House Flooring
There are 24 styles of flooring you can use to decorate your farmhouse floor. To change your house floor style, go to your Storage Box, select the option to change your interior design, and then select the Flooring option. You can preview the flooring before placing it under foot. The design can be used as many times as you'd like. Changing the floor covering also changes the rugs that are laid out underneath your table and chairs, by the bath and toilet rooms, and the table and sofa set.
Before you can place a flooring, you need to have the blueprint and craft the flooring using your workshop.

Simple Floor
Default flooring

Mosaic
Rebecca's Shop, 1600 G
Fall of year 1 or later
25 Small Lumber, 5 Yarn Ball, 10 Lavender

Square Wood
Rebecca's Shop, 1600 G
Winter of year 1 or later
25 Small Lumber, 5 Yarn Ball, 10 Moondrop Flower

Red Flooring
Rebecca's Shop, 3200 G
Summer of year 2 or later
15 Lumber, 5 Suffolk Yarn Ball, 10 Mint, 5 Copper

Green Flooring
Rebecca's Shop, 3200 G
Summer of year 2 or later
15 Lumber, 5 Suffolk Yarn Ball, 7 Cacao, 5 Jade

Purple Flooring
Rebecca's Shop, 3200 G
Summer of year 2 or later
15 Lumber, 5 Suffolk Yarn Ball, 10 Lavender, 5 Orichalcum

Red Diamond
Rebecca's Shop, 3200 G
Winter of year 2 or later
10 Material Stone, 5 Yarn Ball, 5 Brown Alpaca Yarn, 5 Copper

Yellow Diamond
Rebecca's Shop, 3200 G
Winter of year 2 or later
10 Material Stone, 5 Alpaca Yarn, 10 Mint, 5 Topaz

Blue Diamond
Rebecca's Shop, 3200 G
Winter of year 2 or later
10 Material Stone, 5 Alpaca Yarn, 5 Purple Cloth, 5 Orichalcum

Green Diamond
Mining, Group 2
Spring of year 2 or later
10 Material Stone, 5 Cotton Fabric, 10 Moondrop Flower, 5 Emerald

Grey Diamond
Mining, Group 2
Spring of year 2 or later
10 Material Stone, 5 Cotton Fabric, 10 Rosemary, 5 Platinum

Brown Diamond
Fishing, Group 3
Any year
10 Material Stone, 5 Cotton Fabric, 7 Cacao, 5 Sandrose

Blue Pattern
Fishing, Group 4
Any year
10 Material Stone, 5 Alpaca Yarn Ball, 10 Sunflower, 5 Adamantite

Yellow Pattern
Mining, Group 1
Spring of year 2 or later
10 Material Stone, 5 Yarn Ball, 5 Alpaca Yarn Ball, 5 Topaz

White Pattern
Received from Sanjay
15,000 FP or more and own the Sunflower Flowerbed, Red Rose Flowerbed, and Hydrangea Flowerbed blueprints
10 Material Stone, 5 Alpaca Yarn Ball, 5 Purple Cloth, 5 Mithril

White Marble
Sandra's Exchange Shop
1 Raclette @ 1 star, 1 Kimchi @ 1 star, 1 Summer Herb Tea @ 1 star
10 Material Stone, 5 Yarn Ball, 5 Llama Yarn Ball, 5 Mithril

Black Marble
Sandra's Exchange Shop
1 Chop Suey @ 1 star, 1 Mimosa Salad @ 1 star, 1 Watermelon Juice @ 1 star
10 Material Stone, 5 Llama Yarn Ball, 10 Gerbera, 5 Glittering Stone

Lavender Marble
Sandra's Exchange Shop
1 Mixed Vegetable Rice @ 1 star, 1 Pumpkin Salad @ 1 star, 1 Kiwi Juice @ 1 star
10 Material Stone, 5 Llama Yarn Ball, 7 Iron, 5 Agate

Blue Rug
Receive from Olivia
20,000 FP or more and own the Wagon blueprint
10 Black Material Stone, 5 Linen, 10 Mint, 5 Orichalcum

Yellow Rug
Receive from Olivia
20,000 FP or more and own the Wagon blueprint
10 Black Material Stone, 5 Linen, 3 Sandrose, 5 Topaz

Purple Rug
Receive from Olivia
20,000 FP or more and own the Wagon blueprint
10 Black Material Stone, 5 Linen, 3 Glittering Stone, 5 Amethyst

Royal Wood
Fish Trapping, Group 4
After game credits
20 Black Lumber, 10 Great Alpaca Yarn, 5 Llama Yarn

Tatami
Sandra's Exchange Shop
2 Dry Curry @ 1 star, 1 Cucumber Namul @ 1 star, 1 Summer Milk Tea @ 1 star
5 Great Alpaca Yarn, 5 Pine Branch, 25 Rice Stalk

Forest Green
Use Royal Jelly on the Honey Tree, Group 2
After game ending
15 Black Material Stone, 5 Llama Yarn Ball, 3 Peridot, 15 Sage, 30 Walnut