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Serving Fullerton, CA and surrounding areas. (657) 354-1477
Custom Fullerton Sunrooms provides sunroom remodeling and new sunroom additions for Whittier homeowners, working on postwar ranch homes, Friendly Hills custom properties, and everything in between. We serve all of Whittier - from Uptown to the south hills - and reply to all inquiries within one business day.
A lot of Whittier homes have patio enclosures or screen rooms added in the 1980s and 1990s that are now leaking at the roof joints, drafty at the panel seals, or structurally questionable. Rather than tearing out a functional-but-aging enclosure, a targeted sunroom remodel replaces what has failed - panels, gaskets, flashing, framing members - and brings the room up to a standard where it is weathertight and comfortable again. For Whittier homeowners who have a room they already use but is no longer performing, a remodel is typically faster and less expensive than a full demolition and rebuild.
About 55% of Whittier homes are owner-occupied, and many residents have lived in their homes for 15 to 25 years. For those homeowners, a permitted sunroom addition is a long-term investment in a property they plan to keep. A properly attached and fully permitted addition increases usable square footage in a way an appraiser can recognize, which matters when it is time to refinance or eventually sell. Whittier's postwar ranch homes typically have rear yards that accommodate an addition without reducing the yard to an unusable size.
Many Whittier ranch homes have an existing covered patio slab in the backyard that gets used in the spring but becomes too hot in summer and too exposed in winter. Enclosing that slab with glass or screen walls converts an underused outdoor area into a year-round room without the cost and permitting timeline of a full structural addition. Whittier's hot, dry summers and occasional heavy winter rains make a weathertight enclosure - rather than just a cover - worth the investment for homeowners who want to actually use the space in every season.
Whittier's climate does not produce the freezing winters that make a four season sunroom essential in colder states, but the city's hot summers absolutely benefit from it. A four season room uses insulated framing, thermally broken glass, and an integrated HVAC system to keep the room at a comfortable temperature when it is 95 degrees outside. For Friendly Hills homeowners who are investing more in a custom build and want a room that functions as genuine interior square footage in all weather, a four season build is the right standard.
Whittier gets Santa Ana wind events every fall that blow debris across yards and into open outdoor spaces. A screen room keeps the backyard usable during those events - keeping out leaves, insects, and airborne debris - while still letting air circulate. For homeowners near Whittier Narrows who have mature trees on or near the property, a screened enclosure is a practical way to extend the usable season in the backyard without building a fully enclosed room.
Whittier's Friendly Hills neighborhood has larger, hillside lots with custom homes that vary considerably in roofline, footprint, and rear yard configuration. A standard kit sunroom does not always attach cleanly to a home with an irregular roofline or a slab that sits on a slope. A custom sunroom is designed around the specific attachment wall, roof pitch, and lot grade of each property, so the finished room looks like it belongs to the house rather than being bolted onto it as an afterthought.
Whittier is a city of about 87,000 people in Los Angeles County, and a large share of its homes were built between the 1940s and 1970s. That means most of the housing stock is now 50 to 80 years old - old enough that original concrete flatwork, stucco exteriors, and wood framing have all been through decades of hot summers, wet winters, and seismic activity. The city was directly affected by the 1987 Whittier Narrows earthquake, a 5.9-magnitude event that caused damage to older buildings and homes throughout the area. Even without a major event, smaller tremors that are routine in this part of Southern California shift foundations, open hairline cracks in stucco, and loosen masonry over time. A sunroom contractor working in Whittier who does not check the attachment wall and slab condition before starting is setting up the homeowner for problems that show up after the work is done.
The Friendly Hills area in southern Whittier adds a different dimension. Those hillside lots have custom homes with irregular rooflines, sloped slabs, and drainage considerations that flat-street ranch homes do not require. Slope stability, proper drainage routing away from the structure, and anchoring to sloped footings are standard concerns on Friendly Hills jobs that rarely come up on a flat-lot Uptown property. Whittier also experiences Santa Ana wind events every fall - hot, dry gusts that can reach 50 mph or more - which put real stress on older patio enclosures and accelerate the breakdown of roof flashing and panel seals. According to the California Geological Survey, expansive clay soils throughout the Los Angeles Basin are a documented cause of concrete slab and foundation movement - a condition that affects Whittier properties and that a contractor needs to account for before framing begins.
Our crew works throughout Whittier regularly, and we understand the local conditions that affect sunroom contractor work here. We submit permit applications to the City of Whittier Building Division and are familiar with the plan check process for residential room additions and patio enclosures. The city processes permits for straightforward residential additions in two to three weeks, and our plans are prepared to meet Whittier's current building code requirements without revisions that add weeks to the schedule.
Whittier has a well-defined geography that affects how we schedule and stage jobs. The flat residential streets around Uptown Whittier and the neighborhoods near Whittier College provide easy vehicle and equipment access. Friendly Hills in the south end of the city is a different situation - narrower roads, steeper grades, and properties with longer driveways mean we plan staging and material delivery differently for those jobs. We know which streets near Whittier Narrows have overhead clearance issues for material delivery, and we know which Friendly Hills lots require a smaller footprint for equipment.
Whittier is adjacent to several communities we also serve regularly. We work in La Mirada to the south, where the housing stock is similar in age and style to Whittier's ranch neighborhoods, and in La Habra to the east, where we see comparable postwar construction and permit timelines.
Reach us by phone at (657) 354-1477 or submit the contact form online. We reply to all Whittier inquiries within one business day - no automated queues, no waiting a week for a callback.
We visit your Whittier home to assess the slab or foundation, the attachment wall, the existing patio cover structure if present, and the lot configuration. We give you a written estimate covering the full scope before any work begins - there are no hidden costs added after you sign.
For permitted additions, we submit plans to the City of Whittier Building Division and schedule construction to begin once plan check clears - typically two to three weeks. You do not need to manage the permit process; we handle it.
On-site construction runs two to six weeks depending on project scope. We conduct a final walkthrough with you before we leave the job, and we handle the city final inspection so the permit is closed correctly and the work is on record.
We serve all of Whittier and reply within one business day. No pressure, no obligation - just a straight answer about what your project would involve.
(657) 354-1477Whittier is a city of about 87,000 people in Los Angeles County, located roughly 12 miles southeast of downtown LA. It has its own distinct identity - a historic downtown in Uptown Whittier, a small liberal arts college in Whittier College, and a mix of residential neighborhoods that range from flat postwar streets near the city center to the rolling hillside properties in the Friendly Hills area to the south. Most of the city's housing stock was built between the 1940s and 1970s, and the dominant style is the single-story California ranch home - stucco exterior, low-pitched roof, attached garage, and a rear yard with a concrete patio slab.
Friendly Hills is a notably different pocket of the city - larger custom homes on sloped lots, more varied architectural styles, and bigger rear yards with more complex site conditions. Outside of Friendly Hills, Whittier's neighborhoods are relatively uniform in lot size and building type, which makes it a city where a contractor who has worked here before knows what to expect when they arrive at a new property. We also serve neighboring communities including La Mirada and Buena Park, both of which have similar postwar housing stocks and comparable project profiles.
Keep bugs out while enjoying fresh air with a screened outdoor room.
Learn MoreConvert your existing patio into a fully enclosed sunroom space.
Learn MoreTurn your underused deck into a comfortable, weather-protected sunroom.
Learn MoreProtect your patio from the elements with a durable cover structure.
Learn MoreCall us today or submit a free estimate request - we serve all of Whittier and respond within one business day.