI estimation** — Describe your project in plain text, upload a building photo, or paste a PDF — AI generates a complete BOQ with quantities and market rates

- **AI Cost Advisor** — Ask questions about pricing, materials, or estimation methodology. AI answers using your cost database as context

- **Cost matching** — After AI generates an estimate, match each item against your CWICR database to replace AI-guessed rates with real market prices



### 📅 4D Scheduling & 5D Cost Model



Plan your project timeline and track costs over time:



- **Gantt chart** — Visual project schedule with drag-and-drop activities, dependencies (FS/FF/SS/SF), and critical path highlighting

- **Auto-generate from BOQ** — Create schedule activities directly from your BOQ sections with cost-proportional durations

- **Earned Value Management** — Track SPI, CPI, EAC, and variance. S-curve visualization shows planned vs actual progress

- **Budget tracking** — Set baselines, compare snapshots, run what-if scenarios

- **Monte Carlo simulation** — Risk-adjusted schedule analysis with probability distributions



### 📋 Tendering, Risk & Reporting



Complete your estimation workflow:



- **Tendering** — Create bid packages, distribute to subcontractors, collect and compare bids with side-by-side price mirror

- **Change orders** — Track scope changes with cost and schedule impact analysis

- **Risk register** — Probability × impact matrix, mitigation strategies, risk-adjusted contingency

- **Reports** — Generate professional PDF reports, Excel exports, GAEB XML. 12 built-in templates

- **Documents** — Centralized file management with version tracking and drag-and-drop upload



### 📝 Requirements & Quality Gates



Track and validate construction requirements with the EAC (Entity-Attribute-Constraint) system:



- **EAC Triplets** — Capture requirements as structured data: Entity (wall), Attribute (fire_rating), Constraint (≥ F90)

- **4 Quality Gates** — Completeness → Consistency → Coverage → Compliance. Run sequentially to validate requirements

- **BOQ Traceability** — Link each requirement to BOQ positions for full traceability from spec to estimate

- **Bulk Import** — Import requirements from structured text (pipe-delimited format)

- **Categories** — Structural, fire safety, thermal, acoustic, waterproofing, electrical, mechanical, architectural



### ✏️ PDF Markups & Annotations



Annotate construction drawings and documents directly in the browser:



- **10 markup types** — Cloud, arrow, text, rectangle, highlight, polygon, distance, area, count, stamp

- **Custom stamps** — Approved, Rejected, For Review, Revised, Final + create your own with logo and date

- **Scale calibration** — Set real-world scale per page for accurate measurements

- **Markups List** — Table view of all annotations with filters, search, and CSV export

- **BOQ Integration** — Link measurements directly to BOQ positions (quantity = measured value)



### ✅ Punch List



Track construction deficiencies from discovery to resolution:



- **5-stage workflow** — Open → In Progress → Resolved → Verified → Closed

- **Location pins** — Mark exact position on PDF drawings (x/y coordinates)

- **Priority levels** — Low, Medium, High, Critical with color coding

- **Photo attachments** — Upload photos of deficiencies from the field

- **Categories** — Structural, mechanical, electrical, architectural, fire safety, plumbing, finishing

- **PDF Export** — Generate punch list reports for stakeholder review

- **Verification control** — Different user must verify (not the resolver)



