Knit the City Building Blocks: The Complete Guide to London’s Most Colorful Yarn Bombing Collective
There is something quietly radical about a knitted lamppost. Standing on a grey London street corner, wound in vivid stripes of wool, it announces itself not with noise or protest signs but with sheer improbable cheerfulness. That is the spirit at the heart of Knit the City, the world’s first knitted-graffiti collective to make its home in London, and it is the spirit that runs through every page of their extraordinary book, Building Blocks.
If you have ever stumbled across an unexpected splash of yarn in a public space — a tree trunk wrapped in rainbow cabling, a statue draped in a tiny hand-knitted cardigan, a park bench