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BILLY Height extension unit, white, 40x28x35 cm
IKEA Family price

BILLY Height extension unit, white, 40x28x35 cm

Price $ 20
20% off, save $5
Regular price: $25
Price valid 23 Dec. 2025 - 19 Jan. 2026 or while stock lasts
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BILLY Height extension unit, white, 40x28x35 cm
BILLY Height extension unit, black oak effect, 40x28x35 cm
BILLY Height extension unit, brown walnut effect, 40x28x35 cm
BILLY Height extension unit, oak effect, 40x28x35 cm

How to get it

Available services

It is estimated that every five seconds, one BILLY bookcase is sold somewhere in the world. Pretty impressive considering we launched BILLY in 1979. It’s the booklovers choice that never goes out of style.

Article Number205.252.76

Product details

With a shelf/height extension unit, you can make the most of the wall area, while freeing up space on the floor.

Designer

Gillis Lundgren

Article Number205.252.76

Good to know

Safety bracket for fixing to wall included.

To be combined with BILLY bookcase 40x202 cm for added storage vertically.

Product is possible to recycle or use for energy recovery, if available in your community.

Keep in mind that you need enough space between the top of the furniture and the ceiling to be able to anchor the product to the wall.

Materials and care

Material

Top panel:
Particleboard, Paper foil, Plastic edging
Side panel/ Back:
Particleboard, Paper foil, Plastic edging, Paper edging

Care

Wipe clean with a cloth dampened in a mild cleaner.

Wipe dry with a clean cloth.

Safety and compliance

Must be anchored to the wall. Different wall materials require different types of fixing devices. Use fixing devices suitable for the walls in your home, sold separately.

Assembly and documents

Assembly instructions

BILLY Height extension unit205.252.76

Advice and care instructions

BILLY Height extension unit205.252.76

Measurements

  • Width: 40 cm
  • Depth: 28 cm
  • Height: 35 cm

Packaging

BILLY

Article Number205.252.76
  • Width: 37 cm
  • Height: 8 cm
  • Length: 38 cm
  • Weight: 5.20 kg
  • Package(s): 1

Reviews

Billy Bookshelf ExtenderFredVery Satisify with the Billy bookshelf extender a good value product.5
Good standard bookcaseJoyUseful bookcase in the size required 5
Take cornices into account before purchase!AlaineBought 3. If my ceiling did not have cornices, they would have fit. Unfortunately the cornices meant they had to come forward and jutted over the front of the bookcase. Sadly they cannot be cut down to fit, so they now sit on my garage floor, made up and of no use.2
Happy with the product- itShawHappy with the product- it made the existing shelving unit look much better.5
Great Product to extend heightTashaGreat Product to extend height of the billy bookcase5
ExtensionAllyssaMakes the book case go all the way to the ceiling and fills the wall. Was really east to put together too5
Do not use height extension for Billy corner unitsErwinWhen assembling a corner unit with Billy bookcases with height extensions on either side, the fittings provided with the extensions do not work.1
Great extra storage ideaLucilleGreat extra storage idea5
Extra extension works well andCaitlinExtra extension works well and looks good overall3
Extending on perfectionLee-AnneExtending on perfection5
Billy is the BOMB!RachelPurchased a Billy set to fill a blank wall and use as a display cabinet and bookcase. It looks amazing. Love it!5

Customer reviews

4.3Average rating
158Reviews
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My bookcase went to new heights!
5
Love this extension to my bookcase! It helps make it more finished and gives more space!
Michelle, United States
Nice addition to Billy line
5
I used these above full-size Billy bookcases as part of a kitchen project. They are easy to assemble and sturdy. With the addition of Oxberg glass doors, the pieces look sophisticated.
Karen, United States
Love my book shelf extensions
5
They look so good and have taken on a whole new look once installing crown moulding. Love love love
Milin, United States

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