Wikia

Description

“	"Compact Houses are the only buildings that produce coins. They are found under the Resources Tab in the Shop."	”
	— general description

Tips:

You should have enough storage to store the accumulated coins. You can get more storage by buying and upgrading banks to the max 10th level.
Compact houses generate Coins over time, and will stop doing so when their coin capacity gets full. A high-level Compact house generates more money, at a faster rate and has more coin capacity, but it needs a lot of time before it's full.
Compact houses will keep generating coins when destroyed. So be thankful for the player who destroys them right after you logged out for sleep, because that is a safeguard to you gaining the maximum amount of coins after coming back ;).
Level 10 compact house will give up to 200,000 coins upon the final destruction, which wasn't looted during the tearing down of the structure if it happens to be completely filled with coins.
A low-level Compact House generates less Coins, but maximizes it's storage quicker.
The ancestor's house seems to be a level 1 Compact House
It takes more time to build and upgrade than a Mine.
Compact houses generate more experience revenue and the war points revenue is higher then mines. A compact house can generate more then 1 war point each when the attacker's planet/ colony star base is lower to much lower in level. Player's level are not affecting this outcome. Best target for high amount of war points remains the Warp Gate.
Compact houses at high level are effective protection against enemy invasion when trying to keep turrets from falling quickly. Using them as a shielding wall is a widely used strategy to keep enemies occupied for as long as possible.
There was an update recently where the level 10 Compact House gained some balconies.
It's upgrade lasts longer than Mines, so be patient and think if you will upgrade this one.
In higher level players compact house are use to protect defense because of their high health.
in lower level players compact houses are often protected by LOTS of turrets so if you are attacking a low level watch out in attacking this

Traducción al Español
Descripción Las Casas compactas son los únicos edificios que producen monedas . Ellos se encuentran bajo la pestaña de recursos en la tienda. Nota que tu deberías tener suficiente capacidad de almacenamiento para guardar las monedas acumuladas. Las casas compactas generan dinero siempre, y pararán de hacerlo cuando su capacidad llegue al límite. Una casa compacta de nivel alto genera más dinero, a un ritmo más rápido y tiene más capacidad de monedas, pero necesita mucho tiempo para que se llene. Una casa compacta de nivel bajo genera menos dinero, pero está lista muy rápido. Para más detalles, observa la tabla siguiente.

Expansions

To see detailed info on how to unlock each level, and the total amount of buildings per level visit: Building Level Unlocks at Star Base's Page.

Levels
Level 1	22s	360	750	6	360	1h	1	1
Level 2	7m 30s	760	1,500	11	990	1h 30m	4	1
Level 3	30m	1,580	2,400	20	2,700	2h 15m	9	1
Level 4	1h 30m	3,340	6,000	31	6,510	3h 30m	22	1
Level 5	3h	6,980	12,000	46	13,800	5h	44	2
Level 6	7h 30m	14,700	24,000	62	27,900	7h 30m	103	5
Level 7	18h	30,900	45,000	81	55,980	11h 30m	236	9
Level 8	1d 12h	64,880	65,000	103	105,060	17h	479	18
Level 9	3d	136,280	105,000	128	197,760	25h 45m	974	36
Level 10	4d 12h	287,560	165,000	156	360,360	38h 30m	1,676	75