Blueprint Appreciation Post

Technical drawings are the thing that made this Hogwarts project possible, full stop. I don’t remember which of these was the correct order of events:

  1. I stumbled upon some blueprints online and thought, Wow, I could actually do a 3D model investigating the changes!
  2. I thought, Wow, I’d really like to do a 3D model investigating the changes! and subsequently found some blueprints online.

But either way, I don’t think I ever would have started this thing without some floor plans to guide me.


For the first film, I’ve got two different scans of a single plan of the miniature. One is a high-res B&W scan; the other has much lower resolution and a tighter crop, but it’s in color. Interestingly, their perspectives don’t match, suggesting that one or both of them may have actually originated as photos, not scans. But regardless, here I’ve tried to align them together, applying the low-res color data to the high-res scan. I’ve also rotated it (to match the plans for the other films) and corrected the perspective.

I have a few observations. First of all, this is evidently the fourth revision, dated January 14th, 2001, but there were likely other revisions after this. I say that because this plan is not completely accurate. Flaws I’ve noticed:

  • The Great Hall balcony has the wrong shape – the corners are square and it doesn’t wrap around the north side of the structure.
  • The training grounds tower doesn’t indicate the circle tower where it meets the Durham courtyard structures.
  • The quad interior has the wrong dimensions.
  • The walkway along the east side of the quad exterior appears to have a single level, and the elevation is marked as (I believe) 220′. This is the same level as the adjacent stone bridge. The final design for the first film moves the walkway lower down, with the part nearest the bridge even lower still. This also calls into question the accuracy of the area north of the quad, for which I sadly have no adequate photo reference.

Still, this is an absolutely invaluable look at the original castle.


Sadly, I have no floor plans for the miniature in the second or third films. I very much appreciate Warner Bros. posting these Prisoner of Azkaban elevations at the Studio Tour in London, though:

These cover many of the main changes to the castle in that film, and they were the reason I started my project with the Azkaban castle.


Goblet of Fire is an interesting one. I do have one partial floor plan, but the whole Great Hall/boathouse area is all wrong, as is the quad interior. I suspect that one wasn’t the final revision either.

As you can see, this consists of two scans or photos overlaid on top of each other. This composite I did not do – this is how the image was posted by user “decat” at the RPF.

This drawing provides evidence for the quad cloisters still existing in POA. Presumably, they were still part of that version, and at the time this drawing was created, they simply hadn’t yet decided to raise the quad, add the new arch, remove the cloister and fountain, etc. This is also the only plan I have of the training grounds tower from the COS redesign, and of the adjacent pathway that would eventually change in HBP.


I have no drawings of the miniature from OOTP. Fortunately, not much changed, and the changes that did occur will be easy enough to replicate with help from photogrammetry measurements.


The final HBP floor plan was actually released by Warner Bros. in the book Harry Potter: Page to Screen. It’s a two-page spread, which is wonderful for being able to read all the writing, but it does put an unfortunate seam right in the middle:

Still, it’s a fabulously detailed view of a critical production document and I’m grateful for it. I’m not aware of any inaccuracies here.

The same can almost be said of the earlier version on display at the Studio Tour:

The odd tapering crop is the result of perspective correction, since the original photo was taken at an angle. Note the lack of even the small HBP training grounds tower, the dotted outline of the old DADA tower to be removed, and the more detailed plan of the new astronomy tower.

If that’s not enough for you, though, don’t worry – when it comes to the astronomy tower, MTV News has your back! (Of all sites!)

I haven’t built the astronomy tower yet as of this writing, but this drawing is going to make it a cinch.


The main DH floor plan has also been officially released, albeit with some photo overlays that obscure some of the writing:

That film’s substantial changes are on full display here. The Fantastic Beasts castle is virtually identical; if they did create any drawings for that one, I haven’t seen them.


The real danger in studying these closely is that they refer to all the countless detail drawings that have not surfaced, and likely never will. Always leaves me feeling like the proverbial mouse for whom that cookie was simply not enough.

But ultimately, there’s a real beauty in all these drawings, even if I always find myself wanting more. I’m grateful to the deeply skilled drafters who brought these to life, and to the folks who’ve made them available to us fans!

8 thoughts on “Blueprint Appreciation Post

  1. I took photos of any blueprint I could see at the WB Studio Tour. I would be happy to send these over to you if you think it would be helpful, since I think at least some of the photos are better than anything I could find online.

    Liked by 1 person

  2. In regards to any inaccuracies in the HBP blueprint from ‘Page to Screen’, I’ve only been able to find one rather insignificant inaccuracy, being the way in which the Alnwick retaining wall meets the O1 and O2 training grounds towers and the stairs that go in between those towers (sorry about image weirdness, I’ve never posted a wordpress comment before so).

    Another interesting thing is that the blueprints indicate that the quidditch pitch was still on the training grounds side, whereas in the final film it was on the clock tower side of the owlery mountain. My guess is that the change was only accidental/half-thought-out with the background replacement in the HBP quidditch scene and that they carried it through to DH because they removed the training grounds in that film.

    Liked by 1 person

  3. I always love seeng these blueprints. I first took an interest in the Hogwarts changes when I wanted to have a basic map for a Harry Potter RPG I GM, and it kinda snowballed from there.

    Like

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