How to Build a Wooden Bathroom Wall Organizer Above the Sink

That empty wall above the bathroom sink was useful space hiding in plain sight.

Instead of leaving the area underneath the mirror completely empty, this project turns it into a compact wooden organizer with multiple open compartments for everyday bathroom items. The finished piece adds storage without replacing the existing vanity, mirror, or sink.

The key is keeping the organizer shallow enough for the bathroom while making the individual compartments useful.

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What We’re Building

The finished project is a wall-mounted wooden organizer positioned directly beneath the existing mirror and above the sink.

The photographs establish the visible geometry and location, but they do not confirm the hidden wall framing, exact fasteners, anchor type, or load capacity. Those details must be verified at the actual installation.

Before You Cut Any Wood

Start by measuring the actual wall.

The supplied reference gives us the visual relationship between the mirror, organizer, backsplash/wainscoting and sink, but it does not provide verified dimensions.

Measure:

• available wall width
• distance between the countertop and mirror
• desired organizer height
• desired depth
• location of wall framing
• position of electrical wiring or plumbing that could be hidden behind the wall

A STANLEY FATMAX 25-Foot Tape Measure is a useful option for taking the measurements and transferring them to your material. The current FATMAX premium model is a 25-foot tape with a double-sided blade and a 17-foot maximum reach. Stanley Tools

For a larger bathroom or when you want to document several measurements, a Bosch GLM 50 C Laser Measure is another comparable option. Bosch currently lists a 165-foot range, area/volume functions and Bluetooth connectivity. Bosch Tools

Do not copy dimensions from the photograph. Use the image for proportions and placement, then measure your own bathroom.

Materials

The exact lumber species and dimensions used in the supplied project cannot be confirmed visually. The finished organizer has a warm natural wood appearance, so choose a straight, stable hardwood or comparable furniture-grade board that fits your budget and bathroom environment.

Main Materials

• Furniture-Grade Hardwood Boards for the organizer
• Wood Glue suitable for interior woodworking
• Pocket-Hole Screws or another appropriate concealed joinery system
• Wall-Mounting Screws and Anchors appropriate for the actual wall construction
• Sandpaper in several grits
• Interior Clear Wood Finish or another bathroom-appropriate protective finish

A useful glue option is Titebond III Ultimate Wood Glue. Titebond describes it as a one-part waterproof wood glue suitable for interior and exterior applications, with water cleanup and an 8–10 minute open assembly time under its stated conditions. Titebond

For this project, the important point is not simply choosing a strong adhesive. The glue should be treated as part of the woodworking joint, not as the sole method of attaching the finished organizer to the wall.

Tools

You can build a project like this with a fairly conventional woodworking setup.

• STANLEY FATMAX 25-Foot Tape Measure
• Franklin Sensors ProSensor M210 Stud Finder
• Klein Tools 48-Inch Level
• DEWALT 20V MAX XR Drill/Driver
• DEWALT 20V MAX XR 5-Inch Random Orbital Sander
• Kreg Pocket-Hole Jig 720PRO
• IRWIN QUICK-GRIP Bar Clamps
• Table saw or track saw for long straight cuts
• Miter saw for crosscuts where appropriate
• Fine-tooth wood blades
• Pencil and marking knife
• Sanding discs/paper
• Safety glasses
• Hearing protection

The Franklin Sensors ProSensor M210 Stud Finder is particularly relevant because the organizer is wall-mounted. The current M210 uses 13 sensors and 21 LEDs, includes a built-in bubble level and live-wire meter, and is designed to detect the full width of studs. Franklin Sensors

That does not mean a stud finder alone proves that a particular mounting point is safe. Confirm the actual wall construction before drilling.

Step 1: Measure the Wall and Establish the Organizer Footprint

Measure the area directly below the mirror.

The organizer should visually sit beneath the mirror rather than drifting too far to either side. The supplied finished reference shows a long horizontal box centered under the mirror and above the sink.

Before cutting anything, mark:

1. overall organizer width
2. overall height
3. desired depth
4. position of each divider
5. mounting height
6. relationship to the countertop and sink

Keep enough clearance for normal sink use.

The exact clearance must be determined from the actual bathroom because the photograph does not provide verified measurements.

Step 2: Locate the Wall Structure

This is one of the most important steps because the organizer is not simply sitting on the countertop.

