Transforming a living space often comes with a desire for both style and functionality, especially in a compact area like a powder room. Last week, I gave you a glimpse into the serene and elegant makeover of our powder room. A cornerstone of this transformation was the ingenious decision to repurpose an old sideboard, breathing new life into it as a charming and practical sink vanity. This project not only added a unique touch to the room but also allowed us to achieve a high-end look without the exorbitant price tag, truly embodying the spirit of resourceful DIY.

Today, I’m excited to pull back the curtain and share the detailed journey of how we transformed this overlooked piece of furniture into a functional and beautiful sink vanity. This step-by-step guide will walk you through every aspect of the conversion, from initial planning to the final touches, demonstrating that with a little creativity and effort, you can achieve stunning results and save a significant amount of money on your home renovation projects.
When I embarked on gathering inspiration for our powder room, one particular sink vanity from Pottery Barn immediately caught my eye. Its elegant design and timeless appeal were exactly what I envisioned for the space. However, the accompanying price tag of $2,299 was a stark reminder that sometimes, dreams need a dose of DIY reality. My goal was to replicate that sophisticated aesthetic on a much more manageable budget, proving that luxury doesn’t always have to come with a hefty price tag.

Initially, I contemplated the ambitious task of building a vanity completely from scratch. While a rewarding challenge, it seemed like an unnecessary endeavor when I remembered an old sideboard we had. This piece, which once graced our kitchen in our previous home, was sturdy, stylish, and had ample potential. It consisted of a main sideboard cabinet and a separate top cabinet that rested on it. When we relocated to Lake Murray, the bottom section of the sideboard, a piece with much sentimental value, found itself without a designated spot. It sat patiently in our bedroom, waiting for its next purpose.

As fate would have it, this “homeless” sideboard turned out to be the perfect fit for the powder room. Its dimensions were ideal, and its existing character promised to add a unique, custom feel to the space. This serendipitous discovery solidified our decision to repurpose it, embarking on a DIY adventure that would result in a truly one-of-a-kind bathroom vanity. Repurposing not only saved us money but also gave a beloved piece of furniture a beautiful new life, aligning perfectly with sustainable living practices.
How to Repurpose a Sideboard into a Chic Sink Vanity for Your Bathroom
The journey to transform a simple sideboard into a sophisticated sink vanity requires careful planning and execution, but the results are incredibly rewarding. The sideboard I chose featured two small drawers at the top, two cabinet doors below them, and one large drawer at the bottom. The beauty of this project is its adaptability; you can achieve similar results with a dresser or even a sturdy desk, provided the chosen piece offers sufficient clearance for both the sink basin and the necessary plumbing. A few years ago, I had already given this piece a stylish update with chalk paint and a beautiful faux Carrara marble technique on its top, which was then sealed with layers of buffed paste wax for durability. This existing finish added to its charm and made it an even more ideal candidate for conversion.
Essential Supplies and Tools for Your DIY Sink Vanity:
- Sideboard or Dresser: Your chosen piece of furniture that will become the vanity. Ensure it’s sturdy and the right dimensions for your space.
- Drop-In Bathroom Sink with Template: We selected a Glacier Bay Aragon Self-Rimming Drop-In Bathroom Sink from Home Depot. A drop-in sink is ideal for this project as its rim sits on the countertop, covering any minor imperfections in the cut.
- Faucet and Plumbing Connections: Choose a faucet that complements your sink and bathroom style. Ensure you have all the necessary supply lines and drain assembly. We used this faucet.
- Jigsaw: Crucial for cutting the sink opening and making precise cuts for plumbing clearance.
- Circular Saw: Useful for larger, straight cuts, especially if modifying shelving or the back panel.
- Drill and Drill Bit: Needed to create a pilot hole for the jigsaw blade and for attaching any new internal structures.
- Tape Measure: For accurate measurements of the sink, plumbing, and furniture.
- Pencil: For marking cut lines and tracing templates.
- 1/4″ Plywood: Used to create a new shelf within the vanity for storage.
- Band-It Iron-On Wood Veneer + Trimmer: Essential for giving plywood edges a finished, professional look.
- Iron: To apply the iron-on wood veneer smoothly.
- Liquid Nails Adhesive: For securely attaching modified drawer fronts and internal shelving.
- Baskets (e.g., IKEA): For organized, open storage within the vanity.
- Paint and Paint Brush: To refresh the vanity’s look or match it to your bathroom decor, and to finish new plywood elements.
Before you begin cutting, remember to prioritize safety. Always wear appropriate eye protection and ensure your workspace is well-lit and clear of obstructions. Double-check all measurements to avoid costly errors, as once you cut into the furniture, there’s no going back.

