Architect, Interior Designer, or Design-Build Firm?
What the label doesn't tell you about a NYC renovation
Someone who has just closed on a prewar co-op or a brownstone in Brooklyn runs into this less neatly. There's an architecture firm whose work feels right, an interior designer offering a highly resolved interior, and a design-build company that says it will handle the whole renovation. All three can look capable of delivering the same finished home. That's why portfolios, how fast someone answers an email, and which route seems simplest end up doing most of the comparing.
None of that tells you much about how the project will actually run. It doesn't show who will lead the design, who will file the drawings and stand behind them, where the interior scope ends and the architectural scope starts, or what's underneath phrases like "full service" and "in-house architect." Those things stay invisible until you set the labels aside and look at how the team is built.
Illustration 1:
One Project,
Different Roles
One Project,
Different Roles
Architect and interior designer describe design roles; design-build describes how the work is delivered. Setting them side by side compares two different kinds of thing.
Why comparing an architect, an interior designer, and a design-build firm is already a mismatch
Architect and interior designer are design roles, or disciplines. Each has a scope of what its members are trained and, in some cases, licensed to do. Design-build is something else. It's how the design and the construction get delivered. Instead of the homeowner holding one agreement for design and a separate one for construction, the two sit inside a single delivery structure. It says how the work is organized. It doesn't say what anyone on the team is qualified to do.
So the second a homeowner lines these three up as parallel choices, the comparison is already tilted. Two of them describe who does the design work. The third describes how the design and the construction are packaged together. You can have an architect working inside a design-build arrangement. You can hire an architect and an interior designer separately and have them coordinate. Where a project needs architectural services, an appropriately licensed professional still has to do that part. The only open question is who that person is and how they're attached to the arrangement.
The everyday shorthand, that architects handle walls and permits while designers handle finishes and furniture, is true enough to say once and then leave alone. It describes the disciplines. It says nothing about how they'll be organized on a given project.
What each of these actually represents on a real project
Work is architect-led when the architecture of the property itself is being reconsidered in a real way: walls moving, layouts changing, two units getting combined, structural work, egress or use changing, anything that touches the building's systems or its permitted configuration. That work runs on architectural services, and in New York much of it can't be filed with the city except by an appropriately licensed professional.
Work is interior-design-led when the architectural framework is mostly settled and the design lives in the interior resolution: kitchens, bathrooms, millwork, lighting, materials, finishes, furnishings. A lot of what makes a renovated apartment feel considered gets decided here, and on plenty of
These aren't exclusive options. A substantial renovation often has both an architect and an interior designer on it, running in parallel rather than as an either/or, with the architectural and interior scopes coordinated across the same project. Some architecture firms do interiors in-house, which can mean one integrated team or two loosely joined ones under a single name.
One thing holds across all of these setups. Where regulated architectural or engineering work is involved, having an interior designer on the project doesn't remove the need for the licensed professional who carries that work. The interior scope and the architectural scope can sit in one firm or across several. The regulated part still has to land on someone qualified to hold it.
Architecture + Interiors
The label is not the team
The same looseness runs through the other labels. An "architecture firm" might carry interiors in-house or hand them off. A firm advertising "architecture and interiors" might mean one integrated team or two coordinated ones. The label is a category the firm stands in. It isn't a description of how the firm is built.
This is close to the confusion a homeowner on Brownstoner was circling when they described weighing "a design build firm who claim to do it all" against hiring the pieces separately, and couldn't get a straight answer on why anyone would insist the two roles stay independent.[¹] The instinct that something structural was at stake was right. The words to name it weren't there, because the label had swallowed them.
The question underneath:
who is responsible for what
Some of that gets assigned by the city, not chosen by the firm. For most substantial NYC renovation work that needs a permit, the construction documents have to be prepared, signed, sealed, and filed by a New York State Registered Architect or Professional Engineer, who becomes the Applicant of Record for that filing.[²]
That role is specific, and it isn't the same as "the person leading the design." It attaches to a particular filing, not to a project or a personality, and a big job can carry several Applicants of Record across its different filings.[²]
So when a firm says "we handle the permits," the homeowner has learned less than that sounds like. The real content is in a narrower question: who, by name and license, is the Applicant of Record, and how does that person connect to the people the homeowner has actually been talking to.
This is the gap between the person who's impressive in the room and the person whose seal is on the drawings. They're often not the same person. Homeowners tend to treat the drawings as a commodity any competent party can turn out, which is why the question of who produces them and stands behind them so rarely gets asked.
It's the question that decides who is accountable when a filing draws an objection, when the design has to change under pressure, when a condition nobody planned for shows up during demolition.
In New York, who holds the architect's contract is not a formality
In New York, architectural services have to be contracted directly between the homeowner and a licensed architect or an authorized professional firm. A general contractor, or any general business entity that isn't itself authorized to provide architectural services, can't offer or sell those services to a homeowner, including through an architect it employs.
