diff --git a/services/leaseService.ts b/services/leaseService.ts
index 88b7387..3e93174 100644
--- a/services/leaseService.ts
+++ b/services/leaseService.ts
@@ -3,7 +3,7 @@
 
 import { and, eq } from "drizzle-orm";
 import { db } from "../db/db.ts";
-import { leases } from "../db/schema.ts";
+import { leases, tenant_invites } from "../db/schema.ts";
 import { Lease } from "../db/interfaces.ts";
 import {
   getE2ELeaseById,
@@ -259,3 +259,52 @@ export async function getLeaseStatsByOwner(owner_id: string) {
 
 
 
+
+
+/**
+ * Link a lease to a tenant invite. If an inviteId is provided, update that
+ * tenant_invites row to reference this lease. Otherwise attempt to find an
+ * existing invite by the lease's property and owner and attach the lease_id
+ * there; if none exists, create a new tenant_invites row linking to the lease.
+ */
+export async function inviteLease(lease_id: string, inviteId?: string) {
+  // If an explicit inviteId was provided, update that invite record
+  if (inviteId) {
+    const now = Date.now();
+    return await db.update(tenant_invites)
+      .set({ lease_id, updated_on: now })
+      .where(eq(tenant_invites.id, inviteId))
+      .returning();
+  }
+
+  // Otherwise derive the property and landlord from the lease
+  const lease = await getLeaseById(lease_id);
+  if (!lease) return null;
+
+  const existing = await db.select().from(tenant_invites).where(
+    and(
+      eq(tenant_invites.property_id, lease.property_id),
+      eq(tenant_invites.landlord_id, lease.owner_id),
+    ),
+  );
+
+  const now = Date.now();
+  if (existing.length > 0) {
+    return await db.update(tenant_invites)
+      .set({ lease_id, updated_on: now })
+      .where(eq(tenant_invites.id, existing[0].id))
+      .returning();
+  }
+
+  // Create a new invite linking to this lease
+  return await db.insert(tenant_invites).values({
+    id: crypto.randomUUID(),
+    landlord_id: lease.owner_id,
+    property_id: lease.property_id,
+    lease_id,
+    available_on: null,
+    invited_emails: JSON.stringify([]),
+    created_on: now,
+    updated_on: now,
+  }).returning();
+}