Nina Hartmann
Author in the guide

Nina Hartmann

Tenant advisor and locking technician Munich

Nina knows the fine print: who is liable for which key and when a landlord really has to swap the lock.

TenancyLocksFair prices
About Nina

From the trade to the guide

Nina knows the fine print: who is liable for which key and when a landlord really has to swap the lock.

Articles by Nina

All articles
Law and tenancy

Rented flat in Rüsselsheim: who pays for the lock and locksmith?

Lost key or broken lock in your rented flat? Who pays depends on the cause. Wear and tear falls to the landlord, the lost key usually to the tenant.

June 11, 2026 · 7 min read
Law and tenancy

Lost your key in Wiesbaden: who pays for the cylinder?

Lost your key? Usually whoever caused the loss pays. But with a master-key system you can push back. Who really pays in Wiesbaden.

June 11, 2026 · 8 min read
Security and burglary protection

Cylinder, multipoint lock, deadbolt: which should you choose?

Cylinder, multipoint lock or add-on deadbolt? Which locking type really suits your door, what it gives you and what it costs, without the sales talk.

June 6, 2026 · 7 min read
Law and tenancy

Berlin tenancy law and locksmiths: who pays for lockouts, handover and lost keys

Locked out, key lost or handing over a rented flat in Berlin: who bears the cost of door opening, a new cylinder or a locking system, and how to avoid expensive mistakes.

May 29, 2026 · 8 min read
Law and tenancy

Locked out in Munich: what a door opening costs and who pays with high rents

Locked out in Munich and wondering what it costs and who pays? Honest prices, the rule for a latched versus a locked door, and how to spot a rip-off.

May 29, 2026 · 8 min read
Law and tenancy

Rented flat in Essen: who pays the locksmith and the cylinder?

Locked out or key gone in Essen? As a rule of thumb the tenant pays what they cause, the landlord pays normal wear. Where the line runs and what it costs.

May 22, 2026 · 7 min read
Law and tenancy

Who pays the locksmith? Tenant, landlord and the legal basics

Locked yourself out and you almost always pay. A lock that failed on its own and the landlord pays. How to prove the cause, keep the invoice right and not get stung when you move out.

May 20, 2026 · 11 min read
Special cases

Securing a garage or cellar door: the underrated weak spot

Burglars rarely take the front door. The garage and cellar are the underrated weak spot. Which hardware holds and what it costs.

May 10, 2026 · 7 min read
Law and tenancy

What German law says about replacing lost keys

Lost a key? What German tenancy law broadly requires, when a whole system may be replaced, and where tenants pay too much.

April 18, 2026 · 7 min read
Emergency and quick help

Safe jammed shut: locksmith or manufacturer, who helps faster?

Safe shut and no way in? Before anyone drills: when the manufacturer is the cheaper fix and when an on-site locksmith genuinely makes sense.

March 27, 2026 · 7 min read
Frankfurt local

24-hour emergency locksmith in Frankfurt: what to check

Locked out at night in Frankfurt? How to recognise an honest 24-hour service before you call, and which prices are still fair after dark.

March 1, 2026 · 7 min read
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