Original book ideaHorror

The Building Has a Bad Tenant

A caretaker receives rent from an apartment erased from the building plans, accompanied by complaints about the living. A housing inspector helps locate the tenant, but every attempt to enter makes the building surrender another ordinary room to something that considers people a temporary inconvenience.

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How it begins

The rent arrived in an envelope slipped beneath Rosa Lane's door at three in the morning.

The notes were dry. The envelope was wet.

On the front, in careful block letters, someone had written FLAT SIX AND A HALF.

Rosa managed eight flats. None required arithmetic to reach.

She counted the money twice, recorded it as unidentified and placed it in the office safe. By breakfast, a complaint had followed.

The living are making unnecessary use of the stairs.

She telephoned David Price because the housing inspector had once told her that unusual occupancy arrangements were still occupancy arrangements. She hoped he regretted the sentence.

He arrived with the approved floor plan.

'Between six and seven?' he asked.

'That's a wall.'

'Let's begin there.'

They climbed to the second landing. Yesterday the wall had held a notice about recycling. Today a narrow door stood beneath a brass number. The recycling notice hung inside its frosted glass, reversed.

David checked the plan. Rosa checked the door's lower edge. Water glistened beneath it, though the pipework ran on the other side of the building.

From inside came the sound of somebody dragging a chair.

Rosa knocked.

A letter slid out at her feet. It was a copy of the building's original lease, with one additional clause: Existing occupants to be regarded as temporary.

'That's everyone,' David said.

The chair stopped moving.

Behind them, the door to the shared linen cupboard disappeared with a soft settling sound. Rosa turned. Clean paint covered the space where she had put fresh towels that morning.

David reached for his camera, then stopped to check the stairs remained clear.

Rosa held the wet lease away from her coat.

For twelve years she had worried about tenants leaving without notice. She had never considered what to do when a tenant paid promptly and began taking the building instead.

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Develop this idea

Define what accepts the supernatural tenancy and what restitution can end its expansion. The entity should obey a limited contract logic rather than inventing new clauses whenever suspense slows. David's first responsibility is safe occupancy and evacuation, not proving a haunting. Research apartment plans and access requirements for grounding. Rosa's recordkeeping matters because she records uncertainty honestly, and the ending should leave an unsettling residue instead of making the building completely explainable.

Rosa receives rent and complaints from an unlisted flat.
David finds a door absent from approved plans.
Shared rooms disappear after each accepted payment.
The lease describes living residents as temporary occupants.
Rosa learns the building once collected money for an unfulfilled room.
The entity treats ordinary acknowledgment as acceptance of expanding terms.
David arranges safe relocation rather than forcing entry.
They trace the original payment and identify a bounded restitution.
Rosa rejects new rent while returning the unresolved sum through an established rule.
The missing rooms return, but the half-flat's door remains visible and locked.

Characters