Unlock Your Home’s Potential: Common Interior Design Mistakes and How to Fix Them

We’ve all been there. You walk into a home decor store, spot an absolutely stunning lamp, and immediately envision it gracing your bedside table. You bring it home, brimming with excitement, only to find it completely wrong for your bedroom. It’s too small, gets lost in the background, and suddenly that perfect piece feels like a costly mistake and a return trip you simply don’t have time for.
This common scenario highlights a fundamental truth in interior design: beautiful spaces aren’t just about accumulating pretty things. Often, the missteps begin long before a single item is purchased. Achieving a truly harmonious and aesthetically pleasing room demands a cohesive interior design plan. Without it, you risk a disjointed look, wasted money, and endless frustration. Many homeowners skip this crucial planning phase, opting instead to buy items they like and hope they “match”—a strategy that rarely yields successful results.
A well-thought-out design plan involves careful consideration of your chosen color palette, lighting scheme, room dimensions, the scale of your furniture and decor, and optimal furniture placement. These foundational steps are frequently overlooked, which is precisely why comprehensive resources like Designer in a Binder exist. By understanding and proactively avoiding the most prevalent interior design errors, you can transform any space in your home into a beautiful, functional, and inviting environment. In this detailed guide, we will explore the **8 most common interior design mistakes** and, more importantly, equip you with practical, easy-to-follow solutions to rectify them.
The Biggest Mistakes People Make When Decorating + How to Fix Them
Decorating Mistake No. 1: Your home is full of clutter.
One of the most pervasive interior design mistakes is attempting to decorate a space *around* existing clutter. This approach is inherently flawed because, by definition, “clutter” refers to a “crowded or confused mass or collection” of items. A chaotic accumulation of belongings can never truly contribute to a beautiful or serene environment. Instead, it creates visual noise and prevents any thoughtful design elements from shining through.
As emphasized in my affordable design systemDesigner in a Binder®, it is absolutely paramount to declutter your home *before* you embark on any decorating project. Beyond aesthetics, decluttering offers numerous benefits, from reducing stress and improving functionality to making your home easier to clean and maintain. Clearing out unnecessary items provides a clean slate, allowing you to clearly see the potential of your space and make intentional design choices. Start by removing anything that doesn’t serve a purpose or bring you joy, creating an organized foundation upon which to build your ideal interior.
Decorating Mistake No. 2: The scale of your furniture and home decor is totally off.
Scale, in interior design, defines how objects within a room relate to one another in terms of their size and visual weight. When the scale of your furniture, artwork, and decorative accessories is mismatched, the entire room feels imbalanced and uncomfortable. Imagine a sprawling sectional sofa crammed into a tiny living room, or a grand, spacious room dwarfing a minuscule loveseat and a delicate coffee table. These are classic examples of how incorrect scale can derail an otherwise promising design, creating a sense of unease rather than harmony.
Achieving the right scale is crucial for a well-designed space. Here are some straightforward guidelines to help you select furniture and decor that perfectly suit your room’s proportions:
- Generally, larger rooms can comfortably accommodate more substantial furniture and bolder decor pieces. Conversely, the smaller the room, the more appropriate it is to choose furnishings and accessories that are more petite and delicate, such as slim table lamps or smaller decorative accents.
- The most prominent piece of furniture in a room, often a sofa in a living room or a bed in a bedroom, should establish the baseline for the scale of all other items. For instance, pairing a massive sectional with tiny, unobtrusive floor lamps will create an awkward visual disconnect. Ensure supporting pieces complement, rather than clash with, the primary furniture.
- Don’t overlook the vertical dimension of your room. High ceilings allow for taller, more imposing furniture and larger wall art, enhancing the room’s grandeur. Rooms with lower ceilings, however, benefit from furniture with a lower profile to prevent the space from feeling cramped and visually heavy.
- Always remember the importance of “white space” or negative space. This refers to the unoccupied areas around and above your furniture. Resist the urge to fill every corner with items. Leaving some portions of your floor and walls uncovered creates breathing room, allows the eye to rest, and prevents the space from feeling cluttered and overwhelming.
For example, our master bedroom, being generously sized, easily handles oversized artwork in its sitting area. Yet, we deliberately maintained ample “white space” to ensure the room feels open, airy, and inviting, rather than packed.

