Example of a 1960s living room design in Seattle

A master bath renovation that involved a complete re-working of the space. A custom vanity with built-in medicine cabinets and gorgeous finish materials completes the look.

Kitchen Organization Station Photography: Kevin Guzman
Large trendy built-in desk light wood floor and beige floor home office photo in San Francisco with gray walls

Nestled in the lush landscape, a modern reinterpretation of a once-fallen barn now features a charming guest cottage with stylish details and contemporary amenities. Situated along a narrow lot in Germantown, New York, the cottage completes a cluster of existing buildings, forming an intimate courtyard on one side. Steel effect folding patio doors fully open the living areas to the expansive fields and the Catskill Mountains beyond. The homeowners, a young family with parents living abroad, envisioned a cozy yet modern ADU for extended stays. Designed by Lauren Cawse, AIA, architect and partner at The Art of Building, the year-round retreat draws inspiration from traditional local barns while embracing a seamless indoor-outdoor connection. Captivating Guest Cottage Design Enhances the Senses with Steel Effect Folding Patio Doors The modern ADU design started with the site itself. Positioned between residential and commercial neighbors, the elongated property required a careful balance of privacy and openness. Architect Lauren Cawse approached the layout by redefining the existing house and garage as the east and west sides of an outdoor room, with the new cottage forming its southern boundary. This arrangement created a clear courtyard near the main residence while directing the 800-square-foot guest house toward the open meadow and the distant Catskill Mountains. “The unique character of the site and its history inspired the architectural direction,” says Cawse. “The intent was to create a secondary structure in the compound in clear contrast to the modern farmhouse style of the house and garage.” A Barn-Inspired Exterior Adds Visual Flair The exterior envelope evokes a traditional barn with a simple gable shape, weathered wood siding, cedar shingles, and a foundation veneer made of local fieldstone. A large sliding barn door adds a complementary feature to the courtyard-facing side, creating a dynamic opening that maintains uninterrupted views through the cottage to the meadow beyond. Steel effect folding patio doors surrounding the structure add a modern touch of transparency, and simulated divided lites allow the contemporary glass wall systems to harmonize with the traditional elements of the modern ADU design. “The goal was to fully open the living areas to the outdoors, framing views to the meadows and mountains,” says Cawse. “The positioning of the NanaWall systems frames the views and, when open, dissolves the boundary between inside and out.” Interior Design That Mirrors Nature’s Tranquility Inside, the design program features a simple layout with one bedroom, a full bath, a kitchenette, and a living area with a wood-burning stove. The interior, a collaboration between The Art of Building and the homeowners, is defined by an understated palette and tactile materials that reflect the natural setting. Color is introduced through the framed glass views on all sides of the structure. Reclaimed timber collar ties span the ceiling overhead, while stone surfaces and naturally patinated metal accents add quiet texture throughout. Custom hand-painted Delft tiles along the kitchen backsplash add personal detail, and terra cotta flooring in the bathroom brings warmth and old-world charm. Soaring ceilings and abundant daylight create a peaceful play of light and shadow, shifting subtly with the seasons and emphasizing the cottage’s connection to the natural landscape outside. Sleek Steel Effect Folding Patio Doors Elevate the Modern ADU Design Aesthetic Three customized steel effect folding patio doors define the living space, each aligned to respond to a different edge of the site. The largest, spanning nearly 20 feet wide and just under eight feet tall, opens directly onto the stone patio, allowing the main gathering area to extend fully into the landscape. Along the side of the living room, a smaller 10-foot-wide system introduces more light and ventilation, nearly creating an open corner condition if not for the structural post that supports the façade and roofline. At the rear, a fourth ten-foot-wide system features a French door swing panel configuration that opens toward the courtyard, strengthening the design connection to the main residence. All steel effect folding patio doors were specified with a low-maintenance, water-rated Performance Sill to safeguard against inclement weather while providing a seamless, barrier-free transition to the outdoor patio. Unique Customizations for Visual Appeal and a Steel Effect Each folding patio door system is configured to open outward, maximizing usable floor space in the compact interior and allowing furniture placement to remain uninterrupted. By stacking outward, the steel effect folding patio doors, specified in a SE Classic Bronze powder coat, ensure every inch of the cottage is optimized. Simulated divided lites create a consistent rhythm across windows and doors, maintaining alignment with the traditional barn-inspired exterior. In the bedroom, a three-panel, 10-foot-wide system mirrors these customizations, matching the steel effect divided-lite pattern and outward-opening configuration, extending the indoor-outdoor connection while preserving visual continuity throughout the ADU. “The divided lites were crucial to the architectural vision, and