Most advice about a €150 budget in Paris answers the wrong question. It tells you which neighbourhood is cheaper. That is useful once — and then you still have to choose a room.
The budget is not the decision. What the budget forces you to trade is.
Three things a mid-range rate is paying for
Location. Not the arrondissement number, but the walk. Ten minutes from a metro entrance in the 11th and two minutes from Saint-Paul are different stays, and the second costs more. Whether that difference is worth paying depends on how many times a day you will make that walk — with a suitcase, with a child, at midnight.
Room size. Paris rooms in this segment are small, and the buildings are old. A hotel in a Haussmann building may have no lift, or a lift that fits one person without luggage. That is not a flaw the rate reflects; it is a constant of the housing stock.
Quiet. A street-facing room above a bar in Oberkampf and a courtyard-facing room in the same establishment are not the same product. Most booking platforms do not distinguish them. The hotel knows which is which.
At this budget, you are choosing which two of the three to keep.
Where the trade-off usually lands
Travellers who prioritise walking distance tend to end up in the Marais or around Saint-Paul — Hôtel Caron de Beaumarchais, Grand Hôtel Malher, Hôtel Jeanne d'Arc le Marais are all within that perimeter. The compromise is room size.
Travellers who prioritise space tend to move east, towards Oberkampf, République or Nation. Cosmos Hôtel Paris, Le Petit Oberkampf, Hôtel Marais Bastille sit in that band. The compromise is that you will use the metro more than you expected.
Travellers who prioritise transport connections tend to choose Châtelet or the Grands Boulevards — Hôtel Relais des Halles, Hôtel Korner Châtelet, Hôtel Chopin. The compromise is noise and crowds during the day.
None of these is the right answer. They are three different stays.
Who this does not suit
If you are coming for two nights and will spend both of them in the centre, the eastern option costs you more in time than it saves in money. Do not optimise for space you will not sit in.
If you are travelling with someone who has difficulty with stairs, neighbourhood is secondary. Confirm the lift before anything else — and confirm it by asking the hotel, not by reading a listing.
If your dates fall on a weekend in June or during a trade fair, this entire analysis shifts. Rates in Paris are not a property of the hotel; they are a property of the week.
What we do not know yet
We do not publish rates. Pricing in this segment moves weekly and any figure written here would be wrong by the time you read it.
What we can tell you is which establishments sit where, and what each position costs you in something other than money.
If you run one of these hotels and want to correct or complete what is written about your property, the profile is open.