SimCity BuildIt - Commercial Build Times

All of the commercial buildings can be upgraded to decrease the build times. The upgrades come in three steps: a 10%, 15% and 20% decrease. I've documented all of the upgrade costs and build times in the tables below.

These upgrades will benefit the players that keep their commercial buildings busy 24/7. In my opinion, the Farmer's Market, Building Supplies, and the Hardware Store are the three that benefit you the most.

	10%	15%	20%	Total
Upgrade Costs	1 Star	2 Star	3 Star	Cost
Building Supplies	12,000	24,000	32,000	68,000
Hardware Store	15,000	27,000	35,000	77,000
Farmer's Market	19,000	31,000	39,000	89,000
Furniture Store	21,000	33,000	41,000	95,000
Gardening Supplies	25,000	37,000	45,000	107,000
Donut Shop	29,000	41,000	49,000	119,000
Fast Food Restaurant	36,000	48,000	56,000	140,000
Home Appliances	40,000	52,000	60,000	152,000
Fashion Store	30,000	42,000	50,000	122,000

Building Supplies Store	Default	10%	15%	20%
Nails	5 min	4 min 30s	4 min 15 s	4 min
Planks	30 min	27 min	25 min 30 s	24 min
Bricks	20 min	18 min	17 min	16 min
Cement	50 min	45 min	42 min 30 s	40 min
Glue	60 min	54 min	51 min	48 min
Paint	60 min	54 min	51 min	48 min
Hardware Store	Default	10%	15%	20%
Hammer	14 min	12 min 36 s	11 min 54 s	11 min 12 s
Measuring Tape	20 min	18 min	17 min	16 min
Shovel	30 min	27 min	25 min 30 s	24 min
Cooking Utensils	45 min	40 min 30 s	38 min 15 s	36 min
Ladder	60 min	54 min	51 min	48 min
Drill	2 hrs	1 hr 48 min	1 hr 42 min	1 hr 36 min
Farmers Market	Default	10%	15%	20%
Vegetables	20 min	18 min	17 min	16 min
Flour Bag	30 min	27 min	25 min 30 s	24 min
Fruit & Berries	1 hr 30 min	1 hr 21 min	1 hr 16 min	1 hr 12 min
Cream	1 hr 15 min	1 hr 7 min	1 hr 3 min	1 hr
Corn	60 min	54 min	51 min	48 min
Cheese	1 hr 45 min	1 hr 34 min	1 hr 29 min	1 hr 24 min
Beef	2 hrs 30 min	2 hr 15 min	2 hr 7 min	2 hrs
Furniture Store	Default	10%	15%	20%
Chairs	20 min	18 min	17 min	16 min
Tables	30 min	27 min	25 min 30 s	24 min
Home Textiles	1 hr 15 min	1 hr 7 min	1 hr 3 min	1 hr
Cupboard	45 min	40 min 30s	38 min 15 s	36 min
Couch	2 hr 30 min	2 hr 15 min	2 hr 7 min	2 hrs
Gardening Supplies	Default	10%	15%	20%
Grass	30 min	27 min	25 min 30 s	24 min
Tree Saplings	1 hr 30 min	1 hr 21 min	1 hr 16 min	1 hr 12 min
Garden Furniture	2 hr 15 min	2 hr 1 min	1 hr 54 min	1 hr 48 min
Fire Pit	4 hr	3 hr 36 min	3 hr 24 min	3 hr 12 min
Lawn Mower	2 hrs	1 hr 48 min	1 hr 42 min	1 hr 36 min
Garden Gnomes	1 hr 30 min	1 hr 21 min	1 hr 16 min	1 hr 12 min
Donut Shop	Default	10%	15%	20%
Donuts	45 min	40 min 30s	38 min 15 s	36 min
Green Smoothie	30 min	27 min	25 min 30 s	24 min
Bread Roll	1 hr	54 min	51 min	48 min
Cherry Cheesecake	1 hr 30 min	1 hr 21 min	1 hr 16 min	1 hr 12 min
Frozen Yogurt.	4 hr	3 hr 36 min	3 hr 24 min	3 hr 12 min
Coffee	1 hr	54 min	51 min	48 min
Fashion Store	Default	10%	15%	20%
Cap	1 hr	54 min	51 min	48 min
Shoes	1 hr 15 min	1 hr 7 min	1 hr 3 min	1 hr
Watch	1 hr 30 min	1 hr 21 min	1 hr 16 min	1 hr 12 min
Business Suits	3 hr 30 min	3 hr 9 min	2 hr 58 min	2 hr 48 min
Backpack	2 hr 30 min	2 hr 15 min	2 hr 7 min	2 hr
Fast Food Restaurant	Default	10%	15%	20%
Ice Cream Sandwich	14 min	12 min 36 s	11 min 54 s	11 min 12 s
Pizza	24 min	21 min 36 s	20 min 24 s	19 min 12 s
Burgers	35 min	31 min 30 s	29 min 45 s	28 min
Cheese Fries	20 min	18 min	17 min	16 min
Lemonade Bottle	1 hr	54 min	51 min	48 min
Popcorn	30 min	27 min	25 min 30 s	24 min
Home Appliances	Default	10%	15%	20%
BBQ Grill	2 hr 45 min	2 hr 28 min	2 hr 20 min	2 hr 12 min
Refridgerator	3 hr 30 min	3 hr 9 min	2 hr 58 min	2 hr 48 min
Lighting System	1 hr 45 min	1 hr 34 min	1 hr 29 min	1 hr 24 min
TV	2 hr 30 min	2 hr 15 min	2 hr 7 min	2 hr
Microwave Oven	2 hrs	1 hr 48 min	1 hr 42 min	1 hr 36 min