diff --git a/backend/src/routes/cockpit.ts b/backend/src/routes/cockpit.ts
index fc6cedb..e58b0bc 100644
--- a/backend/src/routes/cockpit.ts
+++ b/backend/src/routes/cockpit.ts
@@ -18,6 +18,7 @@ const TICKET_SELECT = {
   createdAt: true,
   room: { select: { roomNumber: true } },
   creator: { select: { id: true, fullName: true } },
+  craftsman: { select: { id: true, name: true, trade: true, phone: true } },
 } as const;
 
 // Erfordert Login: sensible Miet- und Kontaktdaten dürfen nicht öffentlich sein.
diff --git a/backend/src/routes/contracts.ts b/backend/src/routes/contracts.ts
new file mode 100644
index 0000000..ddb1f68
--- /dev/null
+++ b/backend/src/routes/contracts.ts
@@ -0,0 +1,77 @@
+import { Router, Response } from 'express';
+import { PrismaClient } from '@prisma/client';
+import { AuthedRequest, requireAuth } from '../middleware/auth';
+
+const prisma = new PrismaClient();
+
+/**
+ * Router für Kündigungsfristen-Erinnerungen.
+ *
+ * Nutzt die bereits vorhandenen Vertragsfelder (endDate, noticePeriodMonths)
+ * — kein Extra-Datenmodell nötig. Ein Mieter sieht ausschließlich seinen
+ * eigenen Vertrag; Vermieter/Admin sehen alle aktiven Verträge.
+ */
+export const contractsRouter = Router();
+
+const CONTRACT_SELECT = {
+  id: true,
+  startDate: true,
+  endDate: true,
+  noticePeriodMonths: true,
+  isActive: true,
+  user: { select: { id: true, fullName: true } },
+  room: { select: { id: true, roomNumber: true } },
+};
+
+function addMonths(date: Date, months: number): Date {
+  const d = new Date(date);
+  d.setMonth(d.getMonth() - months);
+  return d;
+}
+
+// GET /contracts/notice-deadlines — für befristete Verträge (endDate gesetzt)
+// wird die späteste Kündigungsfrist (endDate - noticePeriodMonths) berechnet.
+// Unbefristete Verträge (endDate = NULL) zeigen nur die geltende Kündigungs-
+// frist an, ohne konkretes Datum. Rückgabe ist nach Dringlichkeit sortiert.
+contractsRouter.get('/contracts/notice-deadlines', requireAuth, async (req: AuthedRequest, res: Response) => {
+  const isLandlord = req.user!.role === 'LANDLORD' || req.user!.role === 'ADMIN';
+
+  const where: Record<string, unknown> = { isActive: true };
+  if (!isLandlord) {
+    where.userId = req.user!.id;
+  }
+
+  const contracts = await prisma.contract.findMany({
+    where,
+    select: CONTRACT_SELECT,
+    orderBy: { endDate: 'asc' },
+  });
+
+  const now = new Date();
+  const items = contracts.map((c) => {
+    const noticeDeadline = c.endDate ? addMonths(c.endDate, c.noticePeriodMonths) : null;
+    const daysUntilDeadline = noticeDeadline
+      ? Math.ceil((noticeDeadline.getTime() - now.getTime()) / (1000 * 60 * 60 * 24))
+      : null;
+    return {
+      contractId: c.id,
+      user: c.user,
+      room: c.room,
+      startDate: c.startDate,
+      endDate: c.endDate,
+      noticePeriodMonths: c.noticePeriodMonths,
+      noticeDeadline,
+      daysUntilDeadline,
+      isUrgent: daysUntilDeadline !== null && daysUntilDeadline <= 30 && daysUntilDeadline >= 0,
+      isOverdue: daysUntilDeadline !== null && daysUntilDeadline < 0,
+    };
+  });
+
+  items.sort((a, b) => {
+    if (a.daysUntilDeadline === null) return 1;
+    if (b.daysUntilDeadline === null) return -1;
+    return a.daysUntilDeadline - b.daysUntilDeadline;
+  });
+
+  res.status(200).json({ deadlines: items });
+});
diff --git a/backend/src/routes/craftsmen.ts b/backend/src/routes/craftsmen.ts
new file mode 100644
index 0000000..5d0809f
--- /dev/null
+++ b/backend/src/routes/craftsmen.ts
@@ -0,0 +1,78 @@
+import { Router, Response } from 'express';
+import { PrismaClient, CraftsmanTrade } from '@prisma/client';
+import { AuthedRequest, requireAuth, requireRole } from '../middleware/auth';
+
+const prisma = new PrismaClient();
+
+/**
+ * Router für Handwerker-Kontakte (Anbindung an Schadensmeldungen).
