Buy a flat with someone on your side
We follow you from the first viewing to the bid, flagging what makes a cheap flat expensive: the building's finances and what you pay each month.
9,500+
housing co-ops
100+
checks per analysis
2026
loan and tax rules
The co-op's economy in five seconds
Shared debt per square metre, how the monthly fees are trending and whether a refinancing is coming. What decides if a cheap flat gets expensive after you move in.
What we found
- Debt per m² High
- Pipe job Planned 2027
- Monthly fee Raised recently
- Leasehold No data, ask
What you pay each month
Interest, amortisation and the monthly fee add up to what you actually pay, with your share of the fellesgjeld counted in. Change the rate and watch the sum move.
23 480 kr/mo
At 6% rate: 28 900 kr/mnd
What similar flats actually sold for
We compare it with what similar homes in the area cost, so you can see if the asking price was set low to draw bids.
The neighbourhood you’re moving to
How far to work, the price level in the neighbourhood and the risks that come with the place itself.
Grünerløkka, Oslo
16 min to work
Compare what sets them apart
Put two homes side by side: monthly cost, commute and condition.
Everything to check before the bidding round
A checklist and questions for the agent, tailored to this flat's age and co-op. The budrunde moves fast, so the prep happens beforehand.
How to get started
01.
Paste the link
A link to the listing is all it takes, from most listing sites.
02.
Get a clear verdict
Monthly cost, risks and what to check.
03.
Go to the viewing prepared
A checklist and questions for the agent, for that exact home.
04.
Bid with confidence
You know the monthly cost and where the question marks are.
Numbers you can trust
We keep track of what needs checking and fixing, so you don’t have to hold it all in your head.
- Every number can be adjusted, and you see what it builds on.
- When a figure is missing we say so, rather than guess.
- Amounts, rules and thresholds are checked against official sources.
Ready to check a borettslag flat?
See a finished analysis, or start with a home you're looking at.
Read on
Common questions
What does Heimer cost?
Your first analysis is free. After that, Premium is 399 kr a month for unlimited analyses.
Which sites work?
A link from Finn.no or most agent sites works fine.
Do you find the shared debt?
We read what's in the listing and the sales prospectus. If a figure is missing, we say so plainly instead of guessing.
Is Heimer on the buyer's side?
Yes. We're on your side, helping you understand the listing so you can feel sure about the decision.
Looking for a different property type? House