Has a voice-over project on YouTube (here) and an audio only one by Shirekathere. There's also a Hungarian translation project titled A Szomszédlányok. (Scroll down. They have tropes!)
Actor Allusion: Javert at one point is "being John Malkovich"; Elizabeth is very weirded out by seeing Sweeney Todd and Legolas; Rorschach mistakes Raoul for Nite Owl.
Javert: "It is my belief that we could be facing a loss of all rationality, sense of right and wrong, as well as sensible narrative - we may fall prey to some form of mass hypnosis, leading to complete moral abandon & sexual debauchery."
Arson, Murder, and Jaywalking: On page 98, Rooftop CSI, "...by letting you away with kidnap, blackmail and loud music after 10PM..." (Javert doesn't actually list by name the last straw after this, but it's definitely falls in the Felony Misdemeanor category.)
Beyond the Impossible: The main reason Chihiro is the unofficial president of the Wibsy (Weirdo Boyfrend & Supernatural Stalker club) is that, using Christine's words, "It's hard to trump dating a river." While the others have at least human-shaped (a fae, a ghost and a vampire, amongst others; Christine with her murderous deformed psycho is the most normal of them all) boyfriends/stalkers, this is impossible by their standards. In her defense, the river was in the form of a human boy that looked her age at the time she fell for him.
Blue and Orange Morality: As a Fae, Jareth is technically outside of the standard morality spectrum, which is why Aziraphale and Crowley can't really do anything about his shenanigans when Sarah complains. Observing him with Heaven/Hell's tech only results in the ++CUCUMBER ERROR++ as well.
Sarah, for whatever reason, has a video copy of her movie.
Christine has mentioned the largely fan-reviled proposed sequel to ALW's musical.
Brick Joke: Back in comic #35, Sarah wrangles a promise from Erik to wake her up if she's ever found wandering towards a certain person's room in her sleep. 2 years and 93 comics later, she gets a rather rude awakening.
Children Are A Waste: Jadis thinks this, at least about her own. She even sent a Christmas card addressed to the "Despised waste of genes". She apparently also contemplated Offing the Offspring but decided against it because she likes to see him suffer.
Clucking Funny: As a Labyrinth fanfic random chickens appear naturally and also In-universe the characters found a lot of humor in Jareth's chicken phobia and the Chicken Coup that caused it. But as it turned out there was a goodreason for this. Yes. The chickens of the Labyrinth plot to take over the kingdom and maybe even the world.
Cuteness Proximity: Jareth uses his owl form as a means to get close to Sarah on occasion; when she doesn't react to the sad fluffy owl on her windowsill, he knows he's screwed up big time.
Cut His Heart Out with a Spoon: Here Jareth threatens Erik with magicking all the songs of Miley Cyrus into Christine's head if he doesn't let Sarah go. Later, he uses a rather elaborate threat about how he'll stop Webber before he makes the musical (leaving Erik with only his literary characterization). There are also frequent threats of bogging (being thrown "headfirst into the bog of eternal stench") from Jareth and Sarah.
Did You Just Scam Cthulhu?: Sarah made Jadis disappear by introducing her to Darkness so she manipulated two supernatural beings to get what she wants... it didn't work the way she intended but still worked.
Distracted by the Sexy: Christine when Beowulf appeared. Jareth several times ("Since when can you not tell blond from brunette, Jareth...?" "Ohh, silver lining.")
Dramatic Irony: Sarah has a crush on David Bowie, while Christine has a crush on Leonidas, but could very well have a crush on Gerard Butler. If you don't get the joke, look up the actors of their respective stalkers.
Almost Lampshaded when Christine thought it was weird that Sarah likes him, but couldn't understand why.
Dramatic Wind: Jareth likes to conjure one of these up now and then. Particularly when he's trying to convince Sarah to team up with him in a game of Risk.
The goblins also (correctly) identified it as giant naked chikin'!)