The state's guidance is explicit that "architectural services may not be provided by or through a general business corporation," and that signing and sealing documents for a client's project is exactly the kind of service that has to run directly to that client.[³] Its guidance describes the setup where a general contractor offers architecture services to a client, the setup it calls one "typically referred to as 'design-build,'" as one that "may be seen as a violation of the Education Law."[⁴]
This is easy to overstate, and the overstatement is wrong. New York does not prohibit design-build.
A design-build project can be structured lawfully, with the architectural services contracted directly to the owner through an authorized professional entity and the construction handled alongside it. What the state flags as a problem is narrower. It's an unlicensed contractor packaging the architecture into its own contract and offering it to the homeowner as if the firm itself were the design professional.
The delivery method isn't the issue. A setup described simply as "one company, one contract, our architect" still warrants a closer look.
For the homeowner, none of this means learning the regulation. It means noticing that a real question sits under a comfortable-sounding promise. When a firm offers to handle design and construction under a single agreement, "who is my architectural contract actually with" isn't a technicality, and the firm's label won't answer it.
"Full service" and "in-house architect" are not structures
"Full service" sounds like completeness, but it has no settled scope. It can take in the board or alteration package, DOB filing, Landmarks review where it applies, engineering coordination, bidding, construction administration, procurement, and closeout. Or it can cover some of those and leave the rest for the homeowner to find out about partway through.
Two firms can use the same phrase and be offering very different amounts of work. The only way to compare them is to make the scope explicit, to ask what "full service" covers here, item by item, until the phrase turns into an actual list.
"In-house architect" is the other one. It's meant to reassure. The architecture is handled, it's under one roof. But "in-house" describes where the architect sits, not what the
Even where the arrangement is completely proper, "in-house" says nothing about what the architect's contractual and professional relationship is when the design and the construction pull in different directions. That's a question about contract and obligation, and the phrase itself doesn't answer it.
The convenience these phrases promise is real. The point isn't that a single point of contact is a bad thing to want. It's that "one company, simpler" describes the homeowner's experience, not how the work is allocated behind it, and a serious renovation eventually gets to the second thing.
None of this is visible in a portfolio or a first meeting
Neither one shows who will be the Applicant of Record, whose contract the architecture runs through, what "full service" leaves out, or where the architect stands contractually when the drawings and the build come apart. Those facts sit under the surface the labels present.
The homeowner comparing three firms isn't wrong to want the comparison to be simple. It's that the label was never carrying the information the decision turns on.
What an architect, an interior designer, and a design-build arrangement each represent is worth knowing. It isn't, on its own, enough to tell you who is standing behind the project.
FAQ
Who is legally allowed to file my NYC renovation with the Department of Buildings?
For most substantial renovation work that needs a permit, the construction documents have to be prepared, signed, sealed, and filed by a New York State Registered Architect or Professional Engineer, who becomes the Applicant of Record for that filing. The role attaches to a specific filing rather than to the whole project, and a larger job can carry more than one Applicant of Record.[²]Does "design-build" mean the firm has an architect on staff?
Not necessarily, and the term doesn't tell you either way. "Design-build" describes how the design and the construction get delivered together, not who does the work inside that structure or how the professional and contractual relationships are arranged. One design-build firm is construction-led with a designer on staff. Another is design-led with architects at its center. A third subcontracts much of both. The label doesn't separate them.Can a general contractor provide architectural services through its own in-house architect in New York?
Not to a homeowner as a client. New York requires architectural services to be contracted directly between the homeowner and a licensed architect or an authorized professional firm. A general contractor, or a general business entity that isn't itself authorized to provide architectural services, can't offer or sell them to a client, including through an architect it employs.[³] This doesn't make design-build unlawful. A design-build project can be structured properly, with the architectural contract running directly to the owner through an authorized entity.[⁴]What does "full service" actually include on a NYC renovation?
There's no fixed definition. "Full service" can cover the board or alteration package, DOB filing, Landmarks review, engineering coordination, bidding, construction administration, procurement, and closeout, or only some of those. Because two firms can use the same phrase and mean different scopes, the only way to compare is to ask what the phrase covers, item by item, until it turns into a list.Do I need both an architect and an interior designer for a gut renovation?
Often a substantial renovation involves both, and they aren't mutually exclusive. The better question is how the two are organized, in one firm or in two coordinated ones, and how authority over layout, kitchens, bathrooms, lighting, millwork, and detailing gets divided between them. Where the work materially affects the architecture of the property, having an interior designer on it doesn't remove the need for the licensed professional who carries the regulated architectural or engineering scope.[1] Brownstoner community forum, Design Build Firm vs Architect – Contractor Combo? Homeowner discussion, used for recognition of homeowner confusion only, not as factual authority.
[2] NYC Department of Buildings, Registered Design Professional / Applicant of Record.
[3] NYSED Office of the Professions, Professional Practice for Architecture: Architects Employed, or Retained, by Contractors.
[4] NYSED Office of the Professions, Professional Practice for Architecture: Practice; corroborated by State Board for Architecture board package, August 16, 2023.
Regulatory and professional-source information was reviewed August 20, 2026. Requirements and standard documents change. Obligations depend on the property, jurisdiction, participants, and agreements involved.
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