Here is a list of all available housing interiors:
(Please be as realistic as possible to your requested location)

k4mb1_apa1_shell
Stories: 2
Size: Medium
Rooms: 2

k4mb1_apa2_shell
Stories: 2
Size: Medium
Rooms: 2

k4mb1_apa3_shell
Stories: 2
Size: Medium
Rooms: 2

k4mb1_biker3_shell
Stories: 1
Size: small
Rooms: 2

k4mb1_drug_shell
Stories: 1
Size: small
Rooms: 1

k4mb1_loft1_shell
Stories: 1
Size: small
Rooms: 1

k4mb1_loft2_shell
Stories: 1
Size: small 
Rooms: 1

k4mb1_loft3_shell
Stories: 2
Size: small
Rooms: 1

k4mb1_trap_shell
Stories: 1
Size: small
Rooms: 1

k4mb1_palhouse1_shell
Stories: 2
Size: Medium
Rooms: 3

k4mb1_hoodhousing1_shell
Stories: 1
Size: Small
Rooms: 1 

k4mb1_palhouse1_shell
Stories:2
Size: Medium
Rooms: 3

k4mb1_sandyhouse1_shell
Stories:1
Size: Small
Rooms:2 

kambi_emptyhouse1
Stories: 1
Size: Small
Rooms: 1

 k4mb1_basement1_shell
Stories:2
Size: Medium
Rooms: 1

k4mb1_basement2_shell
Stories:2
Size: Medium
Rooms: 1

k4mb1_basement3_shell
Stories:2
Size: Medium
Rooms: 1

k4mb1_basement4_shell
Stories:2
Size: Medium
Rooms: 1

k4mb1_basement5_shell
Stories:2
Size: Medium
Rooms: 1 

k4mb1_house1_shell
Stories:3
Size: Large
Rooms:4

k4mb1_house2_shell
Stories:2
Size: Large
Rooms:4

k4mb1_house3_shell
Stories:2
Size: Large
Rooms:3

k4mb1_house4_shell
Stories:2
Size: Large
Rooms:3

gunworkshop_k4mb1
Stories: 1
Size: Small
Rooms: 2

luxury_housing1_k4mb1
Stories: 1
Size: Small
Rooms: 1 

luxury_housing2_k4mb1
Stories: 1
Size: Small
Rooms: 1 

manor_housing1_k4mb1
Stories: 2
Size: Huge (For mansions only)
Rooms: 5

safehouse_k4mb1
Stories: 1
Size: Small
Rooms: 1

classichouse_shell
Stories: 2
Size: Medium
Rooms: 5 

classichouse2_shell
Stories: 2
Size: Medium
Rooms: 5

classichouse3_shell
Stories: 2
Size: Medium
Rooms: 5

k4_hotel_shell
Stories: 1
Size: Small
Rooms: 1 

k4_hotel2_shell
Stories: 1
Size: Small
Rooms: 1

k4_hotel3_shell
Stories: 1
Size: Small
Rooms: 1 

shell_lester
Stories: 1
Size: Small
Rooms: 1

shell_ranch
Stories: 1
Size: Medium
Rooms: 1

 

shell_trailer
Stories: 1
Size: Small
Rooms: 2 

shell_trevor
Stories: 1
Size: Small
Rooms: 2

shell_v16low
Stories: 1
Size: Small
Rooms: 1

shell_coke1
Stories: 1
Size: Medium
Rooms: 1

shell_v16mid
Stories: 1
Size: Small
Rooms: 1

shell_garagel
Stories: 1
Size: Medium
Rooms: 1

shell_garagem
Stories: 1
Size: Medium
Rooms: 1

shell_garages
Stories: 1
Size: Medium
Rooms: 1

shell_warehouse1
Stories: 1
Size: Medium
Rooms: 1

shell_warehouse2
Stories: 1
Size: Large
Rooms: 1

shell_warehouse3
Stories: 1
Size: Small
Rooms: 1

shell_highend
Stories: 1
Size: Medium
Rooms: 1

shell_michael
Stories: 1
Size: Large
Rooms: 3

 

shell_apartment1
Stories: 3
Size: Large
Rooms: 3

shell_apartment2
Stories: 3
Size: Large
Rooms: 3 

 

shell_apartment3
Stories: 2
Size: Large
Rooms: 2

k4_mansion_shell
Stories: 3
Size: Huge
Rooms: 4

k4_mansion2_shell
Stories: 3
Size: Huge
Rooms: 4

k4_mansion3_shell 
Stories: 3
Size: Huge
Rooms: 4

 

shell_frankaunt
Stories: 1
Size: Small
Rooms: 2

shell_medium2
Stories: 1
Size: Small
Rooms: 3

shell_medium3
Stories: 2
Size: Small
Rooms: 3

shell_banham
Stories: 2
Size: Medium
Rooms: 5

 

shell_westons
Stories: 2
Size: Huge
Rooms: 5

shell_westons2
Stories: 2
Size: Huge
Rooms: 5

default_housing1_k4mb1
Stories: 1
Size: Small
Rooms: 1

default_housing2_k4mb1
Stories: 1
Size: Medium
Rooms: 1

default_housing3_k4mb1
Stories: 1
Size: Small
Rooms: 1

default_housing4_k4mb1
Stories: 1
Size: Small
Rooms: 2

default_housing4_k4mb1
Stories: 1
Size: Small
Rooms: 1

deluxe_housing1_k4mb1
Stories: 2
Size: Medium
Rooms: 1

deluxe_housing2_k4mb1
Stories: 1
Size: Medium
Rooms: 2

deluxe_housing3_k4mb1
Stories: 2
Size: Large
Rooms: 3

highend_housing1_k4mb1
Stories: 3
Size: Large
Rooms: 3

highend_housing2_k4mb1
Stories: 3
Size: Large
Rooms: 3

highend_housing3_k4mb1
Stories: 2
Size: Large
Rooms: 3

medium_housing1_k4mb1
Stories: 1
Size: Small
Rooms: 2

medium_housing2_k4mb1
Stories: 1
Size: Small
Rooms: 3

vinewood_housing1_k4mb1
Stories: 3
Size: Huge
Rooms: 4

vinewood_housing2_k4mb1
Stories: 2
Size: Large
Rooms: 4

vinewood_housing3_k4mb1
Stories: 2
Size: Medium
Rooms: 2

modern_housing1_k4mb1
Stories: 2
Size: Huge
Rooms: 5

 

modern_housing2_k4mb1
Stories: 2
Size: Huge
Rooms: 5

modern_housing3_k4mb1
Stories: 2
Size: Medium
Rooms: 5