+ *
+ * Handwerker sind reine Kontaktkarten ohne eigenen Login. Anlegen/Bearbeiten/
+ * Löschen ist Vermieter/Admin vorbehalten; die Liste (zum Zuweisen an ein
+ * Ticket) dürfen auch Mieter lesen, da sie ohnehin auf zugewiesenen Tickets
+ * sichtbar ist (kein privates Datum).
+ */
+export const craftsmenRouter = Router();
+
+const TRADES = Object.values(CraftsmanTrade);
+
+const CRAFTSMAN_SELECT = {
+  id: true,
+  name: true,
+  trade: true,
+  phone: true,
+  email: true,
+  notes: true,
+  createdAt: true,
+};
+
+craftsmenRouter.get('/craftsmen', requireAuth, async (_req: AuthedRequest, res: Response) => {
+  const craftsmen = await prisma.craftsman.findMany({
+    orderBy: { name: 'asc' },
+    select: CRAFTSMAN_SELECT,
+  });
+  res.status(200).json({ craftsmen });
+});
+
+craftsmenRouter.post(
+  '/craftsmen',
+  requireAuth,
+  requireRole('LANDLORD', 'ADMIN'),
+  async (req: AuthedRequest, res: Response) => {
+    const { name, trade, phone, email, notes } = req.body || {};
+    if (!name || typeof name !== 'string' || !name.trim()) {
+      return res.status(400).json({ error: 'name ist erforderlich' });
+    }
+    if (trade && !TRADES.includes(trade)) {
+      return res.status(400).json({ error: `Ungültiges Gewerk. Erlaubt: ${TRADES.join(', ')}` });
+    }
+
+    const craftsman = await prisma.craftsman.create({
+      data: {
+        name: name.trim().slice(0, 120),
+        trade: trade || CraftsmanTrade.SONSTIGES,
+        phone: typeof phone === 'string' && phone.trim() ? phone.trim().slice(0, 40) : null,
+        email: typeof email === 'string' && email.trim() ? email.trim().slice(0, 120) : null,
+        notes: typeof notes === 'string' && notes.trim() ? notes.trim().slice(0, 300) : null,
+      },
+      select: CRAFTSMAN_SELECT,
+    });
+
+    res.status(201).json({ craftsman });
+  },
+);
+
+craftsmenRouter.delete(
+  '/craftsmen/:id',
+  requireAuth,
+  requireRole('LANDLORD', 'ADMIN'),
+  async (req: AuthedRequest, res: Response) => {
+    try {
+      await prisma.ticket.updateMany({ where: { craftsmanId: req.params.id }, data: { craftsmanId: null } });
+      await prisma.craftsman.delete({ where: { id: req.params.id } });
+      res.status(204).send();
+    } catch {
+      res.status(404).json({ error: 'Handwerker nicht gefunden' });
+    }
+  },
+);
diff --git a/backend/src/routes/tickets.ts b/backend/src/routes/tickets.ts
index 488bfbf..f7fe49f 100644
--- a/backend/src/routes/tickets.ts
+++ b/backend/src/routes/tickets.ts
@@ -36,6 +36,7 @@ const TICKET_SELECT = {
   room: { select: { id: true, roomNumber: true } },
   creator: { select: { id: true, fullName: true } },
   assignee: { select: { id: true, fullName: true } },
+  craftsman: { select: { id: true, name: true, trade: true, phone: true, email: true } },
 };
 
 ticketsRouter.post('/tickets', requireAuth, async (req: AuthedRequest, res: Response) => {
@@ -116,7 +117,7 @@ ticketsRouter.patch(
   requireAuth,
   requireRole('LANDLORD', 'ADMIN'),
