Billy Bookcase Kids Room Ideas You Can Actually Pull Off on a Budget

The IKEA Billy bookcase is one of the most flexible pieces of furniture parents have ever had access to — and at £49 to £89 per unit, it is genuinely one of the most budget-friendly, too.

When a kids room needs storage, style, and something that will grow with the child, the Billy delivers on all three counts. From painted built-ins that look bespoke to clever toy display shelves, these billy bookcase kids room ideas prove you do not need a large budget to create a room your child will love spending time in.

Whether you are working with a nursery, a toddler room, or a tweens space, there is a Billy hack here that fits your square footage, your skill level, and your Saturday afternoon.

Why the IKEA Billy Bookcase Works So Well in Kids Rooms

The Billy has been in production since 1978 — designed originally by Gillis Lundgren on the back of a napkin — and its staying power is no accident. Its clean lines, adjustable shelves, and multiple size options make it endlessly adaptable, but the real reason it thrives in kids rooms is its blank-canvas quality.

The frame is sturdy enough to hold books, board games, Lego sets, and display figures without wobbling. The shelves are fully adjustable, meaning the configuration that works for a five-year-old can be rearranged as your child grows. And because Billy units come in narrow and wide sizes, in tall and short frames, parents can build exactly the storage wall they need without custom joinery costs.

Billy units in the UK currently start at £49 for the narrow short frame and go up to £89 for the tall wide version — a price point that makes buying multiple units realistic on a sensible budget.

How to Choose the Right Billy Configuration

Before buying your units, measure your wall carefully and decide whether you want a single statement piece or a full storage wall. Most families working on billy bookcase kids room ideas find that buying two or three units together creates more impact than a single bookcase.

A few things to consider:

• Narrow tall units (40cm wide) are ideal alongside beds or in awkward alcoves
• Wide tall units (80cm wide) are better for full wall storage walls and built-in effects
• Short units (106cm) work well under windows for bench hacks or in rooms with low ceilings
• Height extension units add an extra 35cm and help Billy reach ceiling height for a truly custom look

Always anchor Billy units to the wall using the included bracket — this is non-negotiable in a kid’s room. IKEA includes a wall bracket with every Billy unit.

Paint It Bold — the Easiest Upgrade You Can Do Today

• Save

Paint is the lowest-cost transformation available and the one that produces the most dramatic results. A standard white Billy becomes something entirely different once it is painted in a deep sage, a dusty rose, or a warm navy.

The key is preparation. IKEA furniture has a glossy surface that paint does not naturally grip, so a light sand with fine-grit paper followed by a coat of shellac-based primer — such as Zinsser BIN — is essential before applying your chosen colour. Once primed, use a furniture paint or cabinet enamel rather than wall paint, which can chip and peel with regular use.

For a more nuanced effect, paint only the interior back panel in a bold colour and leave the frame in white or the original finish. Interior designer Melanie Lissack tried exactly this — painting the back panel in a deep oxblood shade while keeping the outer frame in the existing stone tone — and found that decorative pieces popped dramatically against the darker background. It is a technique that costs very little and adds significant visual depth.

For a kids room specifically, consider painting each unit’s back panel in a different pastel — soft yellow, mint, and blush work beautifully together and create a playful, curated look that feels designed rather than flat-packed.

Peel-and-Stick Wallpaper on the Back Panel

If paint feels too permanent or you are renting, peel-and-stick wallpaper on the back panel of a Billy unit is one of the most satisfying and reversible hacks available. The result looks far more considered than a plain white bookcase, and the whole project can be completed in under two hours.

Start by removing the thin cardboard backing — on most Billy units, it slides out from a track at the top once small nails are removed. Cut your removable wallpaper to size, apply it to the panel, smooth out any bubbles with a credit card or squeegee, and reinstall.

For kid’s rooms, look for patterns that work with the room’s theme:

• Animal prints or jungle botanicals for younger children
• Star or constellation prints for a space-themed room
• Geometric tiles or arched shapes for an older child who wants something less overtly childlike
• Grasscloth or textured linen-look papers for a calmer, more Scandi-inspired feel

The biggest advantage of this approach is that it grows with your child. When they inevitably decide they no longer want jungle wallpaper at age eight, you peel it off and apply something new — no damage, no wasted money.

Billy as a Built-In Look Without the Builder Price Tag

• Save

One of the most popular billy bookcase kids room ideas in 2025 is the faux built-in — a wall of Billy units that looks custom-made at a fraction of joinery costs. The technique involves placing multiple units side by side, filling the gaps and joins with MDF strips or wood filler, adding a skirting board along the base, and painting the entire structure in one unified colour.

To achieve a truly seamless result:

• Add MDF strips over the vertical joins to hide the seams between units
• Fill the side gaps between the bookcase and the wall with cut MDF panels and poly filler
• Apply skirting board across the base to conceal the individual unit legs and create one continuous line
• Prime the whole structure with Zinsser BIN before painting in a unified shade

Finished with shiplap detailing, crown moulding at the top, or simple strip moulding on the doors, a Billy built-in can look indistinguishable from something a joiner made — at roughly a third of the cost. Parents on TikTok have documented their Billy built-in projects costing as little as £459 for a full wall, versus thousands for custom cabinetry.

Turn Billy Into a Kids Wardrobe on a Tight Budget

For small bedrooms or rental properties where a standard wardrobe is too bulky, a Billy unit can be converted into a functional kids wardrobe — and it takes up only 11 inches of floor depth.

The most straightforward version involves adding pull-out valet hanging rods inside the unit. A 9.5-inch hanging rod fits neatly within Billy’s 10.25-inch interior depth, instantly turning the bookcase into a small wardrobe rail. Two units side by side give enough hanging space for a young child’s full clothing rotation.

