How to Fake Built-Ins with IKEA Billy Bookcases (No One Will Know!)
Fake It Till You Build It (In-Style)
You know what’s wild? Real built-ins can cost more than your monthly rent. Yeah, no thanks. But here’s the thing: with a little imagination (and a screwdriver), you can absolutely fake the look of custom built-ins using the ever-iconic Billy bookcases from IKEA.
I did it. I lived to tell the tale. And now I’m giving you the blueprint—minus the splinters.
Why Billy Bookcases Are the MVP of DIY Built-Ins
So, why does the Billy bookcase hack have a cult following on Pinterest and TikTok?
They’re affordable (we’re talking under $100 per unit, FYI)
They come in multiple heights and widths
They’re basic in the best way (translation: easy to customize)
Ever walked past a fancy library wall and thought, “That could be me”? Spoiler: it can be.
Step-by-Step: How to Fake Built-Ins With Billy Bookcases
Step 1: Measure Like a Pro
Don’t skip this. Seriously.
Measure the full length of your wall
Measure the ceiling height (because yes, height matters here)
Sketch it out on paper or an app (even a napkin doodle helps)
You want your Billy bookcases to fit snugly without awkward gaps.
Step 2: Choose Your Bookcase Layout
Now that you’ve got your wall’s measurements, decide how many units you’ll need.
Use taller bookcases (like the 79″) for dramatic height
Combine widths: 15”, 31”, or 40”
Add Billy height extenders if you want to go all the way up
Pro tip: Leave a few inches on either side for trim later. Trust me.
Step 3: Build and Anchor the Units
Assemble each Billy (they’re basically adult LEGOs).
Line them up flush against the wall
Anchor them for safety (especially if kids or pets are involved)
Screw the frames together to prevent shifting
This step is where the transformation starts to get real.
Step 4: Fill the Gaps and Add Trim
This is where the illusion happens, my friend.
Use wood filler strips or MDF boards to close the space between each bookcase and the wall/ceiling
Add crown molding and baseboards for a legit built-in finish
Caulk everything. Like, everything. It makes it look seamless
This is the magic moment. This is when people say, “Wait, you didn’t hire a contractor?” 🙂
Step 5: Paint or Leave It Neutral
If you want your built-ins to match your walls perfectly:
Paint everything (bookcases included) with the same finish and color as your wall
Use primer first, especially on that slick IKEA surface
Not into painting? White Billys look crisp and modern as-is. No judgment.
Styling Tips: Make It Look (without spending)
Even if you nailed the structure, your styling has to keep up. Otherwise, it’s just a bunch of shelves.
Here’s how to bring in those quiet luxury vibes:
1. Curate, Don’t Clutter
Mix books with decorative objects (think: ceramic vases, glass domes, minimal sculptures)
Stick to a neutral color palette with a few pops of gold, black, or greenery
Leave some negative space. Your shelves don’t need to be packed
2. Play With Texture and Height
Use stacked books to elevate small objects
Incorporate different materials: wood, linen boxes, matte metals
Place taller items (like frames or candlesticks) at the ends for balance
3. Light It Up
Install puck lights or LED strips to highlight each shelf
Battery-operated lights = no electrician needed
Warm light makes everything look way more expensive
Common Mistakes (That You Don’t Have to Make)
Learn from my chaos:
Not anchoring the bookcases – shaky shelves are not chic
Skipping trim – the biggest giveaway that it’s not custom
Using mismatched paint finishes – flat vs. eggshell = patchy
Overstuffing the shelves – less is more, promise
Real Talk: Is the Billy Bookcase Hack Worth It?
Short answer? YES.
IMO, this is one of the best beginner-friendly DIY projects out there.
Budget-friendly
Rental-safe (if you skip painting or secure trim with removable adhesive)
Major visual payoff
Plus, you get to say you built a custom feature wall. Which, let’s be honest, sounds kind of boss.
Ebook Conversion Bonus Tip
If you’re creating a home styling ebook or DIY guide, this hack is content gold.
Add before-and-after photos of the Billy setup
Include your materials list with affiliate links
Break the steps into printable checklists
Quiet luxury meets passive income. You’re welcome 😉
Final Thoughts
You don’t need a trust fund or a celebrity designer to live in a space that feels curated and expensive. You just need a few Billy bookcases, a weekend, and some caulk.
If you’ve been side-eying your blank living room wall for months, this is your sign. Fake those built-ins and make people think you hired a pro.
Bonus points if you tell them it’s a “custom architectural feature” and keep a straight face.
Happy hacking!