   async (req: AuthedRequest, res: Response) => {
-    const { status, priority, assigneeId } = req.body || {};
+    const { status, priority, assigneeId, craftsmanId } = req.body || {};
     const data: Record<string, unknown> = {};
 
     if (status !== undefined) {
@@ -135,6 +136,9 @@ ticketsRouter.patch(
     if (assigneeId !== undefined) {
       data.assigneeId = assigneeId || null;
     }
+    if (craftsmanId !== undefined) {
+      data.craftsmanId = craftsmanId || null;
+    }
 
     if (Object.keys(data).length === 0) {
       return res.status(400).json({ error: 'Keine Änderungen übergeben' });
diff --git a/backend/src/routes/utilityStatements.ts b/backend/src/routes/utilityStatements.ts
new file mode 100644
index 0000000..86c6dd1
--- /dev/null
+++ b/backend/src/routes/utilityStatements.ts
@@ -0,0 +1,169 @@
+import { Router, Response } from 'express';
+import { PrismaClient, SettlementStatus } from '@prisma/client';
+import { AuthedRequest, requireAuth, requireRole } from '../middleware/auth';
+
+const prisma = new PrismaClient();
+
+/**
+ * Router für die Nebenkostenabrechnung.
+ *
+ * Der Vermieter trägt eine Abrechnung (Zeitraum + Gesamtbetrag) ein; die App
+ * verteilt den Betrag automatisch proportional zur Zimmergröße (sizeSqm) auf
+ * alle aktuell aktiven Mieter — dieselbe faire Grundlage wie bei der
+ * Nettokaltmiete. Zugriffsregel: ein Mieter sieht nur seinen EIGENEN Anteil,
+ * niemals die Anteile anderer Mieter (private Abrechnungsdaten). Vermieter/
+ * Admin sehen die komplette Abrechnung inkl. aller Anteile.
+ */
+export const utilityStatementsRouter = Router();
+
+const SHARE_SELECT = {
+  id: true,
+  shareAmount: true,
+  settlementStatus: true,
+  settledAt: true,
+  user: { select: { id: true, fullName: true } },
+  room: { select: { id: true, roomNumber: true } },
+};
+
+const STATEMENT_SELECT_LANDLORD = {
+  id: true,
+  periodStart: true,
+  periodEnd: true,
+  totalAmount: true,
+  description: true,
+  createdAt: true,
+  createdBy: { select: { id: true, fullName: true } },
+  shares: { select: SHARE_SELECT },
+};
+
+// POST /utility-statements — Abrechnung anlegen, automatischer Split nach
+// Zimmergröße unter allen aktuell aktiven Mietern (Vermieter/Admin only).
+utilityStatementsRouter.post(
+  '/utility-statements',
+  requireAuth,
+  requireRole('LANDLORD', 'ADMIN'),
+  async (req: AuthedRequest, res: Response) => {
+    const { periodStart, periodEnd, totalAmount, description } = req.body || {};
+
+    const parsedAmount = Number(totalAmount);
+    if (!Number.isFinite(parsedAmount) || parsedAmount <= 0) {
+      return res.status(400).json({ error: 'totalAmount muss eine positive Zahl sein' });
+    }
+    const start = new Date(periodStart);
+    const end = new Date(periodEnd);
+    if (isNaN(start.getTime()) || isNaN(end.getTime()) || start >= end) {
+      return res.status(400).json({ error: 'periodStart/periodEnd sind ungültig' });
+    }
+
+    // Aktive Verträge mit Zimmer laden, um proportional nach sizeSqm zu splitten.