Use a Franklin Sensors ProSensor M210 Stud Finder or comparable tool to investigate the wall before drilling.

Check:

• likely stud locations
• electrical wiring
• plumbing
• wall finish
• the structure behind the visible paneling or drywall

The supplied photos cannot tell us exactly which studs or anchors were used.

If the organizer will carry bottles, grooming products, or other significant weight, the attachment method needs to be selected according to the actual wall construction.

Never assume that a drywall anchor is automatically sufficient.

Step 3: Plan the Six Compartments

The final organizer visibly uses six open storage compartments.

Before cutting the dividers, create a simple front-view drawing.

The goal is to reproduce the same visual rhythm seen in the reference:

side → compartment → divider → compartment → divider → compartment → divider → compartment → divider → compartment → divider → compartment → side

Do not make the compartments different sizes unless your own measurements require it.

For repeatable layout work, a Kreg Pocket-Hole Jig 720PRO can also be useful when the construction calls for pocket-hole joinery. Kreg currently lists the 720PRO for material from 1/2 to 1 1/2 inches thick and includes its docking station, clamp, drill guide and pocket-hole screws. Kreg Tool

The jig is an optional construction aid, not proof that pocket holes were used in the original project.

Step 4: Cut the Main Wooden Components

Cut the main boards according to your measured dimensions.

The visible project consists of:

• one long front board
• matching side pieces
• interior divider pieces
• the corresponding main box components

Make the divider cuts as consistently as possible because even small variations become obvious when several compartments sit next to one another.

For clean crosscuts, a Bosch GCM12SD 12-Inch Dual-Bevel Glide Miter Saw is a comparable higher-end option. Bosch lists its Axial-Glide system, SquareLock fences and integrated material support among its current features. Bosch Tools

For a single small organizer, renting or borrowing a quality saw may make more sense than buying a large machine specifically for this project.

Step 5: Dry-Fit the Organizer

Do not glue immediately.

Place the boards together on a flat work surface and check the complete box first.

Verify:

• overall width
• overall depth
• divider positions
• square corners
• consistent compartment widths
• flush board edges

This is the stage where mistakes are cheap to fix.

Once glue has been applied, correcting an incorrectly positioned divider becomes much more difficult.

Step 6: Assemble the Wooden Box

Apply a controlled bead of Titebond III Ultimate Wood Glue to the appropriate woodworking joints, then clamp the pieces in position.

Use IRWIN QUICK-GRIP Bar Clamps or comparable woodworking clamps to hold the assembly while the adhesive cures.

If using pocket holes, create them according to the manufacturer’s instructions for your material thickness and screw type.

The finished organizer should have clean, tight joints rather than relying on visible exterior screws.

Remember that the supplied images do not reveal every hidden joint. The exact joinery should therefore be described as a practical build option, not as a verified reconstruction of concealed construction.

Step 7: Install the Interior Dividers

With the main box established, install the divider pieces.

This is where the organizer begins to look like the final reference.

Measure from the same reference edge for each divider rather than measuring each opening independently. This reduces accumulated errors.

Clamp each divider before fastening it.

Check the divider with a square before the joint is permanently secured.

The goal is six clean, visually consistent compartments.

Step 8: Sand the Entire Organizer

Once the assembly is structurally complete, sand all accessible surfaces.

Start with an appropriate medium grit and progress to a finer grit suitable for the finish you plan to apply.

A DEWALT 20V MAX XR 5-Inch Random Orbital Sander is a useful comparable option for this stage. DEWALT currently lists variable-speed operation and an 8,000–12,000 OPM range on its 20V XR 5-inch model. DeWalt

Pay particular attention to:

• front edges
• divider edges
• corners
• end grain
• areas that will be touched frequently

Because this is a bathroom organizer, soften sharp exposed edges rather than leaving them knife-sharp.

Step 9: Apply the Wood Finish

The finished reference shows the natural character of the wood rather than a painted surface.

Choose an interior wood finish compatible with the species you select and the bathroom environment.

An Interior Clear Wood Finish can preserve the natural appearance while giving the surface additional protection from routine moisture and cleaning.

Follow the finish manufacturer’s instructions for:

• surface preparation
• number of coats
• drying time
• sanding between coats
• ventilation
• final cure time

Do not assume that a bathroom automatically requires a waterproof coating everywhere. The correct finish depends on the actual product and exposure conditions.