For a more complete look, add IKEA Oxberg doors to the front to conceal the hanging items and give the unit a more finished, furniture-like appearance. Paint the exterior in a colour that matches the room and the result reads as intentional storage rather than improvised.

This is particularly useful in rented properties where drilling into walls for built-in wardrobes is not an option — the entire unit is freestanding and can move with you.

Reading Nook Bench With Hidden Toy Storage

• Save

Two short Billy units — the 106cm height — placed back-to-back under a window create one of the most charming and functional setups in a kids room: a window bench with hidden storage built into both sides.

Place a custom-cut foam pad covered in washable fabric on top for the seat. Add storage baskets to the lower shelves for soft toys, dress-up items, or art supplies. Stack books on the upper shelves and the reading nook essentially builds itself.

For the best result, anchor both units to each other and to the wall before adding the seat cushion. The top surface of a standard Billy is sturdy enough to sit on, but wall anchoring ensures stability for children who tend to clamber onto furniture enthusiastically.

This hack works particularly well in smaller rooms because it uses the often-wasted space beneath a window and combines seating, display, and toy storage in one compact footprint.

Lego and Toy Display Shelves — the Extra Shelf Trick

The standard Billy configuration comes with shelves positioned relatively far apart — ideal for novels and large items, but awkward for the varied-height items that fill most kids rooms. Lego builds, action figures, small trophies, and art supplies all sit in a frustrating sea of dead space between standard shelf positions.

The fix is simple and costs between £12 and £20: buy an extra shelf from IKEA. Adding one additional shelf per unit allows you to create smaller, more usable gaps for display items while still keeping taller sections open for board game boxes or baskets.

Style the shelves intentionally — group Lego builds together, line books in order of spine colour for a visually pleasing effect and use small wicker baskets or fabric bins to contain the smaller items that would otherwise create visual clutter. This approach turns the Billy from a storage unit into a genuine display feature of the room.

Billy as a Room Divider for Shared Kids Rooms

Two children sharing a room need defined personal territory. A tall Billy bookcase — or two placed end-to-end — creates a soft partition that divides the space without closing it off entirely. Shelves on both sides mean each child gets their own accessible storage from their side of the unit.

For stability, a Billy used as a room divider must be secured to the ceiling or wall with a heavy-duty bracket. Never leave a tall freestanding unit unsecured, especially in a room where children play.

Consider a back-to-back configuration: two narrow Billy units placed with backs touching and secured together, giving each side a dedicated display and storage face. Paint each side in each child’s chosen colour for a personalised touch that makes the boundary feel fair rather than imposed.

Styling Tips to Make Your Billy Look Intentional

• Save

The difference between a Billy that looks like a budget bookcase and one that looks like a considered design choice usually comes down to how it is styled, not how much was spent on it.

A few principles that consistently work:

• Use baskets and bins for the bottom two shelves. They contain small items, reduce visual noise, and give the unit a finished look even when the contents are chaotic.
• Leave some breathing room on each shelf. Overfilled shelves look cluttered regardless of how well-organised they are. Remove a third of what you think should go on each shelf.
• Mix orientations. Stack some books horizontally, stand others vertically. This variation prevents the uniformity that makes a bookcase look flat.
• Add a framed print or small plant on a shelf. One or two decorative items per unit signals that the space has been thoughtfully curated.
• Add scallop or arched trim to the shelves. A trending upgrade seen widely in 2025, adding decorative trim to each shelf edge costs very little and gives the unit a bespoke, custom-furniture quality.

Small touches like colourful handles or knobs on Oxberg doors, a strip of LED lighting inside the unit, or a painted interior back panel all compound to create a result that looks expensive and considered.

Small Room, Big Personality — Start with Billy

The Billy bookcase is a starting point, not a limitation. With paint, wallpaper, an extra shelf, or a set of decorative brackets, it becomes exactly the piece your child’s room needs — functional, personal, and completely budget-friendly.

Try one of these billy bookcase kids room ideas this weekend and see how much of a difference a single well-placed, well-styled unit can make in a space. And when they grow out of the jungle wallpaper phase, you will already know exactly how to start again.
Recommended: Pretty and Practical IKEA Nursery Dresser Looks for Every Style.

Frequently Asked Questions

Can you paint an IKEA Billy bookcase?

Yes — and it is one of the most effective ways to upgrade it. Sand the surface lightly, apply a shellac-based primer such as Zinsser BIN, then use a furniture-grade or cabinet enamel paint. This prevents chipping and gives a finish that can withstand daily use in a kid’s room.

How much does a Billy bookcase cost in the UK?

Billy units currently start at around £49 for the narrow short version and go up to £89 for the tall wide frame. Height extension units cost separately, and Oxberg doors add another £20 to £30 per pair depending on the style.

Is the Billy bookcase safe in a kid’s room?

Yes, provided it is secured properly. IKEA includes a wall anchoring bracket with every Billy unit and recommends anchoring to a wall stud. This is essential in any room where children play, and especially if the unit is being used as a room divider or configured in a non-standard way.

What is the easiest Billy bookcase hack for beginners?

Adding peel-and-stick removable wallpaper to the back panel is the lowest-effort and most impactful hack available. No painting, no tools, and no DIY experience required. It takes under two hours and can be reversed completely.

Can a Billy bookcase work as a wardrobe in a kid’s room?

Yes. Adding pull-out valet hanging rods inside a narrow Billy unit creates a compact wardrobe that takes up only 11 inches of floor depth. Adding Oxberg doors and painting the exterior makes the unit look like a freestanding piece of furniture rather than a repurposed bookcase.