We provide quality Windows and Doors Los Angeles homeowners and commercial building can get for their buildings. Landmark Construction & Development Group Inc has been a premier windows and doors contractor for over 10 years. One of the most effective ways to save thousands of energy dollars, improve your homes carbon footprint, and instantly enhance your home inside and out is by replacing the windows and doors in your home. Landmark Construction & Development Group Inc is happy to come in for a free, no-obligation consultation to show you the latest energy efficient windows or doors and incredibly beautiful door and window replacement options that are available to you. In our Southern California climate, any home over 25 years old is at a disadvantage in terms of insulation ratings, and that’s especially true of windows and doors. It’s virtually guaranteed that you’re losing valuable air conditioning dollars through leaks and cracks around doors and windows installed more than 20 to 25 years ago. Prior to 1995, there wasn’t nearly the selection of insulating glass and materials that we have now in the newest styles of windows and doors. The cost of replacing outdated doors or windows is far more reasonable than people often think, and you may have incentives or rebates available to help with the cost. This is why Landmark Construction & Development Group Inc works to stay on the cutting edge of materials, resources and building practices. We continue to train our craftsmen and technicians, and work to keep abreast of new technology, equipment, materials, and resources – so we can offer our customers the finest construction installation services in the Los Angeles area.