Step 10: Prepare the Wall-Mounting Method

Before mounting the finished organizer, transfer the mounting locations to the wall.

This is the part of the project where the hidden construction matters most.

The photos do not establish:

• stud spacing
• wall type
• anchor type
• screw size
• mounting bracket design
• actual load capacity

Therefore, choose the mounting hardware based on your real wall.

If you can fasten directly into suitable framing at the required locations, that may provide a different mounting solution than fastening only into drywall. If the wall construction does not provide appropriate framing where needed, use a properly rated anchoring system selected for the actual wall.

Do not rely on ordinary adhesive strips as the primary structural attachment for a wooden organizer carrying bathroom items unless a specific product system is explicitly rated for that application and load.

Step 11: Mount the Organizer

With the mounting method established, carefully position the organizer beneath the mirror.

Check it from several directions before fully tightening the fasteners.

Use a Klein Tools 48-Inch Level or comparable long level to verify that the organizer is visually level.

The final reference is particularly useful here because the organizer reads as a strong horizontal line beneath the mirror. Even a small tilt can become noticeable in that location.

Do not over-tighten fasteners and crush the wood.

Step 12: Test Before Loading It

Before filling the compartments, inspect the complete installation.

Check:

• organizer is level
• mounting points are secure
• no wood is splitting around fasteners
• compartments remain square
• doors and drawers, if any, are unaffected
• sink and countertop remain fully usable
• stored objects will not interfere with normal bathroom use

Start with lightweight items and observe the installation before adding heavier objects.

There is no verified load rating in the supplied references, so do not assign a numerical capacity based on the photograph.

Step 13: Style the Compartments

The final reference shows the organizer being used for everyday bathroom storage, including items such as toothbrushes, grooming products and small containers.

This is where the project becomes more than a woodworking exercise.

Keep the heavier objects toward the lower and more structurally supported portions of the organizer and avoid creating unnecessary concentrated loads.

The goal is useful storage without visually overcrowding the six compartments.

Materials and Tool Buying Guide

The specific branded tools above are comparable recommendations, not claims about the exact tools used to build the photographed organizer.

Structural and Load Considerations

The organizer may look simple, but its wall attachment is the part that deserves the most attention.

The photographs cannot establish a safe universal load rating. Treat the finished organizer as a wall-mounted piece of furniture and size the attachment system for your actual installation.

Bathroom Safety Checklist

Before drilling:

• Confirm the location of studs or appropriate anchors.
• Investigate the possibility of hidden electrical wiring.
• Investigate possible plumbing routes.
• Do not drill blindly around plumbing fixtures.
• Wear eye protection when cutting, drilling or sanding.
• Use hearing protection around loud power tools.
• Keep the organizer clear of the sink’s working area.
• Sand exposed corners and edges.
• Allow glue and finish to cure according to manufacturer instructions.
• Do not load the organizer heavily until the mounting system has been checked.
• Verify applicable local requirements if your installation involves structural modifications.

Estimated Project Cost

Because the supplied references do not provide receipts, quantities, lumber species, dimensions or hardware prices, an exact project total cannot be established.

A realistic planning budget should account for:

If you already own the major woodworking tools, the project can be substantially less expensive than buying an entire tool setup specifically for one organizer.

Common Mistakes

Maintenance and Everyday Use

Because the organizer is installed above a bathroom sink, routine moisture exposure is unavoidable.

Wipe up standing water rather than allowing it to sit on the wood.

For cleaning, use products compatible with the finish you selected. Avoid soaking the organizer or allowing harsh cleaners to remain on the surface.

Periodically inspect:

• wall fasteners
• visible joints
• wood movement
• finish wear
• areas exposed to repeated splashes

If the organizer begins to move, loosen, crack, or pull away from the wall, remove its contents and investigate the attachment rather than simply tightening everything harder.

Final Result

The finished project demonstrates a useful small-space principle: an empty section of wall can become practical storage without replacing the existing bathroom furniture.

The original mirror stays in place, the vanity remains unchanged, and the new wooden organizer creates six accessible compartments directly above the sink.

The biggest lesson is not a particular dimension or brand of hardware. It is the combination of careful measuring, repeatable woodworking, proper wall attachment, and a finish suited to the environment.