Step-by-Step Vanity Transformation Guide:
- Prepare the Sink Cutout Template: Your drop-in sink should come with a paper cutting template. This template is your guide for the perfect sink opening. To transfer the outline accurately, turn the template to its wrong side. Using a pencil, firmly trace over the oval shape. The impression of the graphite will be visible through the paper. Once traced, flip the template back to the right side and carefully position it onto the vanity top, ensuring it’s perfectly centered where you want the sink to sit. Trace over the oval again with your pencil on the right side of the template.

2. Transfer the Template to the Vanity Top: The magic of this technique lies in the graphite transfer. As you draw over the oval on the right side of the template, the pressure from your pencil will transfer the graphite from the penciled oval on the wrong side directly onto the vanity top. This creates a clear, precise outline on your furniture piece, ready for cutting. Take your time during this step to ensure the outline is crisp and accurate, as this will dictate the fit of your sink.


3. Cut the Sink Opening: With your template clearly marked, it’s time to cut. Use a drill and an appropriately sized drill bit to create a pilot hole somewhere within the traced oval. This hole needs to be large enough to comfortably insert your jigsaw blade. Once the pilot hole is made, carefully insert the jigsaw blade and begin cutting along the traced oval line. Maintain a steady hand and a slow, controlled pace to ensure a clean, smooth cut. This step is a defining moment for your vanity, so precision is key. Periodically check the fit of your sink as you cut, but do not drop it in completely until later.

4. Remove Drawers for Plumbing Clearance: As you can see from the image, the sink opening is now complete. The next crucial step is to create space for the sink basin and its associated plumbing. This involves removing the existing drawers from the sideboard. For our particular sideboard, this meant taking out the three drawers (two small, one large) located directly beneath the planned sink area. These drawers, in their original form, would obstruct the sink and plumbing, so their removal is necessary to create the hollow space needed within the vanity cabinet.
5. Remove Obstruction Rails: In many furniture pieces, structural elements like center rails separate drawers. For our sideboard, a center rail that once divided the two top drawers had to be removed. This ensures unobstructed space for the sink’s underside and plumbing components. Use a jigsaw or appropriate tool to carefully cut and remove any internal wooden supports or rails that would interfere with the sink or the vertical run of the plumbing pipes.

6. Create Plumbing Access Points: With the internal space cleared, you now need to create openings for the plumbing pipes that connect to the wall. This typically involves cutting sections from the back panel and potentially the bottom of the sideboard. Carefully measure the exact locations of your hot and cold water supply lines, as well as the drain pipe coming from the wall. Using your jigsaw, cut out enough space to allow the vanity to sit flush against the wall while accommodating these pipes. Ensure these cutouts are slightly larger than the pipes themselves to allow for easy installation and future access if needed.

7. Position the Vanity: With all the necessary cuts made, it’s time to move your repurposed sideboard into its final position in the powder room. This is often a two-person job. My husband, Ed, helped me carefully slide the sideboard into place, ensuring that all the plumbing pipes aligned perfectly with the cutouts we made in the back and bottom panels. Take your time here to ensure a snug fit against the wall and proper alignment, as this will make the plumbing hook-up much smoother.

8. Install the Sink and Faucet: Now for the satisfying part – dropping in the sink! Carefully lower your drop-in sink into the prepared opening on the vanity top. Once the sink is in place, install the chosen faucet according to the manufacturer’s instructions. This usually involves securing it from underneath the vanity with nuts and washers. Ensure all connections are finger-tight before moving on to the actual plumbing.

9. Connect the Plumbing: This step is critical for a functional sink. Ed, with his plumbing expertise, took charge here. He needed to purchase new plumbing fittings because our previous sink drain was significantly lower and further back, requiring adjustments for the new vanity setup. We acquired two new connectors for the hot and cold water supply lines and an adjustable pipe for the drain. Carefully connect the hot and cold supply lines to the faucet, and then attach the drain assembly from the sink to the wall drain pipe. Ensure all connections are secure and tightened properly to prevent leaks. Run the water briefly to check for any drips or leaks before proceeding.

10. Reintegrate Drawer Aesthetics: Once the plumbing was successfully attached and tested, we encountered a challenge: the original drawers could no longer be fully reinserted because the sink basin now occupied a significant portion of their internal space. Simply leaving gaping holes where the drawers once were would detract from the vanity’s aesthetic. Our solution was to create “fake” drawer fronts, preserving the original look of the sideboard while allowing for the necessary sink clearance.

11. Modify Drawer Fronts: To create these fake drawers, we carefully cut the fronts off each of the original drawers. I made sure to leave about two inches of material on each side of the cut drawer fronts. This extra margin provided a surface to apply Liquid Nails adhesive, allowing us to securely glue these panels back into their original positions. The result is a seamless, decorative façade that maintains the sideboard’s original charm, making it appear as if the drawers are still functional, when in fact they are now purely aesthetic components.


