San Diego's Premiere Provider for the Finest Quality Steel Windows & Doors

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San Diego Custom Steel Windows and Doors

When it comes to San Diego steel windows and doors, Portella should be your first call. Since 1999, we’ve gone above and beyond to provide our friends, neighbors, and loyal customers in the San Diego area with award-winning service and quality.

You won’t find a collection of steel windows and doors as expertly engineered as ours. 

How Businesses Custom Steel Windows & Doors Benefit San Diego

Benefits of Custom Steel Doors

One of the most important benefits of custom steel doors for businesses is that they are nearly indestructible. You can always depend on the security custom steel doors provide. 

Another benefit is that steel is the most durable material for doors. This means your door can sustain large, heavy items being moved in and out of the building. Commercial steel doors are a great option for oft-used entrances. 

Lastly, the high level of insulation of custom steel doors makes them energy-efficient. Portella’s steel doors feature a thermal coating to ensure maximum durability and tensile strength, which will keep your air conditioning and heating costs low.

The Thermal Window Difference

Thermal windows are a great cost-saving move for your home or business. Portella’s thermally broken steel windows with low e-glass are built with recycled material. They are designed to minimize the effects of UV rays, which will keep your home cool during the summer months. 

Thermal windows also reduce sound transfer, allowing you to enjoy the ambiance of a room with minimal noise from the outside. 

Portella Announces The Contemporary 3-D Metal Door

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Portella Product Lines

Storefront Interior & Storefront Exterior

San Diego businesses trust Portella’s Storefront Interior and Exterior lines to help transform their space into a stunning picture of professionalism. 

Our wide array of sleek and modern steel and glass door and window designs are perfect for large and small businesses projects on a tight budget.

Thermally Broken

Portella’s thermally broken windows combine the latest thermal technology with beautiful designs. The result is the most energy-efficient steel windows and doors offered in San Diego.


Achieve a minimalist yet timeless aesthetic with our range of metal frame doors. Portella’s classic designs integrate large expanses of glass to achieve the appearance that many architects and modern homeowners seek.

Portella's Superior Service Guarantee

When it’s time to replace your windows or doors, your friendly, knowledgeable Portella Project Manager is ready to assist you in finding custom steel door and window designs to meet your needs. Our manufacturing is custom-tailored around your design goals. 

Fashion and function are deftly interwoven to create unique, cutting-edge designs to beautify your home or business. 

From the initial quote process to the shop drawing mockups, you can rest assured that you’ll always be up to date on the status of your project. 

Clear and concise communication is a cornerstone of Portella, and we adhere to this standard each and every day.


Our steel doors and windows are built according to ASTM, NFRC, and AAMA specifications. By applying the highest standards in the industry to our craft, we provide our valued clients with the highest quality residential and commercial steel doors and windows in San Diego. 

Looking for a custom solution? No problem! There is a wide selection of pre-made options to choose from, and the Portella team can provide you with custom steel doors or windows to fit your needs.

Indulge in luxury with Portella’s stylishly engineered doors. Our custom steel sliding glass doors are both functional and sophisticated, elevating your space to the next level.

Our collection of expertly engineered, aesthetically pleasing commercial steel doors and windows means that there’s something for everyone!

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What Makes Us Different?

Our goal at Portella is simple: to provide the finest quality steel windows and doors in San Diego. Our expert craftsmen know the ins and outs of the trade better than anyone. They have proudly provided expertise and artistry to San Diego residents and businesses for over two decades.

Here’s what makes the Portella difference:

  • Built-to-order steel window and door designs by highly skilled craftsmen
  • 44,000 square feet of state-of-the-art manufacturing space
  • In-house transportation fleet
  • Steel doors and windows manufactured using a zinc-bonded galvanizing technique method with only 100% recyclable steel that you won’t find anywhere else
  • Exceeding expectations with certifications from the ASTM, NFRC, and AAMA

Contact us today to learn what the Portella difference means for your next steel window or door project!

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