while budget prohibited a steel and glass system, NanaWall Systems’ thin frames provide the open and airy feeling we hoped to attain,” says Cawse. “Simulated divided lites transition the thoroughly modern element of the glass walls to remain in harmony with the otherwise traditional palette.” Matching Windows and Doors: Create a Cohesive Design Program Alongside the larger openings in the living areas and bedroom, a smaller 3-foot-tall NanaWall tilt turn window was added to the bathroom. This window-sized NanaWall system perfectly matches the divided lite panels and sleek frames of the steel effect folding patio doors, creating a cohesive modern ADU design throughout. The compact opening provides ventilation and natural light, enhancing the spa-like atmosphere along with natural stone flooring. The matching glass lines and sleek profiles of the NanaWall Generation 4 comprehensive product line further unify visual consistency, allowing each system to fit into the architectural style seamlessly. “This project had three bifold glass walls, a pair of double French doors with sidelites, and a single tilt turn window,” says architect Lauren Cawse. “Being able to work with a single manufacturer provided aesthetic cohesiveness and simplified coordination.” Sustainability Where It Matters Most New York weather can vary from hot 85-degree summers to cold 26-degree winters. Creating an efficient living space was a primary goal. To achieve this, the design included Timber HP-insulated walls and floors with a heat pump system for effective heating and cooling. Additionally, the steel effect folding patio doors and windows were specified with double-glazed panels to ensure a tight building envelope. Indoor-Outdoor Living Spaces for Relaxing and Entertaining In-house landscape designer Liz Pulver worked closely with the team to conceive open-air spaces that enhanced the connection between inside and outside. To the south end of the lot, the landscape transitions into an “enhanced meadow,” allowing the cottage to feel embedded within the surrounding fields rather than set apart from them. A circular pool was designed to mimic a natural pond with a modest footprint. Around it, a minimalist fence and sunken stone ha-ha wall offer discreet safety for young children. Limited space due to existing infrastructure and zoning setbacks left only a small footprint for the swimming pool, prompting the designer to propose a circular form that maximized the usable swimming area. “We felt that the perfect way to integrate a pool into the property and to honor the landscape would be to treat the pool as a piece of art itself,” says Pulver. “The result is a beautiful round pool that serves as both a functional retreat and a sculptural moment.” Final Thoughts: A Barn-Inspired Design for Contemporary Living This modern ADU design skillfully combines modern features with the enduring charm of traditional barns. The outcome is a welcoming living space that stands out amid a stunning landscape. Natural materials that mimic the beauty of the outdoors, expansive steel effect folding patio doors that fill the space with fresh air and natural light, and a restrained interior design work together to create an inviting retreat for everyday living, throughout the seasons. “When entering the site, the cottage feels as though it was always there,” says Cawse. “It achieves its two opposing goals by creating a feeling of intimacy and enclosure near the house while also functioning as a threshold to the expansive fields and views beyond.” Explore how NanaWall folding patio doors elevate other ADU spaces in our inspiring project photo gallery! Frequently Asked Questions (FAQs) What is Slimline Steel Effect? Steel Effect is a folding patio door design option that replicates the appearance of traditional steel-framed glass doors. It combines the look of steel with the performance benefits of aluminum, including energy efficiency, low maintenance, greater design flexibility, and lower cost. How does a NanaWall Steel Effect aluminum system compare to traditional steel-framed glass doors? NanaWall Slimline Steel Effect folding patio doors replicate the narrow frames of traditional steel doors with improved weather and thermal performance and easier operation. They are lighter, more corrosion-resistant, and feature a thermally broken design for better energy efficiency and lower long-term maintenance. What are the benefits of Steel Effect folding glass walls? Steel Effect folding glass walls deliver the narrow sightlines and grid patterns of traditional steel, combined with the performance and low maintenance of aluminum. The slimline steel effect option offers all the benefits of our Generation 4 product line, including the FourFold / SixFold floating panel set option and smooth operation with Gothic arch stainless steel rollers on a stainless steel track. Can Slimline Steel Effect glass walls be customized? Yes, these systems offer a high level of customization to suit different architectural styles, including simulated divided lites specified in various patterns, popular SE colors for a true steel effect look, and a contemporary glass stop option for a refined look. Contact your local NanaWall representative for additional options here. How energy-efficient and weather-resistant are Slimline Steel Effect folding patio doors? Steel effect folding systems are engineered for strong thermal and weather performance. Thermally broken frames and high-performance glazing help improve energy efficiency. Each NanaWall system has been independently tested for air, water, structural integrity, and forced entry with excellent results.

