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Rooms, rent and rates

Every room carries its own rent, its own internet charge and its own per-unit rates. The defaults you set during setup fill a new room in for you; anything unusual gets overridden on the room itself.

4 min read Updated 2026-08-13

What a room holds

Field	What it is for
Room number	How the room is identified everywhere — on the home screen, on the bill, in the export. Anything you like: 301, A2, Front shop.
Tenant name	Optional. Left blank, the room number stands in for it on the bill.
Contact	The tenant's handle on LINE, WhatsApp, WeChat, KakaoTalk, Zalo or Telegram, so a finished bill can be sent straight to them.
Rent	The fixed monthly amount. It appears on every bill whether or not the meters have been read.
Internet	A second fixed monthly charge. Set it to zero for a room that does not pay it.
Electricity rate	What you charge per unit. Multiplied by the units the meter shows were used.
Water rate	The same, per unit of water.
Opening readings	What the two meters read the day the room starts in Doorbook.

Changing a rate later

Edit the room and change the figure. The new rate applies to the bill you have not closed yet — it does not reach backwards and rewrite months you have already closed, which is exactly what you want: last March's bill should still say what you actually charged last March.

Correcting an opening reading

If you typed an opening figure wrong, edit the room and correct it. Doorbook bills the difference between the two readings, so a wrong opening figure inflates or deflates exactly one month and then corrects itself — but it is far less painful to fix before you close the cycle than after.

The same edit handles a meter that has been replaced or has rolled over past its last digit. Set the opening reading to whatever the new meter starts at.

Grouping rooms into buildings

If you own more than one property, you can group rooms into named buildings so the home screen and the analytics separate them. Creating a building is a Pro feature; every landlord who has not created one simply has a single unnamed group, which is what most people want.

Removing a room

Deleting a room removes it and its history. If the tenant is leaving but the room is not, do not delete it — move the tenant out instead, which keeps the room, its meter readings and its billing history intact and files the tenancy away for the record.