Sofa Bed vs Murphy Bed: Which Should You Buy?

A Murphy bed folds vertically into a wall or cabinet when not in use. A sofa bed converts from a sofa into a bed within a single freestanding piece of furniture. Murphy beds usually deliver better sleep comfort because they use a proper full-size mattress, but they need wall installation, which puts them out of reach for most UK renters. Sofa beds are freestanding, need no installation, and work as everyday furniture, which is why they're the more practical choice for flats and rented homes.

Key Takeaways

• A Murphy bed (wall bed) folds vertically into a wall or cabinet. A sofa bed is freestanding dual-purpose furniture that converts between sofa and bed configurations.

• Murphy beds usually deliver better sleep comfort because they use a proper full-size mattress. Sofa beds close the gap with modern designs but still involve some compromise for daily-sleep use.

• Sofa beds are more practical for renters and small flats. They move with you, need no installation, and double as a working sofa; Murphy beds require permanent wall installation.

• Costs are comparable but structured differently. Murphy beds add cabinet and installation costs on top of the bed itself; sofa beds are one purchase with no fitting required.

• Choose based on ownership and function. Own your home and want a hidden dedicated bed? Murphy bed. Rent, want a working sofa alongside, or need to move it? Sofa bed.

What Is a Murphy Bed?

A Murphy bed, also called a wall bed, is a bed that folds vertically into a wall or a purpose-built cabinet when not in use. Invented in the early 1900s by William Murphy, the design frees up the floor space the bed would otherwise occupy, letting the room work as a living room, home office, or studio during the day.

Modern Murphy beds come in a few configurations. The simplest is a metal frame with a mattress that lifts up flush against the wall. More refined versions integrate the frame into a cabinet with shelving, a desk fold-down, or in some cases a sofa mounted to the front of the cabinet (the "sofa Murphy" variant). Whichever style, the defining feature is that the bed is fixed to the wall and folds vertically.

Typical characteristics of a Murphy bed:

• Vertical fold: the bed hinges up against a wall or into a cabinet.

• Full-size mattress: uses a proper mattress designed for regular sleeping.

• Wall installation: the frame is fixed to structural wall studs.

• Cabinet or panel exterior: looks like built-in furniture when folded.

• Dedicated bed function: the space it occupies during the day is an empty floor, not a sofa or other seating.

• Longer setup effort: typically requires professional installation or significant DIY work.

Murphy beds work well for homeowners with a room to dedicate to occasional sleeping (a home office or hobby room that hosts guests), or for studio flats where the owner wants a proper bed but needs the floor space during the day.

What Is a Sofa Bed?

A sofa bed is a piece of freestanding furniture that works as a sofa during the day and unfolds into a bed at night. Modern sofa beds use various mechanisms to transform between the two states, from pull-out designs that hide a mattress inside the frame, to fold-out systems like the FlipBed™ used in our Koala Sofa Bed.

Because a sofa bed is one continuous piece of furniture, it needs no installation, no wall attachment, and no permanent modifications to the room. It arrives, gets positioned where you want it, and doubles as living-room furniture between overnight uses.

Typical characteristics of a sofa bed:

• Freestanding: sits on the floor like any other sofa.

• Dual function: works as a sofa during the day and a bed at night.

• No installation: delivered and positioned; no fitting required.

• Portable: moves with you between homes.

• Range of mechanisms: pull-out, fold-out, click-clack, futon-style.

• Renter-compatible: no permanent modifications to walls or rooms.

Sofa beds work well for renters, flat-dwellers, and anyone who needs their furniture to serve multiple functions in the same space. For a deeper primer on sofa bed types and how each mechanism works, see our What Is a Sofa Bed? guide.

Murphy Bed vs Sofa Bed: Key Differences (+ Comparison Table)

Here's the side-by-side comparison across the factors that matter most when choosing between the two.

Space and Installation

The biggest practical difference between the two categories is installation. Murphy beds are fixed to structural wall studs and require professional or careful DIY installation, plus enough clear floor space in front of the wall to lower the bed. Once installed, the Murphy bed is essentially permanent; moving it means unmounting the cabinet and re-fitting elsewhere.