12. Install Internal Shelving for Storage: Instead of retaining the large bottom drawer (which would also be affected by plumbing), we opted for practical open storage. We cut a piece of 1/4″ plywood to fit precisely into the space where the large drawer once resided. This plywood piece forms a new, sturdy shelf. This design choice maximizes storage potential and is perfect for housing decorative baskets, allowing for easy access to toiletries and other bathroom essentials while keeping the space organized and visually appealing.
How to Create a Professional Finished Edge on Plywood
One common challenge when working with plywood is its unfinished edges, which can look raw and detract from the overall aesthetic of a piece. To achieve a polished, furniture-grade finish on our new plywood shelf, we used iron-on wood veneer edging. This product is incredibly user-friendly and an excellent solution for concealing unsightly plywood layers. Available in various widths at most home improvement stores (typically found in the lumber aisle), it allows you to create a seamless edge that looks like solid wood.


- Prepare the Plywood Edge: Begin by thoroughly sanding the edge of your plywood with 100-grit sandpaper. This creates a smooth, clean surface for the veneer to adhere to. After sanding, use a tack cloth or a damp rag to carefully wipe away all sanding grit and dust, ensuring the edge is free of any particles that could prevent proper adhesion.

2. Apply the Iron-On Veneer: Cut a piece of the wood veneer slightly longer than the edge you intend to cover. Position the veneer strip along the plywood edge, ensuring it’s centered. Then, using a standard household iron set to a medium-high heat (without steam), slowly press the iron along the veneer. The heat activates the adhesive on the back of the veneer, bonding it to the plywood. Apply firm, even pressure and move the iron steadily along the entire length. The veneer adheres remarkably quickly, often within seconds. For added security, you can gently rub a wooden block or roller over the freshly applied veneer while it’s still warm to ensure maximum contact and adhesion.


3. Trim Excess Veneer: Once the veneer is firmly adhered, trim any excess material from the ends using sharp scissors or a craft knife for a clean, straight cut.
4. Refine the Edge with a Trimmer: For a perfectly flush finish, use a dedicated Band-It Edge Trimmer or a sharp craft knife to carefully trim any overhang along the width of the plywood edge. These tools are designed to remove the slight excess veneer that extends beyond the plywood, creating a smooth, professional-looking seam. Work slowly and carefully to avoid damaging the veneer or the plywood. Once trimmed, your plywood will have a beautifully finished edge, ready for painting or staining, making it indistinguishable from a higher grade of lumber.

After the veneer was expertly trimmed and polished, the plywood shelf was ready for its final transformation. We securely attached the finished plywood shelf inside the vanity using Liquid Nails adhesive. This strong adhesive ensures the shelf remains firmly in place, providing a stable base for our storage solutions.

To match the pristine aesthetic of the powder room, I painted the newly installed shelf with two coats of crisp white paint, choosing a satin finish for a subtle sheen and easy cleaning. Allowing ample drying time between coats ensured a smooth, durable, and professional-looking surface.

Finally, to complete the storage aspect, I placed three IKEA baskets onto the shelf. However, a clever modification was needed for the center basket: since the main plumbing line runs directly through the center of the vanity, I had to cut the middle basket in half. Using a hand saw, I carefully split the basket and then repositioned the two sections, overlapping them slightly to create a much smaller, custom-fit basket that cleverly concealed the plumbing while maintaining the visual continuity from the front. This ingenious solution allowed us to maximize storage around the plumbing, offering practical organization for toiletries and other essentials.
Creating this custom sink vanity from a simple sideboard proved to be a far more straightforward and enjoyable project than I had initially anticipated. The most challenging aspect, surprisingly, wasn’t the intricate cuts or the plumbing, but rather the initial leap of faith in making that first cut into the furniture top. Once the hole for the sink was cut, there was no turning back—you are fully committed to its new purpose. However, the thrill of seeing the vision come to life, piece by piece, was incredibly motivating. I am absolutely thrilled with the outcome; it’s a beautiful, functional centerpiece for our powder room. Best of all, by choosing to DIY and repurpose, we saved ourselves a thousand dollars or more compared to purchasing a new vanity, proving that style and savings can indeed go hand-in-hand.
To delve deeper into the complete transformation of this powder room, including all the stylish updates and budget-friendly decor ideas, click here: Quiet Chic: Powder Room Makeover

Curious about how to achieve that luxurious countertop finish? Learn how to paint a stunning faux Carrara Marble top with my detailed guide. It’s an easy technique that adds an elegant touch to any surface: Faux Carrara Marble Painting Technique