Your business’ apparel can encompasses much more than a black t-shirt with white lettering.
We are capable of giving you shirts, hats, hoodies and much more, in a style you’ll be proud to wear.


Shamrock Design House is your number one source for all things custom t shirts and screen printing in Yuba City and Marysville. We have been printing custom T-shirts for over 28 years. No matter what type of T-shirt, custom designs or screen printing needs you may have, we can handle it. If you're looking for something different, we handle that too. Dye sublimation, Direct to Garment printing (DTG), embroidery and now laser etching on apparel.


Shamrock Design House is an experienced hat embroidery manufacturer that provides full service embroidery needs. There are also other ways to customize hats. We are capable of screen printing, patches and now laser etching.


There is a lot to consider when getting custom printed hoodies. You need to know all the print methods available to you, be familiar with all the garments styles you can choose from and know how to pair these options to get an amazing product. It’s a lot to consider right? Well don’t worry we are here to help. Timing is everything for hoodies, call today.

Everything Else

We’re convinced that we’ve created and organized the a great catalog of blank garments for designing and printing. Whether you are looking to create an order of tank tops, button ups, towels or anything else, the most important part is selecting the best product possible for your project. Don't forget we can make custom safety gear as well, safety vests, shirts etc.

About Us

Shamrock Design House is a full service sign and design studio. We specialize in quality signs, creative design and excellent service. Our products and services include: large format digital printing, interior and exterior signage, graphic design, fine art prints, vehicle graphics and car wraps, trade show design and displays. Banners, illuminated signs, channel letters, light boxes, monument signs, stand-off wall displays, custom wall wraps, business cards, flyers, brochures, mousepads, notepads, and more…

What We Do

Using a blend of cohesive indoor and outdoor signage will pique the curiosity of motorists and passersby and entice them to see what products and services you offer. Having professionally made signage also provides you with the perfect opportunity to introduce your brand to your community and how your products and services will make their lives better.

However, with mediocre signs made by ordinary sign companies, your target audience will pass by, unaware as they go about their daily lives. You need to partner with a professional signage company who knows how to engage even the most distracted customer and entice them to see what you have to offer.

We can help you do just that! We have a proven track record of delivering effective, quality signage solutions to both big and small business owners, and we are eager to show you how our solutions will help you.


Yuba City Marysville Business Signs Truck Lettering Banners Web Design Business Card Printing Embroidery Screenprinting Screen Printing Promotional Items Pens Mugs Mousepads