diff --git a/scripts/create-sample-projects.js b/scripts/create-sample-projects.js
new file mode 100644
index 0000000..46d3728
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+++ b/scripts/create-sample-projects.js
@@ -0,0 +1,206 @@
+import db from '../src/lib/db.js';
+import initializeDatabase from '../src/lib/init-db.js';
+
+// Initialize the database
+initializeDatabase();
+
+// Sample projects data
+const sampleProjects = [
+  {
+    contract_id: 1,
+    project_name: 'Residential Complex Alpha',
+    address: 'ul. Główna 123',
+    plot: 'Plot 45/6',
+    district: 'Śródmieście',
+    unit: 'Unit A',
+    city: 'Warszawa',
+    investment_number: 'INV-2025-001',
+    finish_date: '2025-06-30',
+    wp: 'WP-001',
+    contact: 'Jan Kowalski, tel. 123-456-789',
+    notes: 'Modern residential building with 50 apartments',
+    coordinates: '52.2297,21.0122',
+    project_type: 'design+construction',
+    project_status: 'registered'
+  },
+  {
+    contract_id: 1,
+    project_name: 'Office Building Beta',
+    address: 'al. Jerozolimskie 50',
+    plot: 'Plot 12/8',
+    district: 'Mokotów',
+    unit: 'Unit B',
+    city: 'Warszawa',
+    investment_number: 'INV-2025-002',
+    finish_date: '2025-09-15',
+    wp: 'WP-002',
+    contact: 'Anna Nowak, tel. 987-654-321',
+    notes: 'Commercial office space, 10 floors',
+    coordinates: '52.2215,21.0071',
+    project_type: 'construction',
+    project_status: 'in_progress_design'
+  },
+  {
+    contract_id: 2,
+    project_name: 'Shopping Mall Gamma',
+    address: 'pl. Centralny 1',
+    plot: 'Plot 78/3',
+    district: 'Centrum',
+    unit: 'Unit C',
+    city: 'Kraków',
+    investment_number: 'INV-2025-003',
+    finish_date: '2025-12-20',
+    wp: 'WP-003',
+    contact: 'Piotr Wiśniewski, tel. 555-123-456',
+    notes: 'Large shopping center with parking',
+    coordinates: '50.0647,19.9450',
+    project_type: 'design+construction',
+    project_status: 'in_progress_construction'
+  },
+  {
+    contract_id: 2,
+    project_name: 'Industrial Warehouse Delta',
+    address: 'ul. Przemysłowa 100',
+    plot: 'Plot 200/15',
+    district: 'Przemysłowa',
+    unit: 'Unit D',
+    city: 'Łódź',
+    investment_number: 'INV-2025-004',
+    finish_date: '2025-08-10',
+    wp: 'WP-004',
+    contact: 'Maria Lewandowska, tel. 444-789-012',
+    notes: 'Logistics warehouse facility',
+    coordinates: '51.7592,19.4600',
+    project_type: 'design',
+    project_status: 'fulfilled'
+  },
+  {
+    contract_id: 1,
+    project_name: 'Hotel Complex Epsilon',
+    address: 'ul. Morska 25',
+    plot: 'Plot 5/2',
+    district: 'Nadmorze',
+    unit: 'Unit E',
+    city: 'Gdańsk',
+    investment_number: 'INV-2025-005',
+    finish_date: '2025-11-05',
+    wp: 'WP-005',
+    contact: 'Tomasz Malinowski, tel. 333-456-789',
+    notes: 'Luxury hotel with conference facilities',
+    coordinates: '54.3520,18.6466',
+    project_type: 'design+construction',
+    project_status: 'registered'
+  },
+  {
+    contract_id: 2,
+    project_name: 'School Complex Zeta',
+    address: 'ul. Edukacyjna 15',
+    plot: 'Plot 30/4',
+    district: 'Edukacyjny',
+    unit: 'Unit F',
+    city: 'Poznań',
+    investment_number: 'INV-2025-006',
+    finish_date: '2025-07-20',
+    wp: 'WP-006',
+    contact: 'Ewa Dombrowska, tel. 222-333-444',
+    notes: 'Modern educational facility with sports complex',
