Room Additions in Pasadena, CA from American Reliable Construction & Remodeling, a licensed general contractor (CSLB #1155602) headquartered on Ventura Boulevard in Sherman Oaks. We design, permit and build the project, with permits handled and one coordinator on site. For a free in-home estimate and a written, itemized quote, call (877) 702-6180.
CSLB #1155602 · Licensed, bonded & insured · BBB Accredited · A- Rating · 5.0 on Google (26 reviews)
Adding onto a Pasadena house means adding onto a piece of the city’s architecture. Craftsman bungalows, 1920s Spanish Revival homes and mid-century tract houses in Hastings Ranch each take additions differently, and the design has to respect rooflines, window proportions and trim profiles that give the house its character. A rear primary suite or family room is usually achievable; making it look original is the real work.
Pasadena is its own city with its own zoning code. Setbacks, height limits and lot coverage set the envelope for an addition, and properties in landmark or historic districts can require design or historic review for exterior changes. We check the zoning and any historic status for your address at the feasibility visit, before design begins.
American Reliable Construction & Remodeling designs, permits and builds additions in Pasadena from our Sherman Oaks office. One project coordinator runs design, structural engineering, City of Pasadena plan check and construction under CSLB #1155602, and the itemized estimate you sign is the same document the crews build from. Warranty available. Call for details.
Foundation and soil, structural work, roofline, utility capacity and finish level move the price.
Every home is different — your written estimate is itemized after a free in-home visit.
Read the Sherman Oaks room addition guideFeasibility, design and engineering come first, then City of Pasadena plan check — and any design or historic review, which we schedule in parallel. Review timing varies and we do not promise approval dates. Construction of a ground-floor addition runs several months once started. You receive a written, phased schedule before demolition.
“We recently completed a room addition along with a full roof customization, and the results are amazing. The team was professional, organized, and easy to communicate with throughout the entire project. The new room looks like it has always been part of the house, and the new roof was installed perfectly. Highly recommend their services!”
“I didn't think a bathroom could make that much of a difference until this one was finished. We kept the design pretty timeless with a walk in shower, porcelain tile, and a wood vanity, and it completely changed the feel of the space. It feels cleaner, more open, and just a lot more enjoyable to use every day.”
“Great experience with American Reliable Construction & Remodeling. They helped us with our ADU from start to finish and made the whole process smooth and stress-free. The team was professional, responsive, and delivered quality work. Highly recommend!”
We'll visit the property, answer the permit and layout questions, and put a written, itemized estimate in your hands — free, no obligation.
Published planning ranges are $350–$600 per square foot for a ground-floor addition and $500–$800 per square foot for a second-story addition. Foundation and soil, structural work, roofline, utility capacity and finish level move the price. Every home is different — your written estimate is itemized after a free in-home visit.
Tell us about your room additions project in Pasadena. We'll schedule an in-home visit and put a detailed written estimate in your hands — no obligation.
Two quick steps. We typically respond within one business day.
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