### 🌍 20 Regional Standards



| Standard | Region | Format |

|----------|--------|--------|

| DIN 276 / ÖNORM / SIA | Germany / Austria / Switzerland | Excel, CSV |

| NRM 1/2 (RICS) | United Kingdom | Excel, CSV |

| CSI MasterFormat | United States / Canada | Excel, CSV |

| GAEB DA XML 3.3 | DACH region | XML |

| DPGF / DQE | France | Excel, CSV |

| ГЭСН / ФЕР | Russia / CIS | Excel, CSV |

| GB/T 50500 | China | Excel, CSV |

| CPWD / IS 1200 | India | Excel, CSV |

| Bayındırlık Birim Fiyat | Turkey | Excel, CSV |

| 積算基準 (Sekisan) | Japan | Excel, CSV |

| Computo Metrico / DEI | Italy | Excel, CSV |

| STABU / RAW | Netherlands | Excel, CSV |

| KNR / KNNR | Poland | Excel, CSV |

| 표준품셈 | South Korea | Excel, CSV |

| NS 3420 / AMA | Nordic countries | Excel, CSV |

| ÚRS / TSKP | Czech Republic / Slovakia | Excel, CSV |

| ACMM / ANZSMM | Australia / New Zealand | Excel, CSV |

| CSI / CIQS | Canada | Excel, CSV |

| FIDIC | UAE / GCC | Excel, CSV |

| PBC / Base de Precios | Spain | Excel, CSV |



### 🛡️ Validation & Compliance Engine



Ensure your estimates meet regulatory standards before submission:



- **42 built-in rules** across 13 rule sets — DIN 276, NRM, MasterFormat, GAEB, and universal BOQ quality checks

- **Real-time validation** — Run checks with Ctrl+Shift+V. Each position gets a pass/warning/error indicator

- **Quality score** — Overall BOQ quality percentage (0–100%) visible in the toolbar

- **Drill-down** — Click any finding to jump directly to the affected BOQ position and fix it

- **Custom rules** — Define project-specific validation rules via the rule builder or Python scripting



### 🚀 Guided Onboarding



Get productive in under 10 minutes:



1. **Choose language** — Select from 21 languages. The entire UI switches instantly

2. **Select region** — Determines default cost database, currency, and classification standard

3. **Load cost database** — One-click import of CWICR pricing data for your region (55,000+ items)

4. **Import resource catalog** — Materials, labor, equipment, and pre-built assemblies

5. **Configure AI** *(optional)* — Enter an API key from any supported LLM provider

6. **Create your first project** — Set name, region, standard, and start estimating



---



## Quick Start



### Fastest: One-Line Install



```bash

# Linux / macOS

curl -sSL https://raw.githubusercontent.com/datadrivenconstruction/OpenConstructionERP/main/scripts/install.sh | bash



# Windows (PowerShell)

irm https://raw.githubusercontent.com/datadrivenconstruction/OpenConstructionERP/main/scripts/install.ps1 | iex

```



Auto-detects Docker / Python / uv → installs and runs at **http://localhost:8080**



### Option 1: Docker (recommended)



```bash

git clone https://github.com/datadrivenconstruction/OpenConstructionERP.git

cd OpenConstructionERP

make quickstart

```



Open **http://localhost:8080** — builds everything in ~2 minutes.



### Option 2: Local Development (no Docker)



```bash

git clone https://github.com/datadrivenconstruction/OpenConstructionERP.git

cd OpenConstructionERP



# Install dependencies

cd backend && pip install -r requirements.txt && cd ..

cd frontend && npm install && cd ..



# Start (Linux/macOS)

make dev



# Start (Windows — two terminals)

# Terminal 1: cd backend && uvicorn app.main:create_app --factory --reload --port 8000

# Terminal 2: cd frontend && npm run dev

```



Open **http://localhost:5173** — requires Python 3.12+ and Node.js 20+. Uses SQLite by default — zero configuration needed.



### Option 3: pip install (full app — backend + frontend)



```bash

pip install openconstructionerp

openconstructionerp serve --open

```



One command installs everything. Opens browser at **http://localhost:8080** with full UI. Uses SQLite — zero config. [PyPI package](https://pypi.org/project/openconstructionerp/) (2.6 MB, includes pre-built frontend).



### Demo Accounts



Three demo accounts are created automatically on first start:



| Account | Email | Password | Role |

|---------|-------|----------|------|

| Admin | `demo@openestimator.io` | `DemoPass1234!` | Full access |

| Estimator | `estimator@openestimator.io` | `DemoPass1234!` | Estimator |

| Manager | `manager@openestimator.io` | `DemoPass1234!` | Manager |



> Demo accounts include 5 pre-loaded projects from Berlin, London, New York, Paris, and Dubai with complete BOQs, schedules, and cost models.



