How Much Construction Knowledge Should an Interior Designer Have?
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Interior designers who work on renovations and new construction need enough construction knowledge to advise clients on materials, quality, relative pricing, installation implications, and design decisions. They do not need to estimate construction costs, price labor, or become a contractor.
You should understand construction well enough to make informed design recommendations, anticipate how your selections affect the project and its timeline, and help your client make smart decisions before bids and change orders start coming in.
So how much construction knowledge does an interior designer actually need?
01 | Do Interior Designers Need to Know Construction Costs?
Right off the bat, I’ll tell you this: interior designers do not need to know exactly what the construction work will cost or what the building materials like drywall, lumber, subfloors, shower pans, and so on will cost. You also aren’t responsible for estimating demolition, electrical, plumbing, fabrication, or labor.
But you should understand relative price levels, and be able to advise your client on which product categories, quality levels, and brands to look at based on their budget.
Don’t specify Urban Electrics when their budget puts them in the Mitzi price point.
From there, you need enough context to understand whether a selection is likely to be more or less expensive and why.
02 | How Much Construction Pricing Should an Interior Designer Understand?
When you know what’s realistic for a mid-tier project budget versus a luxury custom project budget, you work more efficiently (no more endless rounds of revisions), and you can value engineer bids without sacrificing your client’s aesthetic, functional, or durability needs.
This is why I strongly recommend doing the work to understand where your projects typically come in, investment-wise.
Once you know that range (for example, maybe the kitchens you design normally come in around $200k), you can go deeper on the product lines that fit that level and suit the needs of your ideal clients, instead of trying to gain expertise in every product line at every price point.
Think about it the same way you already think about furnishing and fabric lines.
If you regularly specify Highland House and Rowe, you already understand the difference in their price points, customization options, cushion styles, fabrics, and durability levels. You don’t need to know every detail about every frame they manufacture, but you know enough to recommend the right line, product, and material for the project.
Construction materials and fixtures work the same way.
03 | What Construction Knowledge Helps Interior Designers Advise Clients?
Back in my wedding planning days, my couples ALWAYS asked me for referrals in every category. When I was first starting out, I didn’t have any because I was brand new. So I learned. I researched the vendors, learned their pricing and processes, and figured out the different levels of service and quality available.
I wasn’t a florist, but if a client told me she wanted peonies in January, I knew that was going to cost $$$$$, and I could tell her before we even got a quote that we’d either need to save in other areas to make it work or choose an option that created a similar look and feel for less.
That’s the exact understanding you need when it comes to construction materials.
Not providing specific costs, but the advising your client before the quote comes back and you have to reselect and redo part of the design because something is too expensive.
You should also know enough to understand the implications of what you are specifying, even when you aren’t the person responsible for pricing or installing it.
For example, you can choose a level 2 quartz and think, “Woo hoo, we’ll save money rather than using a level 10 marble”, but if you are also specifying a mitered front, a high backsplash with scalloped edge, and a shelf above the backsplash, that will greatly increase the install price, and you should be aware of that fact, NOT the exact dollar amount increase it will cause.
Some other areas where your design selections and specifications can impact price:
Tile material: large-format tile vs. small, individual pieces
Tile installation: regular running bond vs. a soldier border with herringbone inset vs. a more intricate pattern
Countertop material: level 2 quartz vs. a higher-end marble
Countertop details: eased edge vs. mitered or double-ogee edges, standard backsplash vs. a high scalloped backsplash or backsplash with a ledge
Flooring: understanding how the quality, construction, thickness, and wear layer of one engineered wood differs from another (like a 1/2” engineered with 2mm wear layer vs. a 3/4” with an 8mm wear layer)
Cabinetry: stock cabinetry in lower-impact rooms vs. semi-custom or custom in high-impact, high-use areas, plus details like inset vs. overlay or floating vanities
Plumbing: wall-mounted faucets vs. deck-mounted faucets and how the installation requirements could impact selection timing and installation price
04 | What Construction Materials Should Interior Designers Know?
If you’re a designer working on construction projects, here’s where Gloria and I recommend you focus your knowledge.
Flooring materials
Understand solid hardwood, engineered hardwood, LVP, and tile, including which options work best for different applications. You should be able to talk through factors like durability, maintenance, moisture, pets, kids, and general price differences.
Floor covering materials
Know the differences between wool, nylon, polyester, and natural fibers, including how they perform with pets and kids, how much maintenance they require, and where they generally fall in price.
Plumbing fixtures
Know whether a project budget puts you in Kohler territory or Waterworks territory, or somewhere in between. You don’t need to memorize every collection from every manufacturer. You should understand the general quality and investment level of the brands you regularly specify so you can guide your clients toward the right options.
Cabinetry
Learn the lines carried by a few local dealers plus at least one custom shop. Understand their general pricing, customization options, baseline quality, and why one line reads as builder-grade and another reads as high-end.
Again, the goal isn’t to become a cabinet dealer (well, you could!) but you do want to know enough to recommend the right quality level for the project.
Countertops
Understand the differences between quartz, granite, marble, soapstone, and quartzite, along with the quality and price differences among manufactured quartz brands. You should be able to explain why a client might choose one over another based on their budget, aesthetic, maintenance expectations, and how they use their home.
Installation details
Know which design choices tend to increase labor costs. A herringbone tile pattern, double-ogee edges, solid slab backsplashes, and wall-mounted faucets may all affect installation or fabrication costs. You don’t have to know exactly what they will cost. You just need to know enough to flag that they may cost more, require additional coordination, or need to be decided earlier in the process.
05 | What Else Should Interior Designers Know About Construction Projects?
If you work on construction projects, or want to, part of your responsibility is understanding enough about common brands, materials, quality levels, and installation requirements to help your clients make informed decisions and advocate for them throughout the process so they make a smart investment in their build or renovation.
Product knowledge is part of what allows you to do that.
You also need to know what belongs in your scope vs. the contractor’s, when decisions need to be made, how to collaborate without overstepping, and how to protect your time and profitability once construction begins.
That’s exactly what we cover in From Permits to Punchlists, our construction training for interior designers. You’ll learn how to define your role, collaborate with contractors, price construction administration, and guide clients from pre-construction through the punch list.They know how to design, but throw a contractor and a construction schedule into the mix and suddenly it gets very muddy where their role begins and ends.
Frequently Asked Questions About Interior Designers and Construction
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If you work on renovations or new construction, you should understand enough about materials, quality, relative pricing, installation requirements, and the construction process to make informed design recommendations.
You do not need to become a contractor, prepare the timeline, manage subs, or estimate the construction costs.
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Interior designers should understand relative price levels and which selections tend to increase costs.
You don’t need to know exactly what demolition, electrical, plumbing, fabrication, or labor will cost. Those numbers will come from the contractor and trades.
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You should understand enough about installation to know when a design choice may affect labor, fabrication, sequencing, or coordination.
For example: a floating vanity with a wall mounted faucet will need to be communicated well in advance so the proper preparation can be done to support the vanity weight and connect the plumbing.
You are not, however, responsible for directing the contractor’s means and methods of installation.
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Start with the materials and products you specify most often, including flooring, floor coverings, plumbing fixtures, cabinetry, countertops, and common installation details.
You don’t need expertise in every product line at every price point.
Focus on the categories and quality levels that fit the project budgets your firm typically handles.
