Let’s transform your space!

Heidi Semler Interior Design is a full service luxury interior design studio based in Portland, Oregon, specializing in high end residential interiors for traditional and transitional homes. Established in 1997, our boutique firm is known for creating refined, timeless spaces that balance classic design with modern livability.

We provide custom interior design solutions tailored to each client, offering a comprehensive approach that includes new construction, full home renovations, remodels, and elevated interior refreshes. Our work is rooted in thoughtful details, curated materials, and a deep understanding of how to create homes that feel both sophisticated and lived in.

Serving Portland and the surrounding Pacific Northwest, we collaborate closely with homeowners to design interiors that reflect their lifestyle while maintaining a sense of enduring style and comfort.

Design a home that feels intentional, elevated, and entirely your own.

Let us help you!

Your Portland Home, Beautifully Designed

Recent Projects

Our Services

  • INTERIOR DESIGN

    Focused on the functional and structural elements of a space, interior design addresses layouts, floor plans, lighting, built-ins, and finishes. It ensures your home not only looks beautiful but also works seamlessly for your lifestyle.

  • INTERIOR DECORATING

    Decorating brings the personality and polish—furniture, textiles, color palettes, art, and accessories that layer warmth and style into your home. It’s about creating an inviting atmosphere that reflects your taste.

  • FULL SERVICE

    Our full-service offering combines design and decorating for a complete, turnkey experience. We guide the project from start to finish—coordinating with contractors, managing timelines, overseeing purchases, and pulling every detail together so your home feels polished and cohesive.

Inside the Studio

Step inside HSID and see where the creativity happens. Our studio tour video gives you a behind-the-scenes look at how we bring ideas to life and design homes that feel uniquely yours.

See the latest on Instagram @heidisemlerinteriordesign

✨ Meet Heidi – Owner & Principal Designer of HSID ✨ Established in 1997, HSID is a boutique interior design firm in Portland, OR with big ideas and a passion for creating warm, beautiful, and custom spaces. From new homes to remodels, Heidi
Bright, timeless, and functional 🤍✨ This white kitchen design balances classic shaker cabinets, warm wood floors, and polished finishes for a space that feels both elevated and inviting. The perfect blend of style + function for everyday living. #K
Creating layers through texture, color, and accessories. Fresh flowers, curated books, and timeless accents make this space shine. A perfect balance of classic and modern interior design. ✨ #InteriorStylingIdeas #TimelessHome #DecorDetails #Interior
A quiet corner that flows right into a light-filled bath ✨🌸 Soft textures, fresh blooms, and natural light make this space feel calm, welcoming, and oh-so-inviting. Proof that the little details bring the biggest comfort 📸 @audiss_authentic #Coz
A little peek behind the sliding door 👀✨ This pantry is proof that utility spaces can be just as beautiful as the rest of the home. Clean lines, smart storage, and a touch of natural light = pantry perfection. 📸 @audiss_authentic #PantryGoals #

What Our Clients are Saying

  • "Heidi sees her client and their tastes and designs for them while keeping with her signature style. She also did a great job being in relation with our contractor and making sure things are continually moving forward! Having her being a part of this project made me less overwhelmed as a whole."

    Jill, Portland, OR

  • “Heidi and her team bring good juju and calmness to our project”

    Katy & Bob, Lake Oswego, OR

  • “Working with Heidi and her team is to see professionalism at work at every step. Heidi unquestionably has an excellent eye for design and her selections are novel and contemporary, yet still traditional and classic to carry your home through many years and all seasons. More than the design prowess, though, it is her attention to detail with clear schedules and billing that make her firm a pleasure to work with. Their communication is prompt and direct; commitments are met; installation is overseen with a keen a discerning eye. We have used Heidi’s team for several projects, both exterior and interiors and – consistently – the projects have been completed beautifully, on time, and within the budget expectations. We recently had a project with a very short time window to meet a family party deadline and Heidi and her team quickly sourced available items so the furniture would be ready before the event. She met all the tight deadlines and designed a lovely outdoor space to entertain. The best recommendation I can give Heidi and her team is that we will exclusively and continually use them on all design projects.”

    Melissa, Portland, OR

  • “I could not be happier with my experience working with Heidi. We were searching for an interior designer with European sensibilities and Heidi proceeded her reputation. She honored our home’s architectural features and Old world style while giving the spaces a design that was also fresh and suitable for a young family. Her recommendations were perfectly in line with our goals and budget. Her design was delivered beautifully and thoughtfully. Heidi has an uncommon combination of experience, ingenuity, talent and humility. We are so excited to have Heidi on board with us for the long haul while she helps us create our dream home. We are thrilled to have her as our designer.”

    Kate on Consultations, Portland, OR

  • “We are finally remodeling our master bathroom, and we reached out to Heidi for a consultation to get us headed in the right direction. She exceeded our expectations for the two-hour consultation. Heidi is very pleasant and easy going, as well as very creative and talented. After many sketches and drawings of possible solutions to our tricky bathroom layout, Heidi came up with a brilliant idea for our space. She left us with the drawings, important details, and many resources and ideas to explore. Thank you, Heidi!”

    Kim on Consultations, Portland, OR

  • “We have been working with Heidi for fifteen years. She is a knowledgeable professional who is timely and reliable. The most important thing to know about Heidi is that she is a great listener. It’s about what you want, your vision, and what’s important to you - her guidance and taste is always on the mark. Heidi is consistently upbeat and positive and makes projects fun and exciting. We have been thrilled with everything she has done for us and our beautiful home. She is a true gem!”

    Bruce & Monica, Salt Lake City, UT

  • “I love working with Heidi and knew the moment she arrived at my house I had chosen the right person. I was familiar with her style and knew it was similar to mine. She did a complete walk through of our house, writing notes, taking pictures etc. Shortly afterwards she sent a list of her ideas and suggestions. She has a great vision, an eye for style, and knows what she is doing. We are slowly working down the list with her wonderful eye for color and patterns. My home is more beautiful than ever, and yet it feels like my style … you will not be disappointed if you work with Heidi!”

    Liz & Tom, Portland, OR

  • “We appreciate Heidi’s ability to listen to our needs. She guided us to create a beautiful, timeless style in our home. She is also excellent at helping us figure out where to put our money to have the most impact. Her work on our home with everything from a remodel to adding a few furniture pieces has always been punctuated by her positive energy and enthusiasm. We love the results and the experience of working with her!”

    Steve & Mari, Portland, OR