Decorating Mistake No. 3: All of your furniture is pushed up against your walls.
One of the most prevalent space planning errors is pushing every piece of furniture against the walls. This common practice is often an attempt to make a room appear larger, but it actually has the opposite effect, making the space feel cold, disconnected, and unwelcoming. When furniture is lined up against the perimeter, it creates a “runway” effect, leaving a vast, unused center area that feels empty and uninviting.
Even a subtle adjustment—pulling your furniture off the walls by just a few inches—can dramatically transform the feel of a room. This simple trick allows the space to breathe and creates a more intimate and cohesive arrangement. For larger rooms, “floating” furniture away from the walls entirely, creating distinct zones for conversation or relaxation, is even more effective. You can observe this principle in our family room, where all the furniture is strategically placed away from the walls. Similarly, the furniture in the sitting area of our master bedroom is floated, creating a cozy and defined space in front of the DIY fireplace. This approach fosters a more engaging and functional layout, inviting interaction and comfort.
Decorating Mistake No. 4: Your wall decor is all wrong.
Many homeowners find themselves struggling when it comes to selecting and hanging wall decor. If you’ve ever felt this challenge, you’re not alone! (For a deeper dive, I’ve shared my detailed insights on how to choose artwork that flows seamlessly throughout your home in a dedicated blog post).
Need help choosing artwork? These posts can guide you:
- Bedroom Wall Art: Top Designer Picks
- Living Room Art: Top Designer Picks
- Dining Room Wall Art: Top Designer Picks
The two most common errors I encounter with wall decor are: 1) artwork or decor that is inappropriately sized (most often, it’s far too small for the space it occupies), and 2) pieces that are hung significantly too high. Both mistakes can make a room feel unfinished, awkward, and disproportionate.
Let’s address these common interior design blunders with practical solutions.
Regarding the appropriate size or scale of artwork, several principles come into play. If you’re displaying multiple pieces of art or curating a gallery wall, treat the entire collection as a single unit when determining its scale. This collection should be proportional to the furniture it accompanies. A good rule of thumb is for artwork or an art collection to span at least 50% to 75% of the width of the furniture it hangs above (e.g., a sofa, console table, or bed). Because this concept can be challenging to visualize, I’ve included helpful diagrams below to illustrate this proportion.


Our family room gallery wall serves as an excellent real-world example of treating a curated collection of smaller items as one large, cohesive “piece” of art, perfectly scaled for the wall.

Next, let’s discuss the optimal height for hanging your artwork. The oft-quoted “eye-level” rule is a useful starting point, but it’s not universally applicable. If you’re particularly short or tall, or if your ceilings deviate from standard height, “eye-level” becomes subjective and potentially misleading. A more reliable method is to mentally divide your wall vertically into four equal sections. Aim to hang your artwork so that its bottom edge roughly aligns with the bottom of the second quadrant from the floor. It’s perfectly acceptable for the top of the art to extend into the top quadrant. This technique ensures the art is neither too low nor too high, creating a visually pleasing arrangement that integrates well with the rest of the room. Refer to the diagram below for a clear visual representation of this method.

Decorating Mistake No. 5: Your room doesn’t have a focal point.
Every well-designed room should possess at least one distinct focal point—a specific area or element that immediately draws the eye and anchors the space. In larger rooms, such as our master bedroom, you might even find two or more focal points that work in harmony. What exactly constitutes a focal point? It’s simply the place where your gaze naturally settles upon entering the room, commanding attention and providing a visual anchor.
For some rooms, the focal point is inherently obvious. A grand fireplace in a living room, for instance, is a natural and effortless center of attention. In a bedroom, the bed itself typically serves as the primary focal point, as is beautifully demonstrated in our bedroom. However, due to the spaciousness of this particular room, we also established a secondary focal point within the sitting area, where the DIY fireplace we installed provides a cozy and captivating anchor. Additionally, elements like skylights can introduce architectural interest, further enhancing the room’s character.

Rooms lacking permanent architectural features like fireplaces or built-ins present a more creative challenge, requiring you to *create* a focal point. But there’s no need to panic! A compelling focal point can be as straightforward as a striking large painting, a dramatic tapestry, or even a thoughtfully designed accent wall. In Avery’s room, for instance, the DIY built-in bunk beds, nestled into what was once a closet, didn’t naturally command attention. To address this, we opted for a vibrant wall mural, which now serves as the perfect and undeniable focal point, guiding the eye and setting the room’s entire aesthetic. The crucial takeaway here is that your room requires a clear focal point *before* you finalize your furniture arrangement. Once established, you can strategically place your furnishings to complement and highlight this central design element, creating a balanced and visually engaging space.