Everythings Squishier With Cephalopods: Christine found a watcher in the lake (according to Legolas) or maybe a young Kraken (according to James) or a mini-Cthulhu (according to Pika)... in her bathwater.
Finagle's Law: The Apartment has a fail field surrounding it, so anything that should be awesome... isn't. Like when Edward Cullen happened upon the Barbecue for Toby's birthday... (In trope terms: "The perversity of nature" is good friends with the Rule of Funny but has some serious grudge against the Rule of Drama and the Rule Of Cool).
Flat Joy: Sir. Dydimus' "Huzzah." on Ambrosius bringing back the talking hat.
I Have Boobs, You Must Obey!: One of Christine's favorite persuasion techniques is the cleavage squeeze. She also frequently combines it with Puppy-Dog Eyes for maximum effect. (As Sarah pointed it out this only works on guys.)
Insistent Terminology: Jareth (and fae in general) don't pout / sulk they Glower Ominously.
"[Aziraphael and Crowley are] having a long and convoluted debate about whether wiping his memories of today would be a good or a bad thing. If they come to the conclusion that it's a kindness, Azi will take care of it. If they decide it's wrong and deceitful, Crowley will."
The next time Raoul is subjected to this, Christine only comments on the potential health risks a second mind wipe may or may not cause.
Long Distance Relationship: Raoul/Christine. As stated, Christine lives in the "secret" university town where the apartment is and Raoul lives in Paris (with Arsčne Lupin).
May-December Romance: Played with as the characters lean on the Fourth Wall. Jareth is a fairy tale kind from... a long time ago. Sarah is in college... and was 15 in 1986, and had at least one date with Jacob Black, definitely a teenager.
Medium Awareness: Outside of the occasional bout of fourth wall breakage, the characters are seemingly aware they're in a humor comic, and will sometimes comment on it.
Erik's "plan" to thwart Jareth during the kidnapped Sarah arc. Said plan included the use of salt and deadly black chikins, of which Jareth is known to be very afraid.
Jareth's planned fight against Peter from Heroes for Sarah's love.
Mood Whiplash: Not quite as pronounced as Roommates, but it happens. See for example 211, which begins with a pretty intense discussion on why A Match Made In Stockholm really isn't a viable option and ends with Nanny Ogg smacking Jareth on the seat of his criminally tight pants.
The main difference is: GND uses this trope to ease drama with humor, while Roommates can whiplash in any way possible.
Mundane Luxury: Christine deeply appreciates 20th. century plumbing.
Never Wake Up A Sleepwalker: Erik advises Sarah not to wake Christine when she finds her sleepwalking toward his room for some late-night music lessons. Sarah dryly informs him that modern science has disproved that notion, then makes him promise to forget the potential trauma and just dump a bucket of cold water on her if he ever finds her sleepwalking toward Jareth's room. See Brick Joke for the follow-up.
Not Proven: Jareth's involvement in any shenanigans and pranks. Like here.
Sarah: "Gip, please tell the Goblin King that if I find hard evidence he is doing this he is so dead. And in the meantime he's to knock it off before I invite his Mother back here."
Not So Different: It's been noted how, for all her denial, Sarah seems to have developed quite a few similar characteristics to the Goblin King. Christine lampshades it by mentioning how well Sarah will fit in withJareth's family.
Of Corsets Sexy: Jareth catches Sarah while she's playing dress-up in Christine's undergarments. That particular comic page is a fan favorite, having spawned at least one fic on deviantART.
One of Us: Pika is an avid Troper, as shown on many of her artist's comments.
Otaku: It's rarely touched upon, but Erik likes anime. He once tried to get Christine to dress as Sailor Moon for Halloween. He also has shades of Basement Dweller, despite having an apartment on the third floor.
Overprotective Uncle: Sarah's uncle, Agent Phil Coulson, who assures her that he can arrange to have any boy who bothers her sent to Guantanamo (or a "magic-proofed pocket parallel dimension," if necessary) and makes a note to get her a set of tasers like Natasha uses. Pika even describes him as being "made of overprotective awesome to Sarah in contrast to her somewhat absent-minded, harried father."
