Room additions, second stories, in-law suites and ADUs in Casselberry — engineered, permitted and built from foundation to finish by one licensed team.
We typically reply the same business day.
Right Image Builders is a licensed and insured Florida general contractor (CGC1539321) in Oviedo, building home additions and ADUs across Casselberry and Seminole County. Room additions, second stories, in-law suites, and garage conversions — structural engineering, permitting, and construction under one contract. 4.9★, 433+ projects.
Adding on is the most structural work a home can undergo — foundation, framing, roofline, and tie-ins all have to be engineered and permitted correctly. We manage the whole process, from feasibility and design through permits and final finishes.
Additions and accessory dwelling units (ADUs) are handled differently by each jurisdiction — the City of Oviedo, unincorporated Seminole County, and the City of Orlando each set their own rules. We build to what actually applies to your Casselberry lot.
Add a bedroom, primary suite, or great-room bump-out with a foundation and roofline that match the existing home.
Build up when you can't build out — engineered for the existing structure and Florida wind loads.
Detached or attached accessory units and garage conversions for multigenerational living or a home office, built to local code.
We coordinate the structural engineering, permitting, and any HOA/ARB review so the addition is legal and lasting.
We work throughout Casselberry — from Legacy Park and Deer Run to Sausalito, Lake Concord, Camelot. Casselberry is a lake-dotted Seminole County city along the US-17/92 corridor, and it sits in Seminole County, part of the Greater Orlando area we cover from our base in Oviedo.
Permitting for a Casselberry home addition goes through City of Casselberry Building Division. Casselberry runs its own building department, so plan review and inspections stay local. We deal with that office directly on your behalf.
Alongside Casselberry, we regularly take on work in nearby Seminole County communities including Winter Springs, Longwood, Lake Mary and Sanford.
Every Casselberry home addition we take on is run by the same licensed general contractor (CGC1539321) that pulls the permit — so there is one point of accountability from the first walkthrough in Legacy Park or Deer Run through final inspection with City of Casselberry Building Division.
Casselberry is a lake-dotted Seminole County city along the US-17/92 corridor. We cover the whole city — Legacy Park, Deer Run, Sausalito, Lake Concord, Camelot — and the surrounding Seminole County area, with plans filed through City of Casselberry Building Division.
Serving all of Casselberry and the surrounding Seminole County area.
Permit authority: City of Casselberry Building Division
Casselberry issues its own building permits. We pull the permits and manage the inspections as part of your project.
County: Seminole County
A sample of additions & adus work by our team.


Typical planning ranges for a Casselberry addition or ADU. Planning ranges only, not a quote — final pricing depends on size, foundation and site.
| Project | Typical range | Notes |
|---|---|---|
| Room addition | $40,000 – $120,000 | Size, foundation, finishes |
| Second-story addition | $150,000 – $300,000+ | Structural reinforcement, new stair, roof |
| ADU / garage conversion | $50,000 – $180,000 | Detached vs. conversion, utilities, kitchen/bath |
These are typical planning ranges — not a quote. Every project is priced after we see the space. Permit and inspection fees charged by City of Casselberry Building Division are separate and vary by scope, and we itemise them for your Casselberry estimate rather than burying them in a lump sum.
Call (321) 805-0845 or send your project details — we’ll get right back to you.