Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Window Company in Lake Forest, CA
Window and door work in Lake Forest comes down to three realities: hillside homes with expansive glass, summer heat that punishes cheap seals, and HOAs that expect replacements to blend in. Juniper Windows & Doors handles all three with written pricing before any work starts. We’re the windows-and-doors specialist inside the Relay Home Co. family – no general remodeling, no side trades. If you’re replacing a fogged picture window off Trabuco Road or upgrading a tired front door near El Toro Road, call (682) 281-2168 for a free estimate.
Why Lake Forest Homes Are Different
Lake Forest sits against the foothills of the Santa Ana Mountains, and that geography shapes nearly every window and door job here. Many homes in neighborhoods like Foothill Ranch and Portola Hills sit on slopes or ridgelines where afternoon sun hits glass hard from the west. That exposure shortens the life of builder-grade vinyl frames and turns failed seals into a common complaint. We see more fogged double-pane glass and warped patio-door tracks in Lake Forest than in flatter, shadier parts of south Orange County.
The housing stock matters, too. A large share of Lake Forest homes were built between the late 1960s and early 1990s, which means original aluminum-frame windows are still in place across tracts in areas like The Woods and Rancho de los Alisos. Aluminum conducts heat, so upstairs bedrooms in those homes run noticeably warmer in August. When we replace them with low-U-factor vinyl or impact-rated glass, homeowners feel the difference within days – not just in temperature, but in how much street noise from El Toro Road or the 241 toll road stops bleeding through.
HOA communities are widespread here, and many have architectural review requirements for any visible exterior change. That’s normal for us. We pull the right approvals, match frame colors to the development’s palette, and document everything in writing before install day.
Our Main Lake Forest Services
Homeowners in Lake Forest call us most often for two things: swapping out old windows and replacing doors that no longer seal or close right. Here’s what each job involves locally.
Window Replacement in Lake Forest
Replacement means removing the old sash and frame while leaving the surrounding stucco and trim intact. In Lake Forest, that approach matters – many homes have stucco exteriors where a full tear-out would mean patching, painting, and extra days of disruption. We measure for the opening, order the replacement unit to fit, and install it with new flashing and insulation. Most replacement projects in Lake Forest run two to five days depending on window count. See the full breakdown on our Window Replacement in Lake Forest page.

Window Installation in Lake Forest
Installation covers new construction or full-frame work: the opening is built or stripped to the studs, the new window is set, sealed, and trimmed out. Hillside lots in Foothill Ranch and Portola Hills often mean custom sizing and careful flashing – wind-driven rain hits differently on a ridgeline than it does on a flat street. We bring the right product line for the exposure, whether that’s impact-rated PGT for the hilltop homes or a standard low-E vinyl for interior-facing rooms. Details are on our Window Installation in Lake Forest page.

Door Replacement in Lake Forest
Front doors in Lake Forest take a beating from afternoon sun and, in some canyons, strong evening winds. We replace entry doors, French doors, and sliding patio doors with Therma-Tru and other trusted lines, set square so they latch clean and seal tight. HOA approval is often part of the process – we handle the paperwork and match the existing color scheme. Read specifics on our Door Replacement in Lake Forest page.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Lake Forest
We install and service PGT, CGI, CWS, and ES Windows products across Lake Forest, with parts and hardware stocked through our local supply channels. If a latch, balance, or weatherstrip on an existing window needs replacement, turnaround is typically a few days. See the full product scope on our brands page.
Pricing for Window Company in Lake Forest, CA
| Service | Typical range in Lake Forest |
|---|---|
| Standard window replacement (per window) | $600 – $1,400 |
| Full-frame window replacement (per window) | $900 – $2,200 |
| Impact-rated window upgrade (per window) | $1,100 – $2,600 |
| Entry door replacement | $1,500 – $4,500 |
| Sliding patio door replacement | $2,000 – $5,500 |
| French door replacement | $2,500 – $6,000 |
| Standard window installation (new opening, per window) | $800 – $1,800 |
| Custom window installation (per window) | $1,200 – $3,000 |
| Screen replacement (per screen) | $40 – $120 |
| Weatherstripping or seal repair (per window or door) | $75 – $250 |
What pushes a Lake Forest quote higher: second-story access on a hillside lot, custom sizing for non-standard openings, HOA-mandated frame colors, and impact-rated glass for ridgeline exposure. What doesn’t push it higher: surprises. Every project gets a written price before we order a single window. That number is the number.
Neighborhoods We Serve in Lake Forest
We work across the entire city, from Foothill Ranch and Portola Hills in the north to The Woods, Rancho de los Alisos, and the lake-adjacent tracts near Lake Forest Drive. Most appointments are scheduled within a few days, and we coordinate around HOA and community access rules where they apply.
- Foothill Ranch
- Portola Hills
- The Woods
- Rancho de los Alisos
- Lake Forest Keys
Service Area – Cities Near Lake Forest
Our Lake Forest crews also cover homes in neighboring south Orange County cities. If you’re in Laguna Woods, CA, Mission Viejo, CA, Laguna Hills, CA, or Aliso Viejo, CA, the same written-price standard and 365-Day Done Right Promise apply.
Serving Lake Forest, CA - Our Local Coverage Area
We’re based in the Lake Forest area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Window Company in Lake Forest
Most Lake Forest appointments are scheduled within two to four business days. Dispatch is coordinated from our Los Angeles office, but crews are local to south Orange County, so travel time doesn’t stretch the schedule. Call (682) 281-2168 and we’ll give you a specific slot.
In many Lake Forest communities, yes – especially for visible front-facing changes like entry doors or window frame colors. We handle the submission and follow whatever the association’s architectural committee requires. The estimate line-items any approval-related work separately, so nothing is assumed.
No. The price we put in writing before the job begins is the price you pay when it’s done. If hidden damage changes the scope, we document it and you approve any revision before we proceed – never after. Call (682) 281-2168 for a free estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local windows & doors pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Lake Forest Customers Say
"Front door looks great and shuts well. The threshold is sealed well and the lock lines up with the strike."
- Rory F."Quote came in the app with options for glass. Easy to compare."
- Vera L."Door replacement. Installer texted when on his way and finished by lunch. Tight and clean."
- Neil B.










Before
After
Before
After
Before
After