Decorating Mistake No. 6: You picked your paint color first.
When it comes to selecting paint colors for your home, there are several vital tips and tricks to follow for a successful outcome. However, the single most critical piece of advice is this: NEVER pick your paint color first! This is a mistake I personally made countless times, leading to endless repainting sessions. Learn from my experience and avoid this common pitfall.
Furthermore, once you do reach the stage of choosing a paint color, always test paint samples directly on your actual walls. Relying solely on small paint chips is insufficient, as their color accuracy can be misleading, and they won’t reflect how the paint truly looks in your home’s unique lighting conditions.
Instead of impulsively choosing a paint color as your initial design step, I advocate for first identifying what I refer to as your “crucial element.” Simply put, discover that *one thing* that truly excites you and use it as the foundational inspiration for the entire room. This “crucial element” could be a captivating area rug, a significant piece of artwork, a beloved antique furniture piece, or even a distinctive throw pillow. It’s the design anchor from which all other choices will flow.
It is significantly easier and more effective to select a complementary paint color based on an existing “crucial element” than it is to scour for decor pieces that try to match a paint color you’ve already applied to your walls. Trust me on this. Unless your goal is an entirely neutral room, an ideal “crucial piece” will often feature a pattern and incorporate multiple colors. This variety will provide you with a rich palette of hues from which to draw inspiration for your perfect wall color, ensuring a cohesive and thoughtfully designed space.
For Thea’s kitchen, the design journey began with her runner. This vibrant piece served as the ideal “crucial element,” providing a fantastic starting point that informed every subsequent decision, from her wall color and the cabinet colors to the fixtures, backsplash, and decorative accents. The result was a beautifully coordinated and inviting kitchen.

Similarly, in Attley’s room, her enchanting fox mural became the central “crucial element.” Once this decision was made, the entire room’s design unfolded effortlessly: paint colors, furniture selections, and charming decorative touches like the pom-pom garland and decorative pillows (you can find all the sources for Attley’s room here). Every element feels harmonious and intentional because the design process started with a strong, inspiring focal point: the fox mural.
Decorating Mistake No. 7: Your curtains are hung poorly (making your windows look smaller than they are).
Improper curtain installation is a surprisingly common interior design mistake that can dramatically shrink the perceived size of your windows and, consequently, your entire room. The golden rule for curtain hanging is to position them *higher* and *wider* than your actual window frame whenever possible. This technique is particularly effective when you’re aiming to make a small room appear larger, as it creates an illusion of greater window height and width.
Instead of attaching your curtain rod directly at the top and outer edges of your window frame, you want to mount it significantly higher—ideally, closer to the ceiling or at least 4-6 inches above the window frame. Additionally, ensure your curtain rod extends well beyond the width of your window, allowing the curtains to frame the window when open, covering only portions of the wall rather than encroaching on the glass. This subtle yet powerful “trick” maximizes natural light and makes your windows appear much more expansive than their actual dimensions. Observe the striking difference in the before-and-after photos of our dining room below to fully appreciate the impact of proper curtain placement.
The “before” photo below clearly illustrates the original size and placement of the window.

Now, observe the “after” photo: notice how the curtains are hung significantly higher than the window frame. Also, note how they extend well beyond the window’s actual width, covering portions of the wall. Both of these strategic installations contribute to the illusion, making the windows appear much grander and the room feel more spacious and elegantly finished.

Decorating Mistake No. 8: The patterns in your décor and fabrics are too similar.
Have you ever admired those impeccably designed rooms featured in magazines or on television, wondering how they achieve such a sophisticated and layered look? A key secret lies in the artful mixing of patterns and textures. When executed skillfully, this technique elevates a room from ordinary to high-end designer status, adding depth, visual interest, and a sense of curated elegance.
A significant design mistake is to choose patterns for upholstery fabrics, rugs, curtains, throw pillows, and other decor items that are too similar in style, scale, or intensity. While these patterns should ideally share a cohesive color palette to maintain harmony, they must vary in other aspects. For instance, balance busy patterns like intricate florals or classic toile with simpler, more grounding patterns such as stripes or subtle geometrics. Alternatively, try combining organic, unstructured patterns like ikat with bold, graphic geometric designs. The contrast creates dynamic tension and visual intrigue.
Beyond style, varying the *size* of your patterns is equally crucial. A well-designed room typically incorporates a mix of large, medium, and small-scale patterns. Begin with a large-scale pattern—this could be anything from oversized floral motifs to broad, impactful stripes—which will anchor the room. When introducing a second pattern, aim for one that is roughly half the size of your primary pattern. A third pattern should be even smaller and serve as an accent, perhaps on a throw pillow or a small decorative object, tying the larger patterns together without overwhelming the space. This strategic layering of patterns adds a professional, polished feel that is characteristic of truly exceptional interior design.
You will also enjoy these posts with similar content:
- 16 Gallery Wall Ideas (and Tips) To Inspire You
- How to Make a Small Room Look Bigger
- How to Choose Paint Colors for Your Home: 6 Simple Tips to Follow
- The Best Paint for Kitchen Cabinets: 10 Successful Cabinet Transformations
- Sherwin-Williams Alabaster Color Review With Pictures
- How to Choose An Area Rug: Rug Placement & Size Guide
- How to Decorate With Color Even When It Scares You
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