The short answer
An interior designer in the Houston area charges about $41 to $370 an hour, depending on experience. Most projects come to about $1,550 to $9,150 for design work and furnishings together. Texas lets anyone practice interior design and protects only the title "registered interior designer." If the plan removes a load-bearing wall, the City may want an engineer's seal, so decide early who will draw that part.
What interior designers cost in Houston
These ranges take national cost data and apply the U.S. Army Corps of Engineers' construction cost factor for Texas, 0.82. They cover the designer's fees only. Furniture, fabric, lighting and the contractor's work are extra.
| Job | Houston (typical range) | US average |
|---|---|---|
| Interior designer, per hour | $41–$370/hr | $50–$450/hr |
| In-home consultation | $41–$370 | $50–$450 |
| One room, design only | $370–$1,250 | $450–$1,500 |
| One room, design and furnishing | $820–$9,850 | $1,000–$12,000 |
| Whole home, per sq ft | $4–$14/sq ft | $5–$17/sq ft |
| Whole home, 2,000 sq ft | $8,200–$27,900 | $10,000–$34,000 |
Estimates for 2026, including labor and standard parts. Houston prices use the Texas statewide construction cost factor of 0.82 (US average = 1.00) from the U.S. Army Corps of Engineers Area Cost Factors, which have no separate Houston entry. Your quote depends on access, materials and the condition of the home.
HomeGuide's national average for a whole design project is about $5,406, or roughly $4,450 at the Texas cost factor. A firm principal bills near the top of the hourly range, and a junior designer or a solo decorator near the bottom. The Bureau of Labor Statistics counted about 1,050 interior designers employed in the Houston, The Woodlands and Sugar Land metro in May 2023, at a mean wage of $31.98 an hour (BLS). Those are wages paid to employees, which is a different figure from what a firm bills you.
The cost estimator below asks about your rooms and scope and applies the rate for your ZIP code.
How Houston designers bill
Designers here choose from six common fee structures, and many combine two on one job. Here they are with HomeGuide's national figures, converted to Houston prices where the fee is a dollar amount (HomeGuide):
- Hourly: about $41 to $370, or around $125 at the national average rate
- Flat fee per room: about $820 to $9,850, with most firms near $1,250 to $4,000 a room
- Per square foot of the home: about $4 to $14
- Percentage of construction cost: 10% to 30% of the build, 20% on average
- Cost plus: 17% to 45% added to what the designer pays for furniture and trade work, 30% on average
- Markup on retail: 10% to 35% on furnishings at retail price, 22% on average
At the 30% average, cost plus on $20,000 of furniture adds $6,000 to the designer's bill.
Retainers, deposits and add-on fees
Most firms ask for a retainer at signing. HomeGuide puts it at about 10% of the project, usually nonrefundable, though some firms want 10% to 50% up front. Deposits on furniture the firm orders for you often reach 50%. A designer who manages the trades during construction usually adds a management fee of about 25%. Travel is often billed at half the hourly rate, and CAD drawings are often a separate charge. In a metro that runs from Conroe to Pearland, travel time adds up, so ask how it is billed before every meeting becomes a site visit.
Sales tax on furniture
Texas charges a 6.25% state sales tax on most goods, and cities, counties and transit authorities can add up to 2%, for a combined maximum of 8.25% (Texas Comptroller). Houston and Katy both sit at 8.25%: a 1% city tax plus a 1% transit tax for Houston MTA (city rates). On $40,000 of furniture, that is $3,300 in tax. Ask the designer to put design fees and furnishings on separate lines, and to say whether the markup is figured before or after tax.
Texas rules: who may call themselves a registered interior designer
Texas law protects one title. Any person may practice interior design in the state, but only people who voluntarily register with the Texas Board of Architectural Examiners (TBAE) may call themselves a "registered interior designer." TBAE took charge of the title "interior designer" in 1991, and the Legislature changed it to "registered interior designer" in 2009 (HB 1894 bill analysis).
How a designer earns the title
TBAE requires the national CIDQ certificate before a designer can apply (TBAE). Its applicant checklist calls for education, supervised experience under a registered interior designer, passing every part of the NCIDQ exam within 5 years of the first section, and a fingerprint criminal history check before a Texas registration number is issued (TBAE checklist). Registered designers also complete continuing education every year. Texas had 4,135 registered interior designers in 2019, according to the analysis of House Bill 1894.
What changed in 2019
Using the title without registering used to be a Class C misdemeanor. HB 1894, signed in June 2019 and effective September 1, 2019, repealed that criminal penalty and limited TBAE's administrative penalties for interior design work to people who hold a registration. The bill analysis notes that the Sunset Advisory Commission had recommended full deregulation in 2013. TBAE still states that claiming to be a registered interior designer without being one is against the law, and its online search checks any name, city or registration number against lists updated daily (TBAE verification).
Practicing without the title is legal. When a designer does use it, look them up.
Designer, architect or engineer?
