Choosing between people when you have the spare room

You’ve had eleven messages, shown four people round, and two of them were fine. Now you have to choose, and the thing you’re choosing is who is in your kitchen at eight in the morning for the next year.

This is the side of the process with the least written about it and the most at stake, because you don’t get to leave. It also has a constraint the other side doesn’t: where you are advertising and selecting, there may be law about how you do it, and that law varies considerably by jurisdiction.

The boundary comes first

Race, religion, national origin, disability, family status, sex and sexual orientation are not screening criteria — not here, not in your advert, not in your head. That is the ethical position of this site and it isn’t negotiable.

Separately and practically: in many places selection and advertising in housing are regulated, and how much of that applies to a live-in owner choosing a housemate differs enormously between jurisdictions. Some places have specific exemptions for shared living; some don’t; some regulate what you may write in an advert even where they don’t regulate whom you may choose. Your local tenant or housing service will tell you what applies to your situation, and it is worth a single phone call before you write a listing.

The useful thing to know is that this restricts nothing you actually need. Everything below is about schedules, habits, money and communication, and those are what determine whether a share works.

What predicts a good year

Compatible hours, or deliberately incompatible ones. Two people on the same schedule share a bathroom queue. Two people on opposite schedules share nothing and one sleeps while the other is awake through a thin wall. Both work. What doesn’t work is discovering which you’ve got in month two.

How much they’d be home. Working from home has become the largest single determinant of what a shared flat is actually like — heating, kitchen use, calls, whether the living room is a workspace — and it’s frequently not discussed. Ask directly.

A plausible answer about the last place. Why they’re leaving, how long they were there, and whether anything in their account of a past problem was their own fault. A pattern of very short stays is a real signal; one short stay is a life event.

Whether a partner would effectively be resident. The most common houseshare grievance and close to impossible to renegotiate later. The question is not “do you have a partner” but “would they be around much”.

Whether they were easy to deal with. Replied promptly, arrived when they said, answered questions without a saga. This predicts the whole arrangement better than almost anything else, because it’s a sample of how they handle ordinary admin — which is most of what living together consists of.

Certainty about dates. Someone who knows when they’d move in and roughly how long they want is a much lower-variance proposition than someone who doesn’t.

What doesn’t predict anything

Self-reported tidiness. Everyone says seven. It carries no information. Ask what the kitchen is like in their current place instead and listen to what they choose to describe.

Social smoothness at the viewing. This is a strange conversation for both of you. Nervousness, bluntness and over-explaining predict nothing about whether someone is good to live with.

Similarity to you. Tempting and mostly a mirage. What matters is whether specific habits collide, not whether you’d be friends.

Age, occupation, or how impressive their job sounds. Differences, sometimes strong ones, never merit criteria.

Running a fair process

Three things make it better for everyone and cheaper for you.

State the constraints in the advert. The household size, the hours, whether it’s a social house or a private one, the date, the minimum stay. A vague listing produces thirty useless messages; a specific one produces eight useful ones. Do not, in the process of being specific, write anything about who people are — see the boundary above, and the wording notes in what a listing tells you.

Involve the other housemates. A resident who wasn’t consulted starts the arrangement with a grievance, and it’s the most avoidable friction in shared housing. It also improves the decision, because they’ll notice things you don’t. Introducing everyone costs an evening.

Ask the same questions of everybody. Partly fairness, mostly that it’s the only way to compare. Four different conversations produce four impressions and no comparison.

Then answer everyone, including the no. A line is enough, and the person you turn down this month is occasionally the person you’re glad to hear from next year.

Flag check

FLAG CHECK — assessing an applicant

  · Vague about why they left the last place,
    or about the dates
                    → press once. Vagueness about
                      facts is the useful signal.

  · Every past housemate problem was entirely
    the other person's fault
                    → pattern worth weighting. Not
                      disqualifying alone.

  · Pushes to skip the viewing and pay a
    deposit to secure it remotely
                    → WALK AWAY. Scams run in this
                      direction too.

  · Offers noticeably above your asking rent
    to be chosen
                    → treat with caution. Rarely
                      what it appears to be.

  · Rates themselves highly tidy
                    → NOT A FLAG. Everyone does.
                      No information.

  · Awkward, nervous, over-explains
                    → NOT A FLAG. Interview
                      conditions.

  · Hours completely unlike the household's
                    → NOT A FLAG. A difference.
                      Weigh it against your walls.

Deciding, and the thing to do next

When two candidates are close, the tiebreaker that holds up best is: which of these two would I rather have an awkward conversation with? Not which is more impressive, not which I liked more in the kitchen. Every share eventually requires one, and the answer to that question predicts more than the rest of the process combined.

Whatever you decide, write the arrangement down before anyone moves in — what goes in it, how anything gets divided, and what happens if someone leaves early are all real questions, and none of them belong on this site. They belong in the agreement, and they belong there before the keys change hands.

What the process can’t tell you

You are making a decision about a year of your daily life from twenty minutes of conversation with a stranger who has an incentive. That is a thin basis and no amount of process thickens it much.

You will not find out that someone is passive-aggressive about the heating, that they have a friend who stays for a fortnight twice a year, or that they are lovely and impossible. Those emerge in month two, on both sides — because they’re screening you too, from the same small sample, and getting it just as approximately right.

What a careful process reliably catches is the person who was vague about facts, the applicant nobody in the house had met, and the pressure to skip a step. Beyond that, choose the one you could talk to when something goes wrong.