Homeowners planning a custom home, an addition, or a major renovation hear both words constantly: architect and engineer. They’re often used interchangeably, and they shouldn’t be. Architects shape how a building looks, flows, and lives. Engineers make sure it stands up, stays dry, and survives a hurricane.

Understanding the difference helps you hire the right people, avoid paying for services you don’t need, and recognize when a project needs both.

Key Takeaways

• Architects design space, form, and function; engineers design the systems that make the building safe.
• Florida law does not require an architect for a one- or two-family home, but structural engineering is almost always required for new construction and structural changes.
• Design-build firms coordinate both roles under one contract, which reduces gaps and finger-pointing.

What an Architect Does

An architect translates how you want to live into a buildable design. That includes:

• Site planning. Orientation for sun and breeze, views, privacy, and how the home meets the lot.
• Floor plans and flow. Room relationships, circulation, ceiling heights, sightlines.
• Exterior design. Massing, roof forms, materials, proportion, and how the home relates to its neighborhood.
• Code compliance. Egress, accessibility, fire separation, energy code.
• Coordination. Making the structural, mechanical, electrical, and plumbing pieces fit inside the design without compromising it.

Architects in Florida are licensed by the Department of Business and Professional Regulation under Chapter 481 of the Florida Statutes. Licensure requires an accredited degree, years of documented experience, and passing the national registration exams.

What an Engineer Does

Engineers apply physics and code to specific systems. On a residential project you may encounter several:

Engineer	What They Handle
Structural	Foundations, beams, load paths, wind and uplift resistance, connections
Civil	Site grading, drainage, stormwater, utility connections
Geotechnical	Soil borings and bearing capacity, especially on questionable or waterfront soils
Mechanical / Electrical / Plumbing (MEP)	HVAC sizing, electrical service, plumbing design on larger or complex homes

Structural engineers are the ones most homeowners meet. In Tampa Bay, their work is dominated by wind: roof-to-wall connections, shear walls, impact-rated openings, and the continuous load path that carries hurricane forces from the roof down into the foundation.

Engineers are licensed separately under Chapter 471 of the Florida Statutes and sign and seal drawings within their discipline.

What Florida Law Requires for a House

Here is where many homeowners are surprised. Under Florida Statute 481.229, no one is required to be a licensed architect to prepare plans for a one-family or two-family residence, regardless of cost. That exemption is why residential designers and design-build firms can legally produce house plans without an architect’s seal.

Structural engineering is a different matter. Building departments across Tampa Bay generally require signed and sealed structural drawings for new homes, additions, and any work that alters load-bearing elements. The Florida Building Code’s wind provisions make this nearly unavoidable in our region. Truss drawings, foundation designs, and wind-load calculations all typically carry an engineer’s seal.

Commercial buildings, multifamily projects, and anything intended for public use follow much stricter rules, and an architect’s involvement is usually mandatory.

When You Need an Architect

You’ll benefit from a licensed architect when:

• The home is complex, large, or on a difficult site
• You want a distinctive design rather than a modified stock plan
• The project is in a historic district with design review
• You’re building commercial, mixed-use, or multifamily
• You want a single professional responsible for the whole design vision

For a simple addition or a kitchen remodel that doesn’t touch structure, an experienced residential designer working with an engineer can be entirely appropriate.

When You Need an Engineer

You’ll almost certainly need a structural engineer when:

• Building any new structure, including an ADU
• Removing or modifying a load-bearing wall
• Adding a second story or a large addition
• Building in a flood zone or on a waterfront lot
• Repairing storm damage that affected the roof structure or framing

A civil engineer enters the picture when drainage, grading, or stormwater rules apply, which is common on larger lots and anywhere a new impervious surface changes how water leaves the property.

Why Design-Build Simplifies This

In a traditional arrangement, you hire an architect, the architect hires or recommends engineers, and then you separately bid the construction. If the drawings are hard to build or over budget, the parties often point at each other.

In design-build, one firm carries responsibility for design and construction. The architect or designer, the engineers, and the builder work as one team from the first sketch. Structural decisions get made with cost in mind. Changes get priced in real time. When something needs to be solved, one phone number answers.

TomCo Solutions operates this way through its architectural design studio, coordinating licensed architects and engineers alongside our construction team.

Frequently Asked Questions

Do I legally need an architect to build a custom home in Florida?

No. Florida Statute 481.229 exempts one- and two-family residences from the architect requirement. Many homeowners still choose one for design quality, but it isn’t mandated.

Do I need an engineer for a kitchen remodel?

Only if the remodel changes structure, such as removing a wall, enlarging a window opening, or adding weight the existing framing wasn’t designed for. Cosmetic remodels generally don’t require one.

Who signs the plans that go to the building department?

Whoever is licensed for the work shown. Structural sheets carry the engineer’s seal. Architectural sheets carry the architect’s seal when an architect is involved. Some jurisdictions accept unsealed architectural sheets for a single-family home, but sealed structural sheets are the norm.

Can one person be both?

Rarely. A few professionals hold both licenses, but they’re uncommon. In practice you’ll work with a team.

What does architectural design cost?

It varies with scope. TomCo design engagements start around $3,500, with complete plan sets for custom homes typically falling in the $8,000 to $40,000-plus range depending on complexity. Engineering is usually priced separately.

What’s the difference between an architect and a draftsperson?

A draftsperson produces drawings, often from someone else’s design direction. An architect is licensed to design buildings and takes professional responsibility for the design. Both have a place; the question is who is making the decisions.

Get the Right Team From the Start

Whether your project needs an architect, an engineer, or both, the biggest mistake is figuring it out after plans are drawn. TomCo Solutions assembles the right design and engineering team for your project and manages it through construction.

Schedule a private 30-minute consultation or call (813) 922-2299.