Texas law leaves houses mostly open. Section 1051.606 of the Occupations Code says the architecture law does not apply to a person who prepares plans for, or supervises the construction, enlargement or alteration of, a privately owned single-family or two-family home (Occupations Code 1051.606). For other buildings, alterations are exempt unless they involve a substantial structural or exitway change. Nobody without a license may use the word "architect."
That means a designer may draw the new layout for your Houston house, and the City then reviews it. A remodel that changes the floor plan needs plans showing the layout, the materials, the ceiling framing so the reviewer can see which walls carry load, and energy code compliance. Removing a load-bearing wall may require an engineer's seal (Houston Permitting Center). The remodel permit takes 1 to 15 business days of plan review and stays valid for six months.
If your project removes a bearing wall, adds a beam or adds square footage, bring in a structural engineer or an architect. GOLDGCP's Houston architecture guide covers that side, and our structural coordination guide explains where the engineer fits.
Do you need a permit?
Design work itself needs no permit, and neither does much of what designers specify. Houston's Residential Permitting 101 guide exempts painting, wallpapering, tiling, carpeting, cabinets and countertops from building permits, along with drywall repair up to 100 square feet. Beyond that list, permits come in:
| Part of the design | What the City requires |
|---|---|
| Paint, wallpaper, new cabinets, counters, tile or carpet | No building permit |
| New circuits, light fixtures or outlets | Electrical permit, bought by a TDLR-licensed master electrician registered with the City |
| Moved sink, shower or toilet | Plumbing permit from a TSBPE-licensed master plumber registered with the City |
| Walls moved or the floor plan changed | Remodel permit with plans and plan review |
The 2026 fee schedule sets a $33.56 administrative fee, a $91.06 minimum permit and plan review at 25% of the estimated building permit fee (fee schedule).
Historic districts, covenants and the suburbs
Houston has 23 historic districts. The Office of Preservation's exemption list says interior alterations, and rear changes not visible from the street, need no Certificate of Appropriateness (Houston Office of Preservation). A building permit may still apply. In The Woodlands, the covenants require written approval from the village Residential Design Review Committee before anyone builds, alters or repairs a structure or improvement on a lot, so ask Covenant Administration whether your plans fall under that. Katy, Sugar Land, Pearland, Pasadena and Conroe run their own building departments, and the City of Katy lists remodeling and any work that adds or removes walls among jobs needing a permit.
Designing a Houston home that can take water
Hurricane Harvey flooded an estimated 154,170 homes in Harris County in 2017. In a flood-prone home, the finishes you pick decide how much has to come out after the next one. FEMA's Technical Bulletin 2 rates materials for use below the flood level (FEMA TB-2):
| Finish | FEMA rating |
|---|---|
| Built-in cabinets of wood or particle board | Unacceptable |
| Metal cabinets | Acceptable |
| Wallpaper, vinyl, fabric or other wall coverings | Unacceptable |
| Latex or epoxy paint on concrete or block walls | Acceptable |
| Wood doors | Unacceptable |
| Fiberglass doors, or hollow, foam-filled or wood-core metal doors | Acceptable |
| Ceramic or porcelain tile set in mortar | Acceptable |
| Carpet | Unacceptable |
FEMA adds that low-permeability paint on a wood wall can keep the wall from drying. Its flood repair guide says vinyl wallcovering seals the wall the same way and wallpaper paste feeds mold, so wet wallcovering has to come off (FEMA P-234). For homes in flood-prone areas outside the mapped zones, FEMA also suggests raising electrical components and moving appliances higher. Inside the City's regulated floodplain, appliances must sit 2 feet above the 500-year flood elevation and materials below the design flood elevation must resist water damage. Our Houston flooring guide covers floors in detail.
Interior designers in Katy and the newer suburbs
Katy spreads across Fort Bend, Harris and Waller counties. In Fort Bend County the median home was built in 2005, and three in four homes were built in 1990 or later, according to the Census Bureau's American Community Survey. Montgomery County's median is 2004 and Pearland's 2003. If the plan for a house that new is furniture, paint and finishes, Houston's exemption list covers that kind of work, and Katy's permit list names remodeling and wall changes rather than decorating. Your HOA or deed restrictions still govern anything visible outside, and the designer's purchasing terms govern everything you buy through them.
How long design takes in Houston
Your decisions and the scope set the schedule. HomeGuide's architect guide gives a yardstick for jobs that need drawings: first concept drafts arrive 2 weeks to 1 month after the first meeting, and a permit-ready set takes 2 to 6 months (HomeGuide).
| Project | What sets the schedule |
|---|---|
| Furnishing or restyling a room | Your choices, then order and delivery times |
| Kitchen or bath refresh with the same layout | Selections and the trade permits for fixtures and circuits |
| Layout change inside the house | Drawings, then 1 to 15 business days of City plan review |
| Bearing wall, beam or addition | Engineer or architect drawings, then plan review |
Changes made after the drawings are done cost the most time, since they can send the plans back through review.
How to check an interior designer before you hire
- If the designer uses the title "registered interior designer," look the name up in TBAE's search before you sign.
