What Does It Cost to Hire an Interior Designer? How KJI's Pricing Works for Every Size Project

As an interior designer, I know all too well that there is one nagging question that can keep someone from picking up the phone and calling our offices because they are genuinely afraid of what the answer will be: How much does it cost?

It’s not that they don’t want help in designing a space, it’s not that they don’t need help designing a space. It’s all wrapped up in the industry-wide reputation that interior design has garnered over the years of being a ‘big ticket’ industry.

I understand where that comes from, but it is also not reflective of the industry as a whole, and it is definitely not how we operate at KJI.

So, I thought we could demystify how interior design pricing works and what you can expect when considering working with a designer.

First, Let’s Cover How Interior Designer Pricing Works in General

There is no single universal pricing model in interior design. Different designers charge differently. If you’re looking for a designer, you could see any of the following pricing models.

Hourly rate only: You pay for the designer's time, billed by the hour. This can work really well for small or loosely scoped projects but can feel concerning and unpredictable if the scope shifts.

Flat design fee: A set fee for the design work itself, agreed upon upfront based on project scope. This is for sure more predictable for the client, especially on well-defined projects.

Percentage of project cost: Here, the designer charges a percentage of total spend on furnishings, materials, and construction. This is more common on large renovation and new construction projects.

Flat fee plus hourly: A base design fee covers the core scope of work, with additional hours billed at an agreed rate if the project expands. This is the model we use at KJI, and we like it because it gives clients a clear starting point without leaving either side exposed if the project grows.

At Kaki John Interiors, our structure starts with a flat designer fee, with additional work billed at our hourly rate. That means when you come to us, you are not staring at an open-ended number. You know what the base engagement looks like, and we talk through what "additional" would mean for your specific project before anything is agreed to.

What Affects the Cost of an Interior Design Project

No two design projects are the same, and so cost is going to be impacted by that. It’s simply adjusted based on a few key measures: scope, complexity, materials, and yes – your timeline too!

Scope. One room costs less than three rooms. A half-bath costs less than a primary suite. Full-home design is a different engagement entirely from a single-space refresh.

Complexity. A room that needs new furniture and accessories is different from one that involves structural changes, custom millwork, or a full kitchen renovation with contractor coordination.

Furnishings and materials. The design fee pays for our time and expertise. Furnishings, tile, fixtures, hardware, and finishes are separate costs. We can work across a wide range of budgets and finding the right piece at the right price point is genuinely one of our favorite parts of the job.

Timeline. Rush projects require more concentrated time and sometimes more vendor coordination. If you have a flexible timeline, that gives us more room to source thoughtfully and cost-effectively.

What a Smaller Project Could Look Like

Here is something we want y'all to know clearly: you do not need to be renovating your whole house to work with us.

We take on single-room projects regularly. We’ve tackled home offices, guest bedrooms, primary suites, and yes, half-baths! If you ask us, a powder room is small in square footage and big in impression and it’s often the one room in a home where you can be a little bold, a little unexpected, and where guests will stop mid-step and notice the design. So fun!

For a smaller project, the scope is pretty defined. And the result is a finished space you are genuinely proud of, not a room you keep meaning to get to.

We take on a half-bath or single-room project with the same care and intention that we bring to a full home. The scale is different, but the commitment is the same.

The Real Cost of Not Hiring a Designer

When you make renovation and furnishing decisions alone, under time pressure, without a trained eye on the full picture, the risk of buying something that does not work is a lot higher, y’all. You’ve heard the stories, right? Where your sister ordered that sofa that looked right online but was way too small for the room. Or how about your neighbor who picked out tile that seemed neutral in the store but read completely different under their lighting. Are you looking at the paint color you chose in a hurry before moving in that you have been quietly unhappy with for two years? Listen, you’re not alone.

Working with a designer doesn’t remove all risk (if only), but we do significantly reduce the chance that you spend money on something you have to live with and quietly resent.

That is part of what you are paying for: someone whose job is to see the whole picture, think about how decisions interact with each other, and help you spend your money on things you will love.

If you’re curious – get in touch. We don’t bite, I promise.

• How much does an interior designer cost for one room?

  It depends on the scope and complexity of the room, but a single-room engagement is generally far more accessible than people assume. At KJI, our structure starts with a flat design fee plus an hourly rate for additional work, so you have a clear baseline before anything begins. Reach out and we can talk through what your specific space would look like.

• Is it worth hiring an interior designer for a small project?

  For a lot of people, yes. A well-designed single room, a half-bath, or a home office can genuinely change how you feel about your home every day. And smaller projects are often where clients start before coming back for something larger.

• Do interior designers charge for the first consultation?

  It varies by designer. At KJI, we offer an initial conversation where we can get a sense of your project and whether we are a good fit before any fees are discussed.

• What is a flat design fee?

  A flat design fee is a set amount agreed upon upfront for the design work on a defined project scope. Rather than billing purely by the hour, a flat fee gives the client a predictable baseline investment. At KJI, we combine this with an hourly rate for any work beyond the original scope.

• Can I hire an interior designer just for advice, without a full project?

  Yes. Depending on what you need, a design consultation or single-session advisory can be a great fit for clients who want professional input without committing to a full engagement. Ask us about this when you reach out.

• How do I know if my project fits my budget?

  The honest answer is: have the conversation. Budget alignment is something we discuss early and directly. We would rather tell you upfront what is realistic than start a project that is not set up to succeed.

Kaki John is the owner and senior designer of Kaki John Interiors, an Austin-based interior design studio serving clients nationwide. She holds an Interior Design degree from the New York Institute of Art and Design and has been transforming homes since 2012, working across full-home renovations, new construction, and single-room redesigns. Her work has been featured in Voyage Austin.