Psychic Link: Jareth and Sarah share a mild mental connection made stronger in the Dreaming. Sarah is shown able to sense a simple wedding-fantasy, and something more complex (like say a would-be-sex dream) overrides her higher thought processes. Word Of God says this goes both ways.
Recursive Reality: The characters come from stories that were real for them but are fictional in the world of the comic (as are all of the people responsible). The comic is fictional in our world, and they know this. And it's implied that it's possible to read the comic in the comic. Is there a true reality? Does the chain of fictionality ever end? We don't know. You reading thiscould be fictional in some other world/story too.
Screaming Warrior: Sarah's battle style involves shouting random stuff while kicking ass. Mostly things that could insult / infuriate her opposition, like the names of chicken related food when fighting the dreaded chickin' revolutionaries here.
Word Of God is Sarah does have a soft spot for Christine/Erik, but is too good of a best friend to go mucking about in Christine's relationship business.
Take A Third Option: The 200th page speshul, quite literally. In the poll for this speshul The Box and The Prom Pictures options won, but the characters didn't want either... so they so counted on the readers being distracted by fanservice. (Which "accidentally" was the 3rd most chosen poll option.)
Tangled Family Tree: Jareth's inexplicable relation to pretty much every magical blond in fiction (Jadis is his mom, Nuada is his nephew, Howl is his great great great great grand-nephew once removed...) is something of a Running Gag. This comes from Roommates. In the Buildingverse every magical being is related somehow, not just the blonds.
Tempting Fate: Sarah actually invokes the trope so it'll be subverted when she decides to rummage 'round Jareth's room, since doing so makes it predictable and thus not funny. It doesn't work.
Terrible Interviewees Montage: The Monster Hunter Interview pages. The applicants range from Ash (perfectly hopeless) to Harry Dresden (too destructive) and seem to end with Beowulf (too late).
Time Skip: Magically from the inside, even if just a little. Jareth thought that pages 198-199 had too little fanservice, so we can very well skip right to 200. (Yes. This means that the comic doesn't have pages 198-199, and even #197 turns into an error messagenote 19seeeev777.81191WTFfff++CUCUMBER ERROR++.)
Weirdness Censor: The official answer to why the muggles don't notice all the weirdness is because Aziraphale & Crowley keep up a SEPnote "someone else's problem" field around the building. Which apparently doesn't stop some muggles to date or run away from the resident weirdness.
Where The Hell Is Springfield: Used to Hand Wave the issue of time differences during the Paris arc; since nobody is entirely sure where the Building and its environs actually are in relation to France, no sense in worrying they might be calling during the middle of the night there....
Why Did It Have to Be Snakes?: Jareth is scared of black chikins. This is apparently the result of an attempted coup made by the smarter ones in his kingdom. He doesn't appreciate the humor the rest of the cast finds in it.
What the Hell, Hero?: Christine to Erik, after he kidnapped Sarah to force her hand in their pre-character development relationship.
With Friends Like These: Everybody, but especially Jareth and Erik, who co-exist in a state of open warfare punctuated by occasional bouts of empathizing with each other's relationship drama.
World of Snark: It's easier to count the non-snarky characters: Luna, and arguably Legolas.
The youtube voiceover project provides examples of:
Limited Animation: Very very limited... you could swear it's just static images with an occasional effect or zoom.
It isn't?
It is, but if someone would do some mouth animation it would be actually hard to tell as thanks to the dynamic editing looks more alive than some actual cartoons from the 70s-80s.
Vocal Evolution: As the cast is mostly non-professional it's not surprising that they get better and better as time goes by.
The Hungarian translation provides examples of:
Gratuitous English: Some of the English is left unchanged. Mostly advertisement taglines and names of places (with subtitles if needed).