- Look at finished Houston projects of a similar size and budget.
- Get the fee structure in writing, including the retainer, product deposits, any markup and how sales tax appears.
- Ask who will draw anything structural, who pulls permits and which licensed trades handle electrical and plumbing work.
- Make sure the contract states the number of revision rounds.
- If the firm also builds the project, Texas contract rules apply. You get the state's disclosure statement before signing and keep back 10% until 30 days after completion (Property Code ch. 53). On a written homestead contract over $5,000, your payments go into a construction account (Property Code 162.006).
For milestone payment practices, see how payment protection works.
Areas we cover
GOLDGCP matches homeowners with interior designers across greater Houston:
- Houston
- Katy and Cypress
- Sugar Land and Pearland
- Pasadena
- The Woodlands and Conroe
Enter your ZIP code to see design prices for your area and get matched.
How GOLDGCP works
- Tell us about the room or project through the form, a call or WhatsApp.
- You see prices for your ZIP code before anyone visits, and we match you with up to 3 vetted pros.
- Our in-house architects take over the parts that touch structure, permits or an addition.
- You approve each stage and release each milestone payment, and you follow the project in the client portal.
Pros pass six-step vetting before they get a job: license verification where the state requires one, an insurance check, a background and business check, a portfolio review, client reference calls and onboarding with a quality score. For a kitchen redesign, our Houston kitchen remodeling guide covers the hood, gas and outlet rules.
Frequently asked questions
How much does an interior designer cost in Houston?
Most Houston projects come to about $1,550 to $9,150 for design work and furnishings together, using HomeGuide's national range at the Texas cost factor of 0.82. Hourly rates run about $41 to $370, depending on experience. Sales tax of 8.25% applies to furniture bought in Houston.
Do interior designers need a license in Texas?
No. Anyone may practice interior design in Texas. The state protects only the title "registered interior designer," which TBAE grants to designers who hold the national CIDQ certificate. State law lets anyone draw plans for a house, but the City of Houston may require an engineer's seal for structural changes.
What is a registered interior designer in Texas?
A designer who has passed the NCIDQ exam, holds the CIDQ certificate, met TBAE's education and experience rules and registered with the Texas Board of Architectural Examiners. Registered designers take continuing education every year. TBAE's online search confirms a registration by name, city or number.
Can an interior designer remove a wall in my Houston home?
They can design the change, since Texas law lets anyone prepare plans for a single-family home. The City reviews a floor plan change using plans that show the ceiling framing, and removing a load-bearing wall may require an engineer's seal, so a structural engineer often joins the team.
Do I need a permit to redecorate in Houston?
Not for paint, wallpaper, tile, carpet, cabinets or countertops. New circuits and moved plumbing need trade permits from licensed pros registered with the City, and changing the floor plan needs a remodel permit with plans and 1 to 15 business days of review.
How do Houston interior designers charge for furniture?
Usually through cost plus, 17% to 45% added to the net price, or a markup on retail of 10% to 35%. Product deposits of about 50% are common. Furniture bought in Houston or Katy also carries 8.25% sales tax, so ask how it appears on the invoice.
Does a Houston historic district review interior design changes?
No Certificate of Appropriateness is needed for interior alterations, according to the Houston Office of Preservation's exemption list. Exterior changes visible from the street do get reviewed. A building permit may still apply to interior work, depending on what you change.
How we calculate these prices
GOLDGCP starts from national price ranges for each job, taken from published 2026 cost guides and checked against local price guides where they exist. To get a local price, we multiply the national range by the construction cost factor for the metro from the U.S. Army Corps of Engineers Area Cost Factors (US average = 1.00). Where that table has no entry for a metro, we use the nearest listed location or the state value. For ZIP codes outside the 50 largest metros, the cost estimator uses the state's price level from the Bureau of Economic Analysis Regional Price Parities. Ranges include labor and standard materials but not unusual site conditions, so a written quote after an inspection is always the final price.
Sources
- How much does an interior designer or decorator cost? · HomeGuide
- Registered Interior Designers · Texas Board of Architectural Examiners
- Bill Analysis, H.B. 1894 (86th Legislature) · Texas Senate Research Center
- City Sales and Use Tax rates · Texas Comptroller of Public Accounts
- May 2023 OEWS Estimates: Houston-The Woodlands-Sugar Land, TX · U.S. Bureau of Labor Statistics
- Residential Permitting 101 · Houston Permitting Center
- Occupations Code 1051.606: Applicability · Texas Legislature (via Justia)
- NFIP Technical Bulletin 2: Flood Damage-Resistant Materials Requirements (2025) · FEMA
- Area Cost Factors, PAX Newsletter 3.2.1 (2024) · U.S. Army Corps of Engineers
- Regional Price Parities by State · U.S. Bureau of Economic Analysis
About this guide
Written by the GOLDGCP editorial team. Prices come from national cost guides adjusted with official construction cost factors for Houston; rules and statistics come from the agencies and reports linked in the text. We update this page when prices or codes change.