A bright and airy all-white bathroom.
Example of a large arts and crafts master white tile and ceramic tile ceramic tile and white floor bathroom design in Seattle with white cabinets, white countertops, a two-piece toilet, gray walls, an undermount sink and recessed-panel cabinets

Kitchen and dining in a Naples FL home featuring wicker chairs, exposed wood beams, open shelves, a plaster hood, and casual seating in the dining space and kitchen. Project featured in House Beautiful & Florida Design. Interior Design & Styling by Summer Thornton. Images by Brantley Photography. Brantley Photography

Designed by Risa Boyer and built by Hammer & Hand, this comprehensive external and internal remodel updated the home with an open layout featuring clean, modern stylings throughout and custom cabinetry by Ben Klebba of Phloem Studio. The team transformed a dark side room into a luminous sunroom overlooking Oswego Lake, designed to highlight a large stained glass window created by the homeowner’s family. A new enclosed garden breezeway connects the house to the freestanding garage, where H&H added a creative work space.

This unique city-home is designed with a center entry, flanked by formal living and dining rooms on either side. An expansive gourmet kitchen / great room spans the rear of the main floor, opening onto a terraced outdoor space comprised of more than 700SF. The home also boasts an open, four-story staircase flooded with natural, southern light, as well as a lower level family room, four bedrooms (including two en-suite) on the second floor, and an additional two bedrooms and study on the third floor. A spacious, 500SF roof deck is accessible from the top of the staircase, providing additional outdoor space for play and entertainment. Due to the location and shape of the site, there is a 2-car, heated garage under the house, providing direct entry from the garage into the lower level mudroom. Two additional off-street parking spots are also provided in the covered driveway leading to the garage. Designed with family living in mind, the home has also been designed for entertaining and to embrace life's creature comforts. Pre-wired with HD Video, Audio and comprehensive low-voltage services, the home is able to accommodate and distribute any low voltage services requested by the homeowner. This home was pre-sold during construction. Steve Hall, Hedrich Blessing

