Housing steps and requirements in Caesar 3

Question

In Caesar 3, you need to provide new services for a house to evolve, from small tents all the way up to luxury palace.

What are each steps with the corresponding required service?

Answer 1

Source: Appian Way (Wayback machine copy of defunct website)

Housing levels with required services:

Housing Level	Desirab.	Entert.	Services	Goods
Small Tent	-99	0	None!
Large Tent	-10	0	Water
Small Shack	-5	0		1 Food Type
Large Shack	0	0	Temple to 1 God
Small Hovel	4	0	Clean Water 4
Large Hovel	8	10
Small Casa	12	10	School or Library
Large Casa	16	10	Baths	Pottery
Small Insulae	20	25
Medium Insulae	25	25	Doctor or Hospital	Furniture
Large Insulae	32	25	School & Library Barber	Oil
Grand Insulae	40	35		2nd Food Type
Small Villa	48	35	Temples to 2 Gods	Wine
Medium Villa	53	40	Doctor & Hospital
Large Villa	58	45	Academy
Grand Villa	63	50	Temples to 3 Gods	3rd Food Type
Small Palace	68	55		2 Types of Wine
Medium Palace	74	60
Large Palace	80	70	Hippodrome
Luxury Palace	90	80	All of them!	Everything!

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Housing levels with population, prosperity factor, and tax multiplier.

(for details, refer to the original website)

Housing Level	Size	Population	Prosp Factor	Tax Mult
Small Tent	1x1	5	5	1
Large tent	1x1	7	10	1
Small Shack	1x1	9	15	1
Large Shack	1x1	11	20	1
Small Hovel	1x1	13	25	2
Large Hovel	1x1	15	30	2
Small Casa	1x1	17	35	2
Large Casa	1x1	19	45	2
Small Insulae	1x1	19	50	3
Medium Insulae	1x1	20	58	3
Large Insulae	2x2	84	65	3
Grand Insulae	2x2	84	80	4
Small Villa	2x2	40	150	9
Medium Villa	2x2	42	180	10
Large Villa	3x3	90	400	11
Grand Villa	3x3	100	600	11
Small Palace	3x3	106	700	12
Medium Palace	3x3	112	900	12
Large Palace	4x4	190	1500	15
Luxury Palace	4x4	200	1750	16

Answer 2

A more detailed info in a single table can be found here. For posterity it's copied below (the last four columns are about Desirability):

Housing Levels

Level	Housing	Size	Pop.	Requirements	Prosp. Rating	Entert. Required	Tax Mult.	Crime	Effect	Range	Devolve	Evolve
0	Vacant Lot	1x1	0	Road access	0	-	-	-	0	0	-	-

Plebeians: working citizens

Level	Housing	Size	Pop.	Requirements	Prosp. Rating	Entert. Required	Tax Mult.	Crime	Effect	Range	Devolve	Evolve
1	Small Tent	1x1 2x2	5/20	Immigrants	5	0	1	25+3	-3	3	-99	-10
2	Large Tent	1x1 2x2	7/28	Well or Fountain	10	0	1	25+3	-3	3	-12	-5
3	Small Shack	1x1 2x2	9/36	1 type of food	15	0	1	25+3	-2	2	-7	0
4	Large Shack	1x1 2x2	11/44	1 god	20	0	1	25+3	-2	2	-2	4
5	Small Hovel	1x1 2x2	13/52	Fountain	25	0	2	22+3	-2	2	2	8
6	Large Hovel	1x1 2x2	15/60	1 entertainment	30	10	2	22+3	-2	2	6	12
7	Small Casa	1x1 2x2	17/68	School or Library	35	10	2	17+2	-1	1	10	16
8	Large Casa	1x1 2x2	19/76	Baths, pottery	45	10	2	17+2	-1	1	14	20
9	Small Insulae	1x1 2x2	19/76	2 entertainments	50	25	3	17+2	0	0	18	25
10	Medium Insulae	1x1 2x2	20/80	Doctor or Hospital, furniture	58	25	3	17+2	0	0	22	32
11	Large Insulae	2x2	84	School and Library, Barber, oil	65	25	3	12+2	0	0	29	40
12	Grand Insulae	2x2	84	2 types of food, 3 entertainments	80	35	4	12+2	0	0	37	48

Patricians: paying citizens

Level	Housing	Size	Pop.	Requirements	Prosp. Rating	Entert. Required	Tax Mult.	Crime	Effect	Range	Devolve	Evolve
13	Small Villa	2x2	40	2 gods, wine	150	35	9	8+1	+1	2	45	53
14	Medium Villa	2x2	42	Doctor and Hospital	180	40	10	8+1	+1	2	50	58
15	Large Villa	3x3	90	Academy	400	45	11	8+1	+2	2	55	63
16	Grand Villa	3x3	100	3 types of food, 3 gods	600	50	11	8+1	+2	2	60	68
17	Small Palace	3x3	106	2 types of wine	700	55	12	5+1	+3	6	65	74
18	Medium Palace	3x3	112	4 gods	900	60	12	5+1	+3	6	70	80
19	Large Palace	4x4	190	Hippodrome	1500	70	15	5+1	+4	6	76	90
20	Luxury Palace	4x4	200	everything	1750	80	16	5+1	+4	6	85	100