+    const activeContracts = await prisma.contract.findMany({
+      where: { isActive: true },
+      select: { userId: true, roomId: true, room: { select: { sizeSqm: true } } },
+    });
+
+    if (activeContracts.length === 0) {
+      return res.status(409).json({ error: 'Keine aktiven Mietverträge vorhanden, Split nicht möglich' });
+    }
+
+    const totalSqm = activeContracts.reduce((sum, c) => sum + Number(c.room.sizeSqm), 0);
+
+    let allocated = 0;
+    const shares = activeContracts.map((c, idx) => {
+      const isLast = idx === activeContracts.length - 1;
+      let shareAmount: number;
+      if (isLast) {
+        // letzter Anteil bekommt den Rest, um Rundungsdifferenzen zu vermeiden
+        shareAmount = Math.round((parsedAmount - allocated) * 100) / 100;
+      } else {
+        shareAmount = Math.round(((parsedAmount * Number(c.room.sizeSqm)) / totalSqm) * 100) / 100;
+        allocated += shareAmount;
+      }
+      return {
+        userId: c.userId,
+        roomId: c.roomId,
+        shareAmount,
+        settlementStatus: SettlementStatus.OPEN,
+      };
+    });
+
+    const statement = await prisma.utilityStatement.create({
+      data: {
+        periodStart: start,
+        periodEnd: end,
+        totalAmount: parsedAmount,
+        description: typeof description === 'string' ? description.trim().slice(0, 300) : null,
+        createdById: req.user!.id,
+        shares: { create: shares },
+      },
+      select: STATEMENT_SELECT_LANDLORD,
+    });
+
+    res.status(201).json({ statement });
+  },
+);
+
+// GET /utility-statements — Vermieter/Admin sehen alle Abrechnungen mit allen
+// Anteilen; Mieter sehen alle Abrechnungen, aber NUR ihren eigenen Anteil
+// (kein Einblick in die Anteile anderer Mieter).
+utilityStatementsRouter.get('/utility-statements', requireAuth, async (req: AuthedRequest, res: Response) => {
+  const isLandlord = req.user!.role === 'LANDLORD' || req.user!.role === 'ADMIN';
+
+  const statements = await prisma.utilityStatement.findMany({
+    orderBy: { periodStart: 'desc' },
+    select: {
+      id: true,
+      periodStart: true,
+      periodEnd: true,
+      totalAmount: true,
+      description: true,
+      createdAt: true,
+      createdBy: { select: { id: true, fullName: true } },
+      shares: {
+        select: SHARE_SELECT,
+        where: isLandlord ? undefined : { userId: req.user!.id },
+      },
+    },
+  });
+
+  res.status(200).json({ statements });
+});
+
+// PATCH /utility-statement-shares/:id — eigenen Anteil als beglichen markieren
+// (Mieter selbst) oder durch Vermieter/Admin.
+utilityStatementsRouter.patch(
+  '/utility-statement-shares/:id',
+  requireAuth,
+  async (req: AuthedRequest, res: Response) => {
+    const share = await prisma.utilityStatementShare.findUnique({ where: { id: req.params.id } });
+    if (!share) return res.status(404).json({ error: 'Anteil nicht gefunden' });
+
+    const isLandlord = req.user!.role === 'LANDLORD' || req.user!.role === 'ADMIN';
+    if (!isLandlord && share.userId !== req.user!.id) {
+      return res.status(403).json({ error: 'Keine Berechtigung, diesen Anteil zu ändern' });
+    }
+
+    const updated = await prisma.utilityStatementShare.update({
+      where: { id: req.params.id },
+      data: { settlementStatus: SettlementStatus.SETTLED, settledAt: new Date() },
+      select: SHARE_SELECT,
+    });
+
+    res.status(200).json({ share: updated });
+  },
+);
+
+// DELETE /utility-statements/:id — nur Vermieter/Admin.
+utilityStatementsRouter.delete(
+  '/utility-statements/:id',
+  requireAuth,
+  requireRole('LANDLORD', 'ADMIN'),
+  async (req: AuthedRequest, res: Response) => {
+    try {
+      await prisma.utilityStatementShare.deleteMany({ where: { statementId: req.params.id } });
+      await prisma.utilityStatement.delete({ where: { id: req.params.id } });
+      res.status(204).send();
+    } catch {
+      res.status(404).json({ error: 'Abrechnung nicht gefunden' });
+    }
+  },
+);