Sando castles: SF's top 4 affordable lunch spots

If you need more sandwiches in your life, but you're not made of money, keep reading.

For your consideration, we've crunched the numbers to find the best-value, top-rated handheld meals in San Francisco using Yelp data and our own secret, tangy sauce* to produce a ranked list.

1. Saigon Sandwich (Tenderloin)

Photo: John k./Yelp

Topping the list is Saigon Sandwich.

Located at 560 Larkin St. (between Eddy and Turk streets), this bastion of banh mi is the most popular low-cost sandwich spot in San Francisco, boasting 4.5 stars out of 2,998 Yelp reviews.

Cash-only, Saigon Sandwich's $4 menu include the cha lua (pork pate), thit cha (steamed pork and roast pork) and xui mai (pork meatball).

2. Lou's Cafe (Inner Richmond)

| Photo: Yelp User/Yelp

The Inner Richmond's Lou's Cafe, located at 5017 Geary Blvd. (between 14th and 15th avenues), is another top choice, with Yelpers giving the budget-friendly spot serving coffee, sandwiches and salads 4.5 stars out of 1,381 reviews.

Yelpers praise the meat and cheese combinations served on fresh Dutch Crunch rolls, including the hot pastrami and chicken pesto. Lou's Cafe accepts credit cards and has TVs and free wifi.

3. Roli Roti Gourmet Rotisserie (Embarcadero)

| Photo: Yelp User/Yelp

Roli Roti Gourmet Rotisserie, serving sandwiches and specialty food at the foot of Market Street, is another inexpensive go-to, with 4.5 stars out of 1,363 Yelp reviews.

Reviewers call out the spot's rotisserie porchetta, a slow-roasted Italian-style pork sandwich with onion marmalade, served on deli rolls from Acme Bread Co.

Head over to the Ferry Building Marketplace (1 Ferry Building), or visit its food truck at one of its Bay Area locations.

4. Submarine Center (West Portal)

| Photo: Yelp User/Yelp

Finally, there's Submarine Center, a West Portal favorite with 4.5 stars out of 1,067 reviews. Stop by 820 Ulloa St. (between Claremont Boulevard and West Portal Avenue.) for sandwiches and pizza next time you're in the mood for cheap eats west of Twin Peaks.

Muni-adjacent, the neighborhood sandwich shop has limited seating, but is listed with most online delivery services. Subs come in three sizes, but a mini starts at $6.50.

* pickle relish, mustard and mayonnaise