Arriving at a coastal guesthouse with the smell of salt in the air and the promise of a proper breakfast is one of the great British pleasures. That pleasure can be dented surprisingly quickly, though, if the room you booked has a bed that's too small, a bathroom down the corridor, or a position directly above the bar. A little forward planning — and a handful of well-aimed questions — will almost always get you the room that suits you.

Start with the Bed: Size Really Does Matter

It is easy to assume a double is a double. In practice, guesthouse doubles vary enormously. Some are a generous 5ft king, others a compact 4ft 6in standard, and a few older properties still offer a 4ft small double that will feel snug for two adults. If you are travelling as a couple and either of you is tall, ask specifically for a king or super-king where one is available.

Singles should think carefully too. A small double can be a lovely treat for one person, but a 3ft single in a box room is a different proposition, particularly for more than a night or two. Twin rooms suit friends and family well, but check whether the beds are full-size singles or narrower 2ft 6in versions — the difference really matters after a long day's walking. If you have a bad back, mention it; many owners keep a note of which rooms have firmer mattresses.

Think About Where the Room Sits in the Building

Position is the most underrated factor in a good night's sleep. Coastal guesthouses are often converted townhouses or Victorian villas, which means thin walls, creaky floorboards and a layout that can put your headboard against a busy staircase.

• Ground floor versus upper floors: ideal if you have mobility concerns or heavy luggage, but prone to street noise and early-morning deliveries.
• Above the kitchen or bar: avoid if you can. Extractor fans and clattering plates carry further than you would think.
• Near the front door: expect arrivals and departures, and possibly a security light shining through the curtains.
• Top floor: usually the quietest, with the best views, but check the staircase — some are steep and narrow.

If you are a light sleeper, say so when you book. Owners know their buildings intimately and will often steer you towards the quietest room available, even if it is not the one you first enquired about.

Private Bathroom or Shared? Know Before You Book

Most coastal guesthouses now offer en-suite rooms as standard, but plenty of older properties still have a mix of en-suite and private-but-separate bathrooms, where the bathroom is yours alone but accessed from the corridor. There is nothing wrong with the latter — it is often excellent value — but you need to know which you are booking. Ask directly: is the bathroom en-suite, private external, or shared? A shared bathroom might mean queuing in the morning, which is fine for some travellers and deeply unwelcome for others.

If you do have an en-suite, check what it contains. A shower over the bath is common and perfectly serviceable, but a walk-in shower is safer if you have knee trouble. Ask whether there is a bath at all if you fancy a soak after a bracing coastal walk.

Look at the View — and the Light

Sea views command a premium for good reason, and on a coastal stay a glimpse of the water can transform the experience. But be realistic about what "sea view" means. It might be a full panorama, or a sliver visible over the rooftops from one corner of the window.

Light matters too. South-facing rooms are bright and warm; north-facing rooms can feel cool and dim, which is welcome in a heatwave and less so in October. If you are sensitive to early sunlight, ask whether the room has blackout curtains — many seaside guesthouses have wonderful big windows and rather inadequate curtains.

Ask About the Details That Make a Difference

Before you confirm, run through a short checklist:

• Storage: is there a wardrobe and drawer space, or just a few hooks? This matters on longer stays.
• Temperature: does the room have its own heating control, and is there a fan for warm nights?
• Wi-Fi: check the strength in the room itself — old stone walls are unforgiving.
• Noise: is there secondary glazing? Seagulls are charming until four in the morning.
• Accessibility: lift access, step-free entry and grab rails are worth confirming rather than assuming.

A quick phone call covers all of this in five minutes. Good owners would far rather answer questions upfront than deal with a disappointed guest at breakfast.

Match the Room to the Trip You're Taking

Think about why you are there. A romantic weekend calls for a king bed, a sea view and a bit of privacy. A walking holiday with friends suits a twin with a powerful shower and somewhere to dry boots. A solo break might be perfect in a small, quiet single at the back, where the price is gentle and the seagulls are distant.

Book the room that fits the trip, ask the questions that matter, and you will spend your coastal stay doing what you came for: sleeping well, breathing deeply and enjoying the sea air.