Beautifully personal. Effortlessly guided.

GSID specializes in residential interior design, including new construction, whole-home renovations, kitchen and bathroom design, custom cabinetry, and furnishing projects.

Whether you’re building a home from the ground up or reimagining an existing space, our approach is tailored to your needs, lifestyle, and the scope of your project.

As early as possible! Ideally, before architectural plans are finalized or construction begins.

Early involvement allows us to consider how your home will function, refine layouts, anticipate technical challenges, and coordinate materials and design decisions before they affect construction.

The earlier we collaborate, the more opportunities we have to make thoughtful decisions and avoid unnecessary changes later.

Absolutely. Collaboration is an essential part of our work.

With eight years of previous experience as a General Contractor, Geraldine brings a practical understanding of construction to the design process.

We work alongside architects, builders, cabinetmakers, and trades to ensure that design decisions are clearly communicated and thoughtfully executed.

Our philosophy is simple: no problems, only solutions.

Yes. Construction oversight and owner representation are important parts of our services.

We help coordinate design decisions, review details, communicate with contractors and trades, and address design-related questions as construction progresses.

Our role is to protect the design vision while helping clients navigate the many decisions involved in bringing their home to life.

We complement the work of your General Contractor rather than replace their construction management responsibilities.

Not at all.

You don’t need to arrive with a perfectly defined aesthetic or a Pinterest board full of ideas.

Our process begins with understanding how you live, what you love, and how you want your home to feel.

Rather than imposing a signature look, we develop a design that reflects your personality, your architecture, and your lifestyle.

The goal isn’t to create a GSID home. It’s to create your home.

That’s something we establish together.

Some clients enjoy participating in every design decision, while others prefer to delegate most of the process.

We provide clear recommendations, organized presentations, and guidance at key decision points so you can remain involved without feeling overwhelmed.

Our goal is to make the experience enjoyable while respecting your time.

Yes.

We help clients select furniture, lighting, rugs, window treatments, and accessories to create interiors that feel cohesive, comfortable, and personal.

These services can be part of a larger renovation or a furnishing-focused project.

From major furniture pieces to the finishing touches, every element contributes to making a house feel like home.

Every project is unique, and so is our approach to pricing.

GSID typically works with a flat fee for the initial concept design, followed by hourly rates for design development, sourcing, and design implementation.

For smaller projects or clients looking for focused guidance, we also offer a flat-fee design consultation.

Because every home, scope, and level of involvement is different, we tailor our proposals to your specific needs.

Let’s talk about your project and find the approach that works best for you.

GSID is based in Mill Valley, California, and serves homeowners throughout Marin County, San Francisco, the Peninsula, Sonoma County, and surrounding Bay Area communities.

Projects include new construction, residential renovations, and interior furnishing services.

It all begins with a conversation.

Tell us a little about your home, your ideas, and what you’re hoping to achieve.

We’ll discuss your project, understand your priorities, and explore how GSID can best support you.