Short version: the design fee for a single room usually runs $1,500 to $5,000, before you buy anything. Living rooms and primary bedrooms sit at the higher end; kitchens and baths cost more still because of cabinetry and trades; bedrooms and offices are the most affordable. Furnishings are separate, and usually the bigger number. Want a plan without the full commitment? A single-room consultation is about $350 to $500.
"How much per room" is the question everyone actually wants answered, and most guides dodge it with "it depends." It does depend, but you still deserve numbers. Below are the ranges I quote in the Greater Philadelphia market in 2026. Two rules first: these are design fees unless noted, and furniture is always separate. For the full picture on how designers charge, see how much an interior designer costs.
Cost per room, at a glance
| Room | Design fee | Furnishings (typical) |
|---|---|---|
| Living room | $2,000 – $5,000 | $8,000 – $40,000+ |
| Primary bedroom | $2,000 – $4,500 | $6,000 – $25,000 |
| Dining room | $1,500 – $3,500 | $5,000 – $20,000 |
| Home office | $1,200 – $3,000 | $3,000 – $12,000 |
| Guest / kids' bedroom | $1,200 – $2,800 | $3,000 – $10,000 |
| Kitchen (with reno) | $3,500 – $8,000+ | $25,000 – $100,000+ |
| Bathroom (with reno) | $2,500 – $6,000 | $15,000 – $60,000+ |
| Single-room consult | $350 – $500 (plan only, no full-service management) | |
Ranges are typical for this market and move with the size of the room, the scope, and the level of the furnishings you choose. Kitchens and baths carry a much wider furnishing range because they fold in cabinetry, counters, tile, and trade labor.
Room by room
Living room
Usually the priciest furnishing-only room, simply because of volume: seating, case goods, rugs, lighting, window treatments, art. The design fee reflects the number of decisions. It's also the room where a designer earns their fee back fastest, because getting the big-ticket pieces right the first time avoids expensive do-overs.
Primary bedroom
High on the list because people increasingly treat it as a retreat, custom bedding, layered lighting, seating, sometimes built-ins. The design is intricate even though the footprint is smaller than a living room.
Kitchen and bathroom
The most expensive rooms, full stop, because they involve cabinetry, countertops, plumbing, and multiple trades on top of the design work. Here a designer's coordination is worth the most, and the design fee is a small fraction of the total.
Dining room, office, secondary bedrooms
The most budget-friendly rooms to design. Fewer pieces, fewer decisions, and often you're keeping some existing furniture. A great place to start if you want to work with a designer without a large first commitment.
What moves the number
- Furnishing level. The single biggest driver. Retail, trade, and custom pieces span a 10x range for the same room.
- Scope. A refresh using some existing pieces costs far less than a gut renovation.
- Room size and complexity. More square footage, more windows, tricky layouts, all add hours.
- How the designer charges. Flat-fee, hourly, or percentage each land differently. Always ask for an estimated total.
- Revisions. Indecision is billable. Clear priorities keep the fee down.
Not ready to commit to a full room? A Fresh Eyes Visit gives you a designer's eye and a written, act-on-it-yourself plan for one room, 90 minutes on site, plan in 48 hours, $350 to $500. It's the lowest-cost way to get real direction. Greater Philadelphia.
Room-by-room vs. whole home
People assume doing one room at a time is cheaper. Per room, it's often the opposite. A whole-home project spreads planning across many rooms and lets the designer buy and coordinate in one efficient pass, so the per-room design cost usually drops. The total is bigger, obviously. But the value per dollar tends to be better, and the house ends up cohesive instead of a patchwork of rooms designed years apart in different moods.
That said, phasing is completely valid, and smart when cash flow matters. The trick is to plan the whole house once, then roll it out in phases against that plan, so every room still belongs to the same story.
How to spend less without regretting it
- Start with a paid consultation. One session, one written plan, act on it at your own pace. Far cheaper than full service and often all a confident homeowner needs.
- Prioritize one or two rooms. Do the rooms you live in most, well, rather than the whole house thinly.
- Keep what works. A good designer builds around the pieces you love instead of replacing everything.
- Be decisive. Revisions are the quiet budget-killer. Know your priorities going in.
- Share your real budget. It's not something to hide, it's the tool that lets a designer steer you to the right choices.
The most expensive design is the one you redo. Getting the plan right once, whether that's a single consultation or full service, is almost always cheaper than guessing and buying twice. For the full pricing breakdown, read how much an interior designer costs, and if you're weighing who to hire, the questions to ask first.