---



## Tech Stack



| Layer | Technology | Purpose |

|-------|-----------|---------|

| Backend | Python 3.12+ / FastAPI | Async API, Pydantic v2 validation, modular architecture |

| Frontend | React 18 / TypeScript / Vite | SPA with code splitting, 21 language bundles |

| Database | PostgreSQL 16+ / SQLite (dev) | OLTP with JSON columns, zero-config SQLite for development |

| UI | Tailwind CSS / AG Grid | Professional data grid, responsive design, dark mode |

| AI | Any LLM via REST API | Anthropic, OpenAI, Gemini, Mistral, Groq, DeepSeek |

| Vector Search | LanceDB (embedded) / Qdrant | Semantic cost item search, 384d or 3072d embeddings |

| CAD/BIM | [DDC cad2data](https://github.com/datadrivenconstruction) | RVT, IFC, DWG, DGN → structured quantities |

| i18n | i18next + 21 language packs | Full RTL support (Arabic), locale-aware formatting |



## Architecture



```

┌──────────────────────────────────────────────────┐

│  Frontend (React SPA)                            │

│  TypeScript · Tailwind · AG Grid · PDF.js        │

└──────────────────┬───────────────────────────────┘

                   │ REST API

┌──────────────────┴───────────────────────────────┐

│  Backend (FastAPI)                               │

│  20 auto-discovered modules · Plugin system      │

├──────────────────────────────────────────────────┤

│  BOQ · Costs · Schedule · 5D · Validation · AI  │

│  Takeoff · Tendering · Risk · Reports · Catalog  │

│  Requirements · Markups · Punch List             │

├──────────────────────────────────────────────────┤

│  Database (PostgreSQL / SQLite)                  │

│  Vector DB (LanceDB / Qdrant)                    │

│  CAD Converters (DDC cad2data)                   │

└──────────────────────────────────────────────────┘

```



---



## Support the Project



OpenConstructionERP is built and maintained by the community. If you find it useful:



- ⭐ **[Star this repo](https://github.com/datadrivenconstruction/OpenConstructionERP)** — helps others discover the project

- 💬 **[Join Discussions](https://t.me/datadrivenconstruction)** — ask questions, share ideas, help others

- 🐛 **[Report issues](https://github.com/datadrivenconstruction/OpenConstructionERP/issues)** — help us improve

- 💼 **[Professional consulting](https://datadrivenconstruction.io/contact-support/)** — custom deployment, training, enterprise support



## Security



OpenConstructionERP includes security hardening for production deployments:

- Path traversal protection on all file download endpoints

- CORS wildcard blocking in production mode

- Bounded input validation on bulk price operations

- Generic error responses to prevent account enumeration

- Production startup checks for secrets, credentials, and database configuration



Report vulnerabilities via [GitHub Issues](https://github.com/datadrivenconstruction/OpenConstructionERP/issues) (private reports supported).



## Contributing



We welcome contributions! See [CONTRIBUTING.md](CONTRIBUTING.md) for development guidelines, code style, and PR process.



## License



**AGPL-3.0** — see [LICENSE](LICENSE).



You can freely use, modify, and distribute this software. If you modify and deploy it as a service, you must make your source code available under the same license.



For commercial licensing without AGPL obligations, contact [info@datadrivenconstruction.io](mailto:info@datadrivenconstruction.io).



---






**Created by [Artem Boiko](https://www.linkedin.com/in/boikoartem/)** · [Data Driven Construction](https://datadrivenconstruction.io)



Building open-source tools for the global construction industry.



[Website](https://datadrivenconstruction.io) · [LinkedIn](https://www.linkedin.com/in/boikoartem/) · [YouTube](https://www.youtube.com/@datadrivenconstruction) · [GitHub](https://github.com/datadrivenconstruction)