Room Additions & Extensions

Add the room you've always wanted.

Primary suite expansions, sunrooms, libraries, home offices, and mother-in-law guesthouses. Permitted, engineered, and tied into your existing home like it was always there.

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Addition Types

Four common add-on projects.

Each one starts with engineering — load path, foundation tie-in, roof tie-in, and code review — before a single drawing is finalized.

Spacious primary suite addition with luxury spa bath and custom walk-in closet
Suite

Primary Suite Addition

A new primary bedroom, spa bath, and walk-in closet — 400–900 sqft of private retreat.

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Bright glass-walled sunroom addition with garden views
Sunroom

Sunrooms & Loggias

Glass-walled sunrooms and covered loggias, engineered for Florida hurricane code.

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Home office and library addition with floor-to-ceiling built-in bookcases
Office

Home Office & Library

A quiet, refined workspace with custom built-in bookcases and sound-rated walls.

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Two-story Florida home with a well-integrated second-floor addition
Up

Second-Story Addition

A full second floor over a single-story home — engineered foundation to roof.

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Room addition tied into existing kitchen and dining
Why MSA Premier for Additions

An addition that looks original.

The hardest part of an addition is making it look like it was always there. Roof lines, soffit details, paint matching, and floor transitions are where most additions fail. We obsess over those.

  • Engineered, not eyeballed

    Florida-licensed structural engineer on every addition. Foundation, roof tie-in, and load paths all stamped.

  • Roof & soffit match

    Same pitch, same overhang, same fascia detail. Same color shingles weathered the right amount.

  • Floor transition handled

    The new floor meets the existing at a flush transition. Subfloor heights are planned in design, not improvised on site.

  • Permitting in-house

    Broward and Palm Beach addition permitting is its own art form. We've pulled hundreds.

Serving South Florida — Room Additions

Common Questions

Room additions, answered.

How much does an addition cost per square foot?

In our market: $325–$525/sqft for a typical room addition with standard finishes, $475–$725/sqft for a primary suite with a spa bath and custom closets. Sunrooms with impact glass run higher per square foot because the glass is most of the cost. Second-story additions are the most expensive due to structural reinforcement.

How long does a typical addition take?

Design + permitting: 10–16 weeks. On-site build: 12–20 weeks for a 400–900 sqft addition. Foundation, framing, and roof tie-in are the gating items.

Will I need an engineer or architect?

Florida code requires engineered drawings for any addition that touches structure. We have in-house relationships with licensed engineers and architects — they're rolled into your contract, you don't have to coordinate separately.

Will the addition pass HOA review?

We design with your HOA's covenants in mind from day one. We prepare the HOA submission package (renderings, materials, site plan) and present at the architectural review board on your behalf.

Will my insurance need to know?

Yes — once the addition is complete and the certificate of occupancy is issued, you'll want to update your homeowner's policy to reflect the higher square footage and replacement value. We provide the documentation needed.

Can you tie an addition into an old roof line?

Usually yes, but it requires careful planning. Older South Florida homes often have 2:12 or 3:12 roof pitches that don't easily extend. We design the addition's roof to look intentional — sometimes as a perpendicular wing rather than a continuation.

Start Your Addition

Ready to add your dream room?

Free in-home consultation. We'll measure, talk through your vision, and follow up with concept sketches and a budget range.

HoursMon–Fri 8:00 AM – 6:00 PM, Sat 9–2