Large trendy entryway photo in Boston

In 2026, DIY home design and renovation will become easier than ever. Free mobile apps like Houzz, Homestyler, and Planner 5D will put professional tools in everyone’s pocket, letting users visualize layouts, test colors, and estimate costs before buying materials. Experts predict that over 50% of homeowners will use apps to plan upgrades. It will save money and reduce costly mistakes. Even now, about 54% prefer mobile tools. Why Mobile Apps are Changing Home Renovation DIY renovation has changed a lot in recent years. Homeowners don’t have to rely on sketches or guesswork anymore. Thanks to AR, AI, and 3D renderings, apps can show exactly how furniture and cabinets will fit. By 2026, many of these tools will be free - and packed with features that rival expensive software. With just a smartphone, anyone can try out layouts, test colors, and even create detailed floor plans. The Tech Behind Modern Design Apps Most renovation apps now leverage AI to generate design suggestions. They are based on your space and preferences. Upload a photo of your room. The algorithms will check the sizes, lighting, and features. Then, they’ll suggest furniture layouts or color schemes. Some apps use your phone’s camera and sensor. They make accurate measurements, so you won’t need tape measures or notepads. Top Free Apps Transforming DIY Projects Houzz continues to lead the pack with its massive photo library and ability to connect users with local contractors. The platform now gives AI design suggestions. It looks at your style preferences across millions of professional spaces. For anyone serious about planning their next project, exploring comprehensive resources helps narrow down what works. It’s just like in iGaming, where review platforms like Slotzilla help gamblers to find casinos with user-friendly tools, bonus rounds, and progressive jackpots that will work for them. Planner 5D shines with realistic 3D renderings and a huge furniture catalog, letting you switch between 2D plans and 3D walkthroughs - even in VR. Room Planner helps you design practical layouts. You can easily arrange furniture and check dimensions. It offers real-time 3D views and features items from real brands. Apps for Specific Renovation Tasks Not every project needs full 3D renderings - sometimes you just want to try paint colors or test tile patterns. ColorSnap by Sherwin-Williams uses AR to show colors on your actual walls and even matches shades from photos. Magicplan makes creating floor plans easy by measuring rooms with your phone as you walk around. Both apps help plan renovations and communicate ideas without the guesswork. Budget Tracking and Project Management Renovation apps do more than make spaces look good - managing budgets and timelines is just as important. HomeZada even uses AI to predict your budget and track material prices, so DIYers don’t get hit with surprise costs. Trello is a lifesaver - set deadlines, track progress, and share updates with anyone helping on the project. How Apps Reflect 2026 Design Trends This year’s popular apps reflect the largest home design trends. Colorful rooms are on the rise. Zillow shows a 149% increase in listings. Plus, apps like Houzz let users test bold shades before making a choice. Cozy reading nooks are also on the rise, showing up in nearly half of listings. Renovation apps now provide templates. They include tips for shelves and lighting. This helps create cozy, thoughtful spaces. Here’s a quick comparison of what different free apps offer: App name Best feature Learning curve Platform Houzz 25M+ inspiration photos Easy iOS, Android Planner 5D Photorealistic 3D renders Moderate iOS, Android, Web Room Planner Accurate measurements Easy iOS, Android Magicplan Auto floor plan creation Easy iOS, Android Natural materials and earthy tones will lead design trends in 2026. Warm neutrals will take over from the grey-and-white minimalism of the last ten years. The AI Revolution in Home Design AI is no longer just a gimmick in renovation apps. Chat features can suggest furniture layouts, color palettes, and materials for your budget. It’s like having a designer on call. Renovate AI turns photos of your room into multiple style ideas in seconds, from mid-century to rustic farmhouse. It’s great for brainstorming and getting past the “I don’t know what I want” stage. Practical Tips for Using Renovation Apps Getting the most from design apps requires a strategic approach. Here are essential steps every DIYer should follow: Start by gathering inspiration. Look through photo libraries on Houzz or Pinterest. Then, dive into detailed planning. Don’t rely solely on screen colors; get actual paint chips and fabric swatches. Save multiple design versions. Create variations of your plan to compare options side-by-side. This workflow helps you avoid common mistakes. It leads to better design choices before you buy anything. When Apps Aren’t Enough Digital tools can’t do everything. Big structural changes, electrical work, or plumbing always need a pro. Apps are great for planning and talking with contractors, but they can’t replace expertise. And always check textures in real life - that sofa might look perfect on screen, but feel different. The Future of DIY Renovation In 2026, renovation apps will become smarter. They’ll have voice control and better AR. Improved AI will make DIY design feel more like professional services. Creating beautiful, functional spaces is easier than ever. For homeowners, it’s important to use apps that match local materials and building codes. The biggest benefit is confidence - seeing your design in 3D makes projects far less intimidating.