Hangman's alley. 
I have filled in the alley of this settlement with a building that extends the surrounding structures, as if the alley had never existed and was actually an office building from pre-war. 
This deserted building has then been taken over by settlers that have made it their own as well as adding some shack structures around it. 

There are workshop areas, a bar and general/armour/weapon/clothing stores, clinic, guard posts, housing, small indoor farming areas, and a central generator with full wiring around the settlement. 

Settlement stats for 18 people are: 
21 Food
20 Water 
100 Power 
18 Beds 
68 Defence 

This blueprint will add 1434 items to Hangman's alley. 

This has been exported with Transfer Settlements 1.93 and includes all the wiring. Send some love to CDante for getting this working as it makes complex settlements like this work straight away without you needing to do any work.
This will be installed in slot 10 of Transfer Settlements by default. 

It's recommended that you scrap/store everything within the settlement first and use the option to include "original items". Some of which I kept and moved, this will lead to you having overlapping copies of those items if you don't remove them first... 

This was built with access to all the DLC, and uses many mods to complete the structure and decorate it, which you will need if you want everything shown (see below for list). But you can still use this blueprint if you are missing any of the mods, you will just be missing those assets. 

My settlement walkthrough video can be seen here:
 

DLCs required: 
Wasteland Workshop 
Automatron 
Contraptions  
Far Harbour 
NukaWorld 
Vault Tec 

Mods required for full recreation (minus texture replacers):
Transfer Settlements by cdante (Including all the requirements for that mod), 
Homemaker by Nova Coru,  
Armor and Weapon Keywords Community Resource (AWKCR) by Gambit77 - Thirdstorm - Valdacil 
Half Width Shack Walls by CitizenRandom 
Settlement Objects Expansion Pack by ccmads 
G2M Workshop by g2mXagent and keppekinosha 
Pipe Galore by Ethreon
Compact crafting by fadingsignal 
Craftable Balcony Supports by DarthWayne 
Concrete walls with window glass by cartman1975 
Captain's Workshop Pack by Captain-Ultima
1x1 Craftable Foundation pieces by DDProductions83 
DDP AIO Standalone by ddproductions83 ("Cookiepocolypse" may work instead) 
Sandbag fortifications by Nutulator and Ethreon 
Snap 'n Build by ad3d0, 
Snappy HouseKit by robboten (and the Snappy_DLC03.esm) 
Auto Doors by Wenderer 
Box Houses by  Ethreon 
Window Floor and Roof Boards by Necrocytosis 
Minutemen Morale Pack by EvilViking13 
Thematic and Practical (including the DLC) by 5like 
CWSS Redux v2 by FLipdeezy (not currently available on the Nexus, I'm looking for alternatives for the future) 
OCDecorator by McFace, (Also requires the DLC version and dispenser). 
Old World Plaids by LupusYondergirl 
NorthlandDiggers Resources by ludvig08 
Eli's Craftable Flower Pots by Elianora (Has been included with Elianora's Fallout Junk Yard. Check the files.) 
Eli's Armour Compendium by Elianora 
Business Settlements by Tamayo831 
Better Cooking Stations by steve40 (not currently available on the Nexus)
OSHA Unapproved Safety Signage by BlandSauce 
Better Stores (with the farharbour esp) by blazeda59 (not currently available on the Nexus) 
FAC paintings by Foggypath 
Working Table Lamps by FrauZockinsky 
Desk Lamps of the Commonwealth (DLC) by User_564511 (not currently available on the Nexus) 
Do it Yourshelf by dinozaurz  (Plus the "extra Ammo"  and "retex" add-ons.) 
Vertical (wall-mounted) power conduits by Daedragon 
Warehouse Shelves for components and ammo by Cartman1975 
Zebrina's Workshop Devices by Zebrina 

Let me know if you find any problems with any of the mod links.

Check the mod page for Transfer Settlements for more information about how these blueprints work and for any issues with importing settlements. 

Thanks.