Monrovia sits right against the San Gabriel Mountains, and its streets are lined with Craftsman bungalows, Victorians and other older homes that give the town its character, from the blocks around Old Town on Myrtle Avenue up to the foothill lots near Monrovia Canyon Park. Adding a room to a house like that takes more thought than adding one to a newer tract home, and that thought shows up in the price. California Sunroom Price serves Monrovia and the surrounding areas, including Arcadia, Duarte, Bradbury and Sierra Madre.
This page focuses on two things that shape most Monrovia projects: the age of the house and the slope of the land. It also covers climate, cost drivers and how to get an exact price at a free in-home estimate.
Is an older Monrovia home a good fit for a sunroom?
Very often, yes. Many older homes have deep backyards, covered porches and rear patios that were built for outdoor living. The key is planning the room around the house as it is.
Older slabs and porches
A patio room can often be built on an existing slab, but slabs on older homes may have settled, cracked or been poured at uneven levels over the years. The estimator checks the slab first, because repair or new concrete is one of the biggest variables on an older property.
Walls, eaves and roof lines
Older homes often have deep eaves, unusual roof pitches and siding that differs from modern stucco. The room has to attach cleanly to the house, and the roof line has to work with the existing eaves. That can affect roof style and size.
Matching the character of the house
Patio rooms can be finished to match the home’s exterior, and frame colors, windows and doors can be chosen to suit a Craftsman or Victorian look. More detailed matching can add to the total, and the estimator can show where simpler choices still look right.
Removing old additions
Some older homes have an enclosed porch or an aging patio cover that was added decades ago. If it has to come down, removal becomes part of the project.
How much does a sunroom cost in Monrovia? What drives the price
Rooms are manufactured in California in hundreds of combinations, so the price follows your choices and your site. These are the main drivers.
Room type
Patio covers and pergolas are the simplest. Screen rooms and glass enclosures sit in the middle. Insulated patio rooms and full glass sunrooms are complete rooms at the higher end.
Size and roof style
Larger rooms take more materials. A studio roof with a single slope tucks neatly under the eaves of many one-story homes, as explained on our studio sunroom page. A cathedral roof adds a peaked ceiling and more height.
Glass
Low-E glass and other energy-efficient glass options keep a room comfortable in Monrovia’s summer heat. Our energy efficiency and tests page explains the options.
Foundation and slope
Level lots with sound slabs are the simplest. Sloped foothill lots and older, uneven slabs may need foundation work.
Access
Narrow driveways, detached garages at the back of the lot and mature trees can affect how materials reach the site.
Finishes
Doors, windows, frame colors, lighting and fans round out the cost.
How do foothill lots change the project?
The northern part of Monrovia climbs toward the mountains, and those lots bring their own planning.
Slope
A room on a sloped yard may need new footings or a raised base. That adds work, but it can also create a room with a view over the valley.
Mountain views
Homes near the foothills look up at the San Gabriels. A glass sunroom with a cathedral or solarium roof frames that view and brings in morning light.
Wind
Santa Ana wind events can push down off the mountains. Solid aluminum framing and correct anchoring are part of every installation, and exposed lots get extra attention.
Cool canyon evenings
Foothill homes cool off quickly after sunset. An insulated room keeps the space comfortable into the night.
Monrovia neighborhoods and lot types
Historic homes near Old Town
The blocks around Myrtle Avenue and the older core of the city have many Craftsman bungalows and Victorians on deep lots. Matching the house and checking older slabs are the main planning points.
Foothill homes near Monrovia Canyon Park
Homes on the upper streets sit on sloped lots with mountain views. Sunrooms that frame the view are popular, and site work is more likely.
Mid-century ranch homes
Across the flatter parts of the city, one-story ranch homes on level lots are some of the simplest sites for a patio room on an existing slab.
Townhomes and newer infill homes
Newer homes and townhomes often have small yards and association rules. Compact rooms, covers and screen rooms tend to fit here, and association approval may be required.
Sunroom, patio room or enclosure: which fits your Monrovia home and budget?
Insulated patio rooms
A patio room addition has a fully insulated roof, can often use an existing slab and can match the home’s exterior. For a den, office or guest room that works in every season, it is the most practical choice.
Glass sunrooms
Sunrooms bring in natural light and mountain views. Studio, cathedral, solarium and conservatory-style designs are available. A conservatory-style room can suit the look of an older home.
Enclosures and screen rooms
Enclosing an existing porch or patio cover keeps out insects and leaves for less than a full room.
Covers and pergolas
A cover shades a hot patio and can be enclosed later.
What are Monrovia homeowners using these rooms for?
The purpose of the room shapes the doors, windows, roof and size, so it is worth deciding before the estimate.
A garden room
Many older Monrovia homes have mature gardens and fruit trees. A glass room that looks out over the yard lets you enjoy it in every season.
An office with a view
A quiet insulated room with good light, facing the mountains or the garden, makes a pleasant place to work from home.
A family room off the kitchen
On homes with small original rooms, a patio room off the kitchen can become the everyday gathering space the house never had.
A place to host
A screen room or enclosure gives you a sheltered place for dinners and birthdays without bugs or wind.
How hot does it get, and what should you buy for it?
Monrovia is well inland, and summer afternoons in the San Gabriel Valley run hot, while winter nights can be chilly. For most homeowners, that makes an insulated roof the most important comfort feature. If you want a glass sunroom, Low-E glass and a solid roof section over the main sitting area help keep it pleasant. West-facing rooms benefit most.
Do you need a permit?
A room addition in Monrovia may require a building permit through the City of Monrovia. Older homes, homes in historic areas and hillside lots may have additional requirements, and townhome or planned communities may need association approval. We can talk through what may apply during the estimate.
How the free in-home estimate works
You can book a free, no-obligation estimate any day of the week between 9am and 9pm. In about 15 to 40 minutes, the estimator checks your slab, slope, eaves and access, then walks you through estimates, brochures and design layouts. You can ask every question and get an exact price. Installation by preferred contractors takes days, not weeks.
Ways to save: financing and current specials
Special financing programs are available to help spread out the cost. Current specials are also running for a limited time, with 20% off materials, 15% off rooms and free factory room upgrades. Every room carries a transferable lifetime factory warranty.
Which option fits your Monrovia home?
- Older home near Old Town: a patio room finished to match, or a conservatory-style sunroom.
- Foothill lot with a view: a glass sunroom with energy-efficient glass.
- Ranch home on a level lot: an insulated patio room on the existing slab.
- Tight yard or tight budget: a cover, screen room or enclosure.
Get your Monrovia sunroom price
Schedule a free in-home estimate, explore financing programs, or compare costs around the county on our Los Angeles County sunroom prices page.