Interior Design · Port Washington, New York

Courtney Sempliner Designs

Courtney is a native New Yorker with over 15 years experience working on projects of all scales across the globe.

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bio

A native New Yorker, with a lifetime of design behind her.

Courtney is a native New Yorker with over 15 years experience working on projects of all scales across the globe.  She comes from a long line of designers, artists and architects, bringing extensive experience and knowledge to all her projects.

Prior to opening her eponymous business in 2016, Courtney gained invaluable years of experience at international design firms in New York and London; including a variety of high profile, luxury residential projects such as a private penthouse residence within the Plaza Hotel, properties within the renowned One Hyde Park building in London, as well as various property developments and private residences all over the world for a roster of high profile clients. Current projects include private family homes and office projects in the New York area, on the West Coast and everywhere in between.

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Services

A comprehensive menu of à la carte design services

01

Planning

  • Client Consultation
  • Preliminary Budget
  • Scope of Works
  • Space Planning
  • Review of Existing Plans

02

Design

  • Mood Boards
  • Furniture Layouts & Elevations
  • Finish, Fixtures & Material Research
  • Kitchen & Bath Design
  • Architectural Finishes

03

Project Management

  • Budget Planning
  • Coordination with Builders/Contractors
  • Assist with Bidding Process
  • Procurement & Purchasing
  • Organization of Deliveries
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“Our apartment looks beautiful and Courtney's style, organization, attention to detail and professionalism receives full marks!”

— Laila, NYC Pied A Terre
More client testimonials → 
As featured in

HC&G · NYC&G · The Wall Street Journal · Traditional Home · HGTV · Domino · Newsday · MyDomaine · Better Homes & Gardens · Cottages & Gardens · Business of Home · Apartment Therapy

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Instagram

@courtneysemplinerdesigns

Today is Make Life Beautiful Day. ✨ But at CSD, beauty was never just about what a room looks like. It’s about how it makes you feel the moment you walk in. The catch of something unexpected. The detail that shouldn’t matter — but d
Every beautiful life deserves a beautiful place to live. 🙌🏻 A custom closet isn’t just storage — it’s a sanctuary. Curated shelving, a statement island, and every detail considered so your mornings feel as effortless as your sty
Nourish. Don’t just decorate. 🫶🏻 At CSD, every decision — every texture, every detail, every thoughtfully designed space — is rooted in one belief: your home should take care of you. Not the other way around. Because the most b
Comfort isn’t just how something feels — it’s how a space makes you feel. ✨ Every layer in this living room was chosen with intention, from the sink-into-it softness of the cushions to the cool, sculptural weight of the stone. When
Did you know May 20th was National Weights & Measures Day? ✨ We took it seriously. Because here’s the thing — if your space already works for you, if you love the height of your vanity, the way your sofa fits just right, the exact a

We would love to hear from you!

If you have an upcoming project, we would love to hear about it and see how we can help.

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