Okna Windows


Advanced, Customizable uPVC Replacement Windows to Save Energy & Upgrade Style

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Only the Best Brands & Quality Workmanship

If you're looking to replace windows in the Brooklyn, NY area, you've come to the right place. Contact us today for a free window replacement quote.

(718) 769-4555

TopLine’s Replacement Windows

The quality of different windows, the various material types and styles on the market today give you a wide selection to choose from. With so many options, the process of shopping for new windows could become overwhelming. However, finding the right windows and a trusted installation partner will make the process simple and worthwhile.

TopLine has over 40 years’ experience in replacing windows. We proudly offer Okna, the most exceptional replacement window brand in the country, for homes throughout Brooklyn, Staten Island and Queens. From upgrading the appearance of a property to lowering heating and cooling costs, our replacement windows offer a beautiful, energy saving and affordable solution.

Okna windows are ultra-energy efficient, easy to clean, durable and will operate smoothly year after year. They come with a variety of customizable features for you to personalize the exact look you want for your home. You can rest easy knowing the whole window and installation you receive from TopLine are backed by a comprehensive, lifetime transferable warranty. We take pride in offering our customers a quality replacement window and installation that are not only affordable but more than meet their expectations while delivering maximum value for their window investment.

Guaranteed Expert Installation

Even windows of the best quality will underperform if not installed correctly. Improper installation can cause the loss of heat, cracked joints, as well as the infiltration of air and moisture which can cause damage to both the window and the overall structure of a home. Given this, a window is only as good as the company that’s installing it. That’s why our professional window installers are factory trained and certified and are held to the highest standards throughout each project. From proper sizing and alignment to using the highest-quality materials when sealing, our quick and clean installation is detail oriented and done right the first time so your new windows will perform as advertised for decades to come.

TopLine Home Improvement will beat ANY Okna windows written estimate from a licensed and insured competitor and offer free estimates with no obligation. 

nfrcEnergy Star 2023Keystone

Improve the efficiency, comfort and views of your home all year round. Request a hassle-free window estimate today!


Learn about upgrading your home’s efficiency and style with new replacement windows! Request a no-pressure and informative window estimate.