The nearest answer first

For most bags, the cheapest and closest option is already inside Gare du Nord. The station's own left-luggage lockers sit on the ground level, reached through the exit signed 'Taxi' toward Rue de Maubeuge near Quai 3, and come in three sizes. Nothing needs booking in advance and no bag changes hands with a stranger — you feed the locker directly. For a standard suitcase and a few hours to fill before a train, that's usually the simplest fix. The catch is what happens once a bag is bigger than the largest locker, or once the lockers themselves prove harder to find than expected, which happens more often than it should.

What the lockers cost

Independent pricing guides put the three sizes at roughly €5.50, €7.50 and €9.50 for 24 hours, small to large, though one more recent guide lists the small locker closer to €2.50 — treat that smallest figure as unconfirmed and check the display on arrival rather than budgeting around it. Storage beyond the first 24 hours is billed as a flat extra fee per bag for each additional day, rather than a fresh day at the same rate. The largest locker measures 90cm by 51cm by 82cm; anything bulkier than that — a full hold suitcase, a bike box, awkward sports gear — simply won't go in, whatever you're willing to pay. One older station reference describes a staffed left-luggage counter charging by time band rather than self-service lockers at all; more recent sources consistently describe automatic pay lockers in three sizes, so the staffed-counter version looks out of date.

The app-based alternative

Where the on-site lockers fall short — an oversized bag, a booked-out bank, or simply preferring a shop over a locker hunt — Radical Storage runs a network of independent drop-off points within three to five minutes of the station: shops, a café, an office and a couple of hotels acting as luggage holders. None of them impose a size or weight limit, which the lockers can't match. Pricing across the cluster is quoted from around €3.90 per bag per day, plus a roughly €1.99 fee at checkout covering Radical Storage's stated €3,000 damage, theft and loss guarantee and round-the-clock support. Different Radical Storage pages quote different 'from' prices for this same cluster of shops, so treat any single headline figure as a floor rather than a guaranteed cost, and check the specific listing before paying. Unlike the coin-and-card lockers, every point here needs booking through the app first.

Which drop-off point suits you

Hours vary sharply across the cluster, and that matters more than the exact walking distance. The point closest to the platforms shuts in the early evening; the Boulevard de Denain shop stays open to midnight; the Faubourg Saint-Denis point doesn't open until late morning; the Rue La Fayette shop runs to 10pm; and the Rue de Compiègne office keeps the same schedule every day of the week, Sundays included. None of them match the lockers' near round-the-clock 4:30am-to-1am window, so a very early or very late journey is often still better served by the station's own lockers, provided the bag fits.

Other shops and apps nearby

Radical Storage isn't the only network using local businesses as drop-off points. Nannybag lists 16 partner locations near the station from about €2.50 a day for a small bag, €4.90 for a regular suitcase and €6.90 for odd-sized items, backed by a stated €10,000 guarantee. Stasher advertises more than 50 points around the station from about €1.49 a day with cover up to €12,000 per bag. Bounce lists roughly 540 spots across the city, including specific points on Boulevard de Denain and Boulevard de Magenta, from about €2.25 a day. CityLocker takes a different approach entirely: an automated locker bank just outside the station itself, rather than a staffed shop, priced from about €9 a day down to roughly €2 a day the longer a bag stays, booked online with a locker code sent on confirmation. Reviewers of these third-party partner shops repeatedly describe drop-off and pick-up as quick and staff as flexible when trains run late, a pattern that shows up across operators rather than being specific to one.

Only need a few hours

For a short gap — a late checkout followed by an afternoon before a train, say — an hourly rate can beat a flat daily one. LuggageHero prices its Gare du Nord storage from about €1.29 per hour plus a per-bag service fee, which works out cheaper than a full day's locker fee if the wait is only two or three hours. The station's own lockers, by contrast, charge for a full 24-hour block regardless of how long the bag actually sits there, so a short wait and a full day can cost the same.

The practical choice

If the bag fits within 90cm by 51cm by 82cm and the travel window sits inside the station's 4:30am-to-1am hours, the on-site lockers are usually the cheapest and closest option — just allow a few extra minutes to find the right bank on a level split into two disconnected halves. An oversized bag, a preference for exploring rather than doubling back, or a departure outside those hours points toward one of the walkable shops instead, booked ahead through the app and matched to its specific opening hours. For storage running into several days, it's worth comparing per-day rates directly: some third-party operators price down the longer a bag stays, where the station simply adds the same flat fee for every extra 24 hours.