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Additions & ADUs · Casselberry, FL

Additions & ADUs in Casselberry, FL

Room additions, second stories, in-law suites and ADUs in Casselberry — engineered, permitted and built from foundation to finish by one licensed team.

Licensed & insured · Lic. #CGC1539321
Seminole County permitting handled
4.9★ · 433+ projects
Serving Casselberry from Oviedo

Free Additions & ADUs Estimate

We typically reply the same business day.

Lic. #CGC1539321
4.9 Star Rated
433+ Projects
10+ Years
Licensed & Insured

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.

More space, matched to your home and your local code

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.

Additions & ADUs · Casselberry

More space, matched to your home and your local code

01

Room & primary-suite additions

Add a bedroom, primary suite, or great-room bump-out with a foundation and roofline that match the existing home.

02

Second-story additions

Build up when you can't build out — engineered for the existing structure and Florida wind loads.

03

ADUs & in-law suites

Detached or attached accessory units and garage conversions for multigenerational living or a home office, built to local code.

04

Engineering & permits

We coordinate the structural engineering, permitting, and any HOA/ARB review so the addition is legal and lasting.

Casselberry, Seminole County

What a home addition in Casselberry involves

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.

At a Glance

Additions & ADUs in Casselberry — the local details

City
Casselberry, FL
County
Seminole County
Permit authority
City of Casselberry Building Division
Jurisdiction note
Casselberry issues its own building permits.
Neighborhoods served
Legacy Park, Deer Run, Sausalito, Lake Concord, Camelot
Contractor license
CGC1539321 — licensed & insured Florida general contractor
Local Knowledge

Additions & ADUs in Casselberry

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.

Neighborhoods we serve in Casselberry

Legacy Park Deer Run Sausalito Lake Concord Camelot

Serving all of Casselberry and the surrounding Seminole County area.

Permits in Casselberry

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

Our Work

Additions & ADUs projects

A sample of additions & adus work by our team.

Additions & ADUs project by Right Image Builders
Additions & ADUs project by Right Image Builders
Planning Ranges

What Casselberry home addition projects typically cost

Typical planning ranges for a Casselberry addition or ADU. Planning ranges only, not a quote — final pricing depends on size, foundation and site.

ProjectTypical rangeNotes
Room addition$40,000 – $120,000Size, foundation, finishes
Second-story addition$150,000 – $300,000+Structural reinforcement, new stair, roof
ADU / garage conversion$50,000 – $180,000Detached 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.

Get In Touch

Plan your Casselberry addition or ADU

Call (321) 805-0845 or send your project details — we’ll get right back to you.

Additions & ADUs FAQ

Common questions

It depends on your city or county's zoning, lot size, and setbacks — the rules differ across Oviedo, unincorporated Seminole County, and Orlando. We check what applies to your specific lot before you spend money on design. In Casselberry, that review goes through City of Casselberry Building Division, and we build their turnaround into the schedule we give you.
Most room additions run about 3–5 months from permit to finish; second stories and ADUs take longer. Engineering and permitting happen before we break ground, and we give you a schedule up front. For Casselberry specifically: Casselberry issues its own building permits.
Yes — additions require structural engineering and permitting, and we coordinate both, plus any HOA or architectural-review approval, as part of the project. We do this work across Casselberry and the wider Seminole County area from our base in Oviedo.
An addition expands your existing home; an ADU is a separate living unit with its own kitchen and bath, whether detached or a garage conversion. They're permitted differently — we'll explain which fits your goal. If your project is in Casselberry, we'll walk the space with you before quoting.
Yes — Right Image Builders serves all of Casselberry and Seminole County from our base in Oviedo. Call (321) 805-0845 or request a free estimate.
City of Casselberry Building Division. Casselberry issues its own building permits. We handle the permitting for your project either way.
All of it — including Legacy Park, Deer Run, Sausalito, Lake Concord, Camelot — plus the surrounding Seminole County area. If you're not sure whether your street is inside the city limits, tell us the address and we'll confirm which building department reviews the work.
More in Casselberry

Other services we provide in Casselberry

Plan your Casselberry addition or ADU

(321) 805-0845
Call (321) 805-0845 — Free Estimate