500 SF Room Addition+Bathroom

Published by Redline Republic | July 2025

The Vision

A growing family in El Cajon needed more living space—but didn’t want to move. Their plan? Build a 500 square foot room addition with a full bathroom at the rear of their property.

The challenge: the existing layout had setbacks, grade slope, and tight sewer access.

They needed a drafting and permitting team that could design smart, work fast, and guide them all the way through city approval.

Redline Republic’s Scope

We started with a site measure and zoning analysis to ensure the proposed footprint was legal—and maximized usable space.

✅ Created a full site plan with setbacks, slope, and drainage
✅ Designed the room layout + full bathroom (with window & venting)
✅ Coordinated Title 24 energy report
✅ Integrated new roofline to match existing home
✅ Spec’d out plumbing, electrical, and vent runs
✅ Prepared for city submittal in El Cajon Planning & Building

🛁 Bathroom Details

– ADA-clearance for future-proofing
– Rear window with tempered glazing
– Walk-in shower
– Quiet exhaust fan + smart switch
– Full drainage layout with cleanouts

🏗 Why El Cajon Needs Special Handling

El Cajon has a city-managed permit process (not county), and often requires:

– Full stormwater BMP notes
– Fire-resistive construction on property lines
– Property line certification for tight lot conditions
– Roof plan overlays showing how the addition connects

We’ve worked with El Cajon’s planning desk—we know what they check first.

💬 From Ronnie:

“A lot of people rush into additions and get stuck at plan check.
We plan it clean from the start, so it gets approved without delays.”

🔴 What This Service Includes:

✔️ Site measure & zoning check
✔️ Full drafted plan set
✔️ Title 24 + structural coordination
✔️ Electrical, plumbing, and drainage layouts
✔️ Permit submittal & revisions
✔️ Coordination support with your contractor

🏠 Ready to Add Space (Legally)?

Whether you need a bedroom, family room, or in-law suite, we can design and permit your addition the right way—without stress.

👉 [Start My Room Addition]
📞 (619) 717‑4528
📸 Instagram: @redlinerepublicx

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