diff --git a/src/rooms.test.ts b/src/rooms.test.ts
new file mode 100644
index 0000000..2abbd93
--- /dev/null
+++ b/src/rooms.test.ts
@@ -0,0 +1,77 @@
+import { MatrixRoomPresets, RcRoomTypes, mapRoom } from './rooms'
+
+const roomCreator = {
+  _id: 'roomcreatorid',
+  name: 'RoomCreator',
+  username: 'RoomCreator',
+  roles: [],
+  __rooms: [],
+}
+
+test('mapping direct chats', () => {
+  expect(
+    mapRoom({
+      _id: 'aliceidbobid',
+      t: RcRoomTypes.direct,
+      usernames: ['Alice', 'Bob'],
+      uids: ['aliceid', 'bobid'],
+    })
+  ).toEqual({
+    is_direct: true,
+    preset: MatrixRoomPresets.trusted,
+    creation_content: {
+      'm.federate': false,
+    },
+    _creatorId: 'aliceid',
+  })
+})
+
+test('mapping public rooms', () => {
+  expect(
+    mapRoom({
+      _id: 'randomRoomId',
+      fname: 'public',
+      description: 'Public chat room',
+      name: 'public',
+      t: RcRoomTypes.chat,
+      u: roomCreator,
+    })
+  ).toEqual({
+    preset: MatrixRoomPresets.public,
+    room_alias_name: 'public',
+    name: 'public',
+    topic: 'Public chat room',
+    creation_content: {
+      'm.federate': false,
+    },
+    _creatorId: roomCreator._id,
+  })
+})
+
+test('mapping private rooms', () => {
+  expect(
+    mapRoom({
+      _id: 'privateRoomId',
+      name: 'private',
+      fname: 'private',
+      description: 'Private chat room',
+      t: RcRoomTypes.private,
+      u: roomCreator,
+    })
+  ).toEqual({
+    preset: MatrixRoomPresets.private,
+    room_alias_name: 'private',
+    name: 'private',
+    topic: 'Private chat room',
+    creation_content: {
+      'm.federate': false,
+    },
+    _creatorId: roomCreator._id,
+  })
+})
+
+test('mapping live chats', () => {
+  expect(() =>
+    mapRoom({ _id: 'liveChatId', t: RcRoomTypes.live })
+  ).toThrowError('Room type l is unknown')
+})
diff --git a/src/rooms.ts b/src/rooms.ts
new file mode 100644
index 0000000..df7afe6
--- /dev/null
+++ b/src/rooms.ts
@@ -0,0 +1,88 @@
+import log from './helpers/logger'
+import { getAccessToken } from './helpers/storage'
+import { axios, getUserSessionOptions } from './helpers/synapse'
+import { RcUser } from './users'
+
+export const enum RcRoomTypes {
+  direct = 'd',
+  chat = 'c',
+  private = 'p',
+  live = 'l',
+}
+
+export type RcRoom = {
+  _id: string
+  t: RcRoomTypes
+  uids?: string[]
+  usernames?: string[]
+  name?: string
+  u?: RcUser
+  topic?: string
+  fname?: string
+  description?: string
+}
+
+export const enum MatrixRoomPresets {
+  private = 'private_chat',
+  public = 'public_chat',
+  trusted = 'trusted_private_chat',
+}
+
+export type MatrixRoom = {
+  room_id?: string
+  name?: string
+  creation_content?: object
+  room_alias_name?: string
+  topic?: string
+  is_direct?: boolean
+  preset?: MatrixRoomPresets
+  _creatorId?: string
+}
+
+export function mapRoom(rcRoom: RcRoom): MatrixRoom {
+  const room: MatrixRoom = {
+    creation_content: {
+      'm.federate': false,
+    },
+  }
+  rcRoom.name && (room.name = rcRoom.name)
+  rcRoom.name && (room.room_alias_name = rcRoom.name)
+  rcRoom.description && (room.topic = rcRoom.description)
+
+  switch (rcRoom.t) {
+    case 'd':
+      room.is_direct = true
+      room.preset = MatrixRoomPresets.trusted
+      room._creatorId = rcRoom.uids?.[0]
+      break
+
+    case 'c':
+      room.preset = MatrixRoomPresets.public
+      room._creatorId = rcRoom.u?._id
+      break
+
+    case 'p':
+      room.preset = MatrixRoomPresets.private
+      room._creatorId = rcRoom.u?._id
+      break
+
+    default:
+      const message = `Room type ${rcRoom.t} is unknown`
+      log.error(message)
+      throw new Error(message)
+  }
+  return room
+}
+
+export async function createRoom(rcRoom: RcRoom): Promise<MatrixRoom> {
+  const room: MatrixRoom = mapRoom(rcRoom)
+  room.room_id = (
+    await axios.post(
+      '/_matrix/client/v3/createRoom',
+      room,
+      await getUserSessionOptions(room._creatorId!)
+    )
+  ).data.room_id
+
+  return room
+}