+    coordinates: '52.4064,16.9252',
+    project_type: 'design',
+    project_status: 'in_progress_design'
+  },
+  {
+    contract_id: 1,
+    project_name: 'Medical Center Eta',
+    address: 'al. Zdrowia 8',
+    plot: 'Plot 67/9',
+    district: 'Medyczny',
+    unit: 'Unit G',
+    city: 'Wrocław',
+    investment_number: 'INV-2025-007',
+    finish_date: '2025-10-30',
+    wp: 'WP-007',
+    contact: 'Dr. Marek Szymankowski, tel. 111-222-333',
+    notes: 'Specialized medical center with emergency department',
+    coordinates: '51.1079,17.0385',
+    project_type: 'construction',
+    project_status: 'in_progress_construction'
+  },
+  {
+    contract_id: 2,
+    project_name: 'Sports Stadium Theta',
+    address: 'ul. Sportowa 50',
+    plot: 'Plot 150/20',
+    district: 'Sportowy',
+    unit: 'Unit H',
+    city: 'Szczecin',
+    investment_number: 'INV-2025-008',
+    finish_date: '2025-05-15',
+    wp: 'WP-008',
+    contact: 'Katarzyna Wojcik, tel. 999-888-777',
+    notes: 'Multi-purpose sports stadium with seating for 20,000',
+    coordinates: '53.4289,14.5530',
+    project_type: 'design+construction',
+    project_status: 'fulfilled'
+  },
+  {
+    contract_id: 1,
+    project_name: 'Library Complex Iota',
+    address: 'pl. Wiedzy 3',
+    plot: 'Plot 25/7',
+    district: 'Kulturalny',
+    unit: 'Unit I',
+    city: 'Lublin',
+    investment_number: 'INV-2025-009',
+    finish_date: '2025-08-25',
+    wp: 'WP-009',
+    contact: 'Prof. Andrzej Kowalewski, tel. 777-666-555',
+    notes: 'Modern library with digital archives and community spaces',
+    coordinates: '51.2465,22.5684',
+    project_type: 'design',
+    project_status: 'registered'
+  }
+];
+
+console.log('Creating sample test projects...\n');
+
+sampleProjects.forEach((projectData, index) => {
+  try {
+    // Generate project number based on contract
+    const contractInfo = db.prepare('SELECT contract_number FROM contracts WHERE contract_id = ?').get(projectData.contract_id);
+    const existingProjects = db.prepare('SELECT COUNT(*) as count FROM projects WHERE contract_id = ?').get(projectData.contract_id);
+    const sequentialNumber = existingProjects.count + 1;
+    const projectNumber = `${sequentialNumber}/${contractInfo.contract_number}`;
+
+    const result = db.prepare(`
+      INSERT INTO projects (
+        contract_id, project_name, project_number, address, plot, district, unit, city,
+        investment_number, finish_date, wp, contact, notes, coordinates,
+        project_type, project_status, created_at, updated_at
+      ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+    `).run(
+      projectData.contract_id,
+      projectData.project_name,
+      projectNumber,
+      projectData.address,
+      projectData.plot,
+      projectData.district,
+      projectData.unit,
+      projectData.city,
+      projectData.investment_number,
+      projectData.finish_date,
+      projectData.wp,
+      projectData.contact,
+      projectData.notes,
+      projectData.coordinates,
+      projectData.project_type,
+      projectData.project_status
+    );
+
+    console.log(`✓ Created project: ${projectData.project_name} (ID: ${result.lastInsertRowid}, Number: ${projectNumber})`);
+
+  } catch (error) {
+    console.error(`✗ Error creating project ${projectData.project_name}:`, error.message);
+  }
+});
+
+console.log('\nSample test projects created successfully!');