Shell

A shell building is a buydebug object, that serves as a large fixed-exterior that acts as shelter. In practice, they're used to give a complex yet aesthetical architecture look, that would otherwise be impossible to create. Because of their varying size, some come with a fixed height and are useful for alluding persistent size that is the interior.

Anything that's within a shell (an object, wall segment and flooring) can only be modified with RestrictBuildBuyInBuildings cheat enabled. However, creating a smaller interior and utilizing hidden room markers for outer halls is completely optional. All shell buildings are fixed with their own entrance doors.

Examples of these buildings include the pyramids and the dragon cave exterior in The Sims 3: World Adventures, penthouses and apartments in The Sims 3: Late Night and The Sims 4: City Living respectively, private and big show venues in The Sims 3: Showtime, and futuristic shells in The Sims 3: Into the Future. The Sims Mobile introduces various shell buildings for careers.

The Sims 3: World Adventures

Location	Shell's name	Image	Size	Available in buydebug	Notes
Abu Simbel (The Southern Beach)	Abu Simbel		46x34	Yes	Entrance shell with no back wall.
The Great Pyramid (Al Simhara Desert)	Pyramid - Large		128x128	Yes	Requires moveObjects on to place down.
• Pyramid of the Burning Sands (Al Simhara Desert) • Pyramid of the Wind (Al Simhara Desert) • Pyramid of the Sky (Sky Valley)	Pyramid - Small		80x80	Yes	Requires moveObjects on to place down.
The Great Sphinx (The Crossroads)	The Sphinx		75x27	Yes
The Dragon's Maw (10 West Dragon Hills, Shang Simla)	Dragon Cave		55x29 (1st floor)	Yes	Entrance shell with no back wall. The non-solid roofing is noticeably larger at 61x54.

The Sims 3: Late Night

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Skyscrapers are shell buildings that were shipped with The Sims 3: Late Night. They are "Shell buildings" and only offer one or two floors (such as the basement; some nicer penthouses have a second floor bedroom.) as a playable area for either residential penthouses or community lots, such as bars. This is the first time in the series that a skyscraper can be made without the use of cheats, though they were available as neighborhood decorations in The Sims 2: Nightlife and The Sims 2: Apartment Life. Skyscrapers can be placed in build mode, though, as with any rabbit hole, it has to be placed before a family moves in. Although many shells can be obtained from the buydebug catalog, some of them are unroutable due to broken door entrances.

Shells

Location (Bridgeport)	Image	Size	Design
The Prosper Room		22x22	Has a large yellow billboard on the top of the left wall, toward the front. Has a small red sign toward the bottom on the back wall. Has three more small sign on the back right corner, toward the bottom of the tower. Penthouse had outdoor balcony.
Eugi's		20x20	White-color tall, thin tower with floor-to-ceiling windows, giving a more modern feel, with a triple-level, flat-topped roof. Has a green billboard on the left side, and a curved orange sign above the door and on the top of the front.
The Simerset		30x18	Short, wide tower. Rather monotone, with the exception of some red canopy roofs over the ground floor windows.
Aquarius		30x18	Overall dark tone with a black-color canopy over the front door and "driveway" with black and white canvas roofs over the ground floor windows. The first floor is inside. The other 3 are above, allowing the player to build the upper floors—and roof—as they see fit.
The Tidewater		20x20	Has a greenish-color flat roof and decorative front door mantle/frame. The top floor is partially covered by the shell.
Veranda Villas		12x18	Rather odd shaped tall tower with a large base for the first two floors, which have a wrap-around deck on the second. Multiple floors have small concrete "balconies". Has a rather industrial-style look.
Bridgeport Armory		18x18	Dark brown concrete. Has a large blue billboard with red lettering on the back side. Only shell to have it's "penthouse" not on the top floor(s).
Bridgeport Sports Zone		30x18	Similar to the Aquarius, having canvas roofs over the ground-floor windows with the canopy over the front door. These are of a brown color. Has numerous small signs on the right side.
Plasma 501		22x22	White color tall building with blue canvas roofs over the ground-floor windows. Has two small yellow signs on the front-right corner at ground floor, a small red and white sign on the front-left corner, also at ground floor, and a larger blue and red billboard/sign on the front-right corner at the top of the tower.
The Brightmore		32x20	Has a billboard on the roof facing off of the back-left corner, orange canvas roofs over the ground floor windows, and a yellowish billboard of a Sim above the front door.

The fake rooms in question. The hot tub room in the lower right is to compare the fake rooms with a real interior room.

Some of the lower square buildings have decorative interiors rooms that can be seen through 1F windows, although if they are seen from very specific angles, the interior in question are shown to be fake.

The Sims 3: Showtime

Shell buildings are present in the expansion-introduced Starlight Shores world. However, not all of them are available in the build mode section of buydebug. Based of the examinations of modifying few of these buildings, all can possibly hold the maximum of five story height with a flat roof on top.

Location (Starlight Shores)	Lot	Image	Size	Available in buydebug	Notes
40 Los Sueños Strip	Brotherhood of Fine Fellows Hall (Metropolitan Building)		53x52	Yes
32 Los Sueños Strip	Hoi Polloi Event Center		57x58 (Circa)	No	Includes a theater rabbithole.
37 Los Sueños Strip	Los Sueños Private Club		45x38	Yes
21 Via Del Sol	The Binder Clips Center		57x59	No	Includes a stadium rabbithole.

The Sims 3: University Life

Location (Sims University)	Lot	Image	Size	Available in buydebug	Notes
110 Sims University	Conners Student Union Building		24x42	Yes
202 Sims University	Howard Memorial Library		28x47 (Estimated from appearance)	No

The Sims 3: Into the Future

Location (Oasis Landing)	Lot	Image	Size	Available in buydebug	Notes
109 Arid Avenue (Crash Site)	Crashed Ship Shell		22x17	Yes
361 Proclivity Promenade	EP-XI Imports Gallery		43x41	Yes
304 Emulation Blvd.	Nuts n' Bolts Bot Emporium		36x18	Yes
394 Emulation Blvd.	The Erutuf		40x30	Yes

The Sims 4: City Living

Skyscraper shell buildings return in The Sims 4: City Living. They are more often seen as high story apartment buildings and usually have one to four apartments in them, though some of the skyscrapers also have a penthouse on top. Some of the buildings are mostly one-story, but there couple that have two stories. These skyscrapers can not be moved, edited or placed into another world by the player and are only found in San Myshuno.

Apartment buildings in Arts Quarter.

The Sims Mobile

The Sims Mobile introduces various shell buildings for careers.

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