Commercial Window Replacement in Los Angeles
Landmark Construction handles commercial window replacement for buildings across Los Angeles, the San Fernando Valley, and Orange County. If your windows are leaking, drafty, fogged, or driving up your energy bills, we remove the old units and install energy-efficient replacement windows that meet California Title 24 requirements.. We also replace commercial windows and doors for offices, apartment buildings, storefronts, hotels, and industrial properties.
- Over a decade of construction and glazing experience
- FREE on-site window assessment
- Old window removal & replacement
- Scheduling around your tenants and business
- Warranty & support
Call or email us now for a FREE estimate!
Free Site Assessment
Fill out our quick form to schedule an on-site evaluation with our commercial glazing team. You can also reach our team directly at call us at (818) 319-4970
Commercial Window & Door Replacement Options
Our Commercial Window Replacement Process
1. Site assessment & window evaluation
We start with a free on-site inspection of your existing windows and doors, checking for seal failure, leaks, drafts, and damaged frames. We’ll tell you plainly whether replacement is needed or a repair will do, and we’ll go over your goals for energy savings, security, or appearance.
2. Measurements, product selection & permitting
We take precise measurements, help you choose the right glass and frame for your building, and handle the permits needed to meet Los Angeles building codes and Title 24 energy standards.
3. Removal & replacement
Our licensed crew removes your existing units and installs the new windows and doors, with attention to weatherproofing, sealing, and structural integrity. We schedule the work around your tenants and business operations, including evenings and weekends.
4. Final inspection & walkthrough
We inspect every replacement before we call the job finished, then walk you through the completed work to confirm it meets your expectations.
5. Warranty & support
Every replacement is backed by our 100% satisfaction guarantee, with ongoing support if any issues come up after the job.
100% SATISFACTION GUARANTEE
At Landmark Construction, we pride ourselves on being a top Los Angeles glass company. That’s why ALL of our projects are backed by a promise of satisfaction guaranteed. We are committed to doing whatever it takes to ensure you are thrilled with our work. That’s the Landmark guarantee!
What our clients say
Ready to Replace Your Commercial Windows?
Partner With LA’s Trusted Commercial Window Replacement Contractor
Old windows cost you money every month in lost heating, cooling, and tenant complaints. Landmark replaces them with energy-efficient glass that meets Title 24, so your building runs better and holds its value. Call or request your FREE, no-obligation estimate today.
FAQs
If your windows show widespread seal failures (foggy double-pane glass), severe frame deterioration, water leaks around perimeter seals, or high monthly HVAC costs, a full commercial window replacement is usually the most cost-effective long-term solution. However, if damage is limited to isolated cracked panes or minor weatherstripping wear, targeted commercial window repair may suffice. Our technicians perform an on-site audit to recommend the best path forward.
Modern energy efficient replacement windows feature advanced Low-E (low-emissivity) coatings, spectrally selective glass tints, and argon gas insulation between panes. These technologies block up to 99% of damaging UV rays and significantly restrict solar heat gain from entering your building. By keeping interior spaces cooler in the Southern California heat, you drastically lower daily HVAC loads and cut monthly utility expenses.
Yes. We specialize in low-impact, turnkey installations for active commercial environments, multi-tenant office buildings, and retail spaces. We coordinate stage-by-stage installation plans, use containment barriers to minimize dust and noise, and offer flexible off-hours, evening, or weekend scheduling so your business operations continue without interruption.
Project timelines depend on the total square footage, custom glass fabrication requirements, and building height/accessibility. Once custom units are fabricated, on-site installation typically ranges from a few days for single-story retail spaces to a few weeks for multi-story office buildings. We provide a detailed project schedule with precise milestone dates before work begins.
Landmark Construction proudly serves the entire Los Angeles area, including Beverly Hills, Santa Monica, Hollywood, DTLA, Glendale, the San Fernando Valley, and Orange County.