Sofa beds have no installation requirement. They arrive as one or more boxes, get assembled if needed (our Koala Sofa Bed uses tool-free assembly with slot-and-click design), and get positioned wherever you want them. When you move house, the sofa bed moves with you.

For UK flats and rental properties, this difference alone often decides the category. Landlords typically don't permit permanent wall installations, and even for owners, the cost and disruption of installing a Murphy bed can be significant.

Comfort and Everyday Use

Murphy beds usually win on pure sleep comfort. They use a full-size proper mattress on a proper bed frame, so the sleeping experience matches what you'd get in any dedicated bedroom. If sleep quality is the top priority and you have the space to install one, Murphy beds deliver.

Sofa beds have to make one piece of furniture work for two functions, which involves some compromise. Modern designs have closed most of the historical comfort gap, especially those with dedicated mattresses (like our Koala Sofa Bed with its Kloudcell™ integrated topper) rather than repurposed sofa cushions. But the sleeping surface is typically slightly thinner and less contoured than a standalone mattress on a bed base.

The trade-off is what you get on the other side of the equation. A Murphy bed does nothing during the day; a sofa bed is a working sofa. For everyday living where the sofa gets used far more often than the bed function, sofa beds serve two useful purposes at once.

Cost and Renter-Friendliness

Cost comparisons depend on what's included. Murphy beds typically involve three cost lines: the bed frame and mechanism, the cabinet or wall surround, and the installation (labour if you hire a fitter, or your own time if DIY). Quality Murphy bed setups can climb significantly higher than a standalone bed once all three lines are added.

Sofa beds are one purchase with no fitting cost. Budget sofa beds run cheaper than most Murphy setups; premium sofa beds (like our Koala Sofa Bed) sit in a similar range to a mid-tier Murphy bed but without any installation cost. Ownership also matters: the sofa bed is portable and holds resale value; the Murphy bed is largely tied to the wall it's fitted to.

For renters, the practical advantage of a sofa bed is compounding: no landlord permission needed, no drilling into walls, moves with you between properties, and works as everyday furniture the whole time. For homeowners planning to stay long-term, a Murphy bed can be worth the installation investment if a proper dedicated bed matters more than a working sofa.

Choosing the Perfect Sofa Bed for Your Home

The right choice depends on whether you own or rent, whether you have space for a dedicated bed, and how often the bed function actually gets used.

Choose a Murphy Bed If

• You own your home and can install permanent wall fixtures.

• You have a room that can dedicate space to occasional sleeping (home office, studio, guest room).

• Sleep comfort matters more than the daytime function of the piece.

• You're happy with an empty floor where the bed is when it's not in use.

• You're staying long-term and the installation cost amortises across years.

Choose a Sofa Bed If

• You rent your home or plan to move between properties.

• Your room needs a working sofa as well as an occasional bed.

• Small footprint and everyday flexibility matter more than best-in-class sleep comfort.

• You want a piece that arrives ready to use without installation.

• You want furniture that moves with you rather than a permanent fixture.

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Our Koala Sofa Bed for Small Flats, Design-Led Living Rooms and Family Homes 

Our Koala Sofa Bed is designed for the reality of UK living: flats and terraced houses where furniture needs to work as both a sofa and a bed, without wall installations or landlord permissions. The FlipBed™ fold-out design converts in one motion, the Kloudcell™ integrated topper delivers sleep-grade comfort (not repurposed sofa cushions), and tool-free assembly means it's up and ready to use quickly.

Three ways to look at the same sofa bed depending on your situation:

• Koala Space-Saving Sofa Bed for studios and one-bed flats where a Murphy bed would traditionally be considered.

• Koala Designer Sofa Bed for buyers who want a piece that looks intentional as a sofa, not like a compromise.

• Koala Sofa Bed for Families for households with kids, guests, and everything in between.

All three are the same piece of furniture, backed by our 120-day trial and a 5-year warranty, so you can compare it against a Murphy bed alternative in your own home over multiple weeks.

For more comparisons across sofa bed categories, see our companion guides on Sofa Bed vs Click-Clack and Futon vs Sofa Bed.

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