What a guest room mattress needs to do#
A guest bed has a unique brief: it's used occasionally, by people of all shapes, sizes and sleeping positions, and you don't want to overspend. The goal is broad comfort and reliable support at a sensible price, not a top-of-the-range bed tuned to one person.
Aim for medium-firm, the universal choice#
Because you can't tailor a guest mattress to one sleeper, pick the firmness that suits the most people. The evidence is clear that medium-firm best supports comfort, sleep quality and spinal alignment across the general population,1 which makes it the safest pick for back, side and front sleepers alike.
Where to save, and where not to#
- Save on: brand name, plush extras and premium covers, occasional use doesn't justify them.
- Don't skimp on: support and basic durability. Cheap, low-density foam softens fast, while quality foams hold their feel for years.2
- Consider a topper: a medium-firm mattress plus a topper lets guests adjust the feel.
Value brands we rate for guest rooms#
- The Foam People: made-to-order all-foam mattresses from around £109, with custom sizes, ideal if your spare room has an odd-sized frame. See our review.
- Luxe (Majestic range): hand-built British models that reach budget territory on sale, with a 100-night trial and 10-year warranty. See our review.
- Emma (on sale): the popular bed-in-a-box rarely sells at full RRP, a polished medium feel most guests will find comfortable.
Practical tips#
- Pick a size up if space allows, a double or larger suits couples and is more versatile than a single.
- Add a breathable protector to keep an occasionally used mattress fresh, see our protector guide.
- Air it before guests arrive if it's been stored or rarely used.
Browse medium-firm mattresses or our best budget mattress guide, or take our quiz for a value-matched pick.
The best guest room mattresses we have scored#
Applying the brief above (medium or medium-firm, reliable support, sensible price, no need for premium extras) to our catalogue gives these picks. The best mattress under £500 list has the full ranked set.
| Mattress | Best for | Firmness | Type | Trial | Our score | Price (double) |
|---|---|---|---|---|---|---|
| Luxe Velour Hybrid | Best guest room mattress overall | Medium | Hybrid | 100 nights | 8.4 | £399 |
| Emma Original Lite | Best budget with a trial | Medium | Foam | 200 nights | 8.3 | £246 |
| The Saffron Comfort Deep | Best under £200 | Medium | Foam | None | 8.5 | £174 |
| Westwood Memory Foam | Cheapest | Medium | Foam | None | 8.4 | £109 |
| Pocket Reflex 1000 | Traditional sprung feel | Medium | Pocket sprung | 100 nights | 8.3 | £399 |
| Majestic 9000 Extra Firm | If guests are mostly heavier / front sleepers | Firm | Foam | 100 nights | 8.5 | £273 (RRP £399) |
Prices are for a double at the time of writing (September 2026), using the sale price where the brand runs a permanent one. Live prices and full scores are on each review page. We may earn a commission if you buy through our links, at no extra cost to you; it never affects a score.
The Luxe Velour Hybrid is the pick because a true medium hybrid is the closest thing to a mattress nobody complains about: springs for support and edges, memory foam and natural fillings for comfort, 28cm deep, and a 100-night trial and 10-year warranty at £399. If the budget is tighter, the Emma Original Lite keeps a trial (200 nights) at £246. Below £200, The Foam People make the best-value foam mattresses we have scored; they carry a 5-year warranty and no trial, which is a reasonable trade for a bed used a few weeks a year.
Sizing a guest room#
Guest rooms are usually the smallest bedroom, and the size decision matters more than the mattress. UK sizes to know:
- Small double (120 x 190cm) is the guest room secret: it sleeps a couple for a few nights, fits a room a standard double will not, and leaves space to walk round the bed. See our small double guide.
- Double (135 x 190cm) is the default if the room takes it. It is the size most guests expect and the size with the widest choice.
- Single (90 x 190cm) only if the room is genuinely tiny or the guests are always solo. Two singles that zip together are more flexible than one double, if you have the width.
- EU sizes if the frame came from IKEA or a European retailer: a UK double will not fit a 140 x 200cm frame. Check the frame before ordering; our EU sizes guide explains the differences.
Sofa beds, folding beds and airbeds#
If the room doubles as an office, the alternatives are worth a paragraph. A sofa bed with a proper sprung or foam mattress (rather than a thin fold-out pad) is comfortable for a weekend; the cheap ones are not, and the bar across the middle is the single most common guest complaint. Folding guest beds with a 10cm-plus foam mattress are better than most sofa beds and store in a cupboard. Airbeds are for one night. If guests stay more than two nights at a time, or an older relative visits regularly, a real mattress on a real base pays for itself in the first year of not apologising.
Looking after a mattress that is rarely used#
- Air it monthly. Strip the bed and leave the mattress uncovered for a few hours with the window open, so moisture that has settled in does not turn musty.
- Protector on, always. Guests spill things and guests sweat; a breathable protector keeps the mattress itself clean and extends its life considerably.
- Rotate it when you change the sheets for a guest. A rarely used mattress does not need frequent rotation, but doing it at every changeover keeps wear even.
- Do not store it on its side long-term if it is a sprung mattress; foam mattresses tolerate this better.
Frequently asked questions#
What firmness is best for a guest bed?#
Medium or medium-firm. The evidence shows medium-firm suits the widest range of sleepers for comfort and alignment,1 and a true medium is the most forgiving if guests vary a lot in size and position.
How much should I spend on a guest room mattress?#
£150 to £400 for a double covers the sensible range. Below that, low-density foam softens quickly even with light use;2 above it, you are paying for features an occasional sleeper will not notice. Spend at the top of the range if the room is used by an older relative or for stays of more than a few nights.
Is a cheap mattress OK for a guest room?#
Yes, if it is cheap because it is simple rather than because it is poorly made. A 20cm-plus foam mattress from a maker with a track record is fine for occasional use. A very thin or very light mattress will not support an adult properly even for one night.
Foam or sprung for a guest room?#
Foam is cheaper, arrives rolled (easier to get up stairs) and suits the widest range of guests. Sprung feels more traditional and sleeps cooler. For a spare room, a medium foam or hybrid is the practical choice.
What size mattress is best for a guest room?#
A double if the room takes it, a small double (120cm) if it does not. A small double is the size most often overlooked and the one that solves most guest room layouts.
References#
- Caggiari G, Talesa GR, Toro G, Jannelli E, Monteleone G, Puddu L. What type of mattress should be chosen to avoid back pain and improve sleep quality? Review of the literature. Journal of Orthopaedics and Traumatology. 2021;22:51. doi:10.1186/s10195-021-00616-5
- Vlaović Z, Klarić N, Domljan D. Investigating the Impact of Long-Term Use on Mattress Firmness and Sleep Quality: Preliminary Results. Applied Sciences. 2024;14(21):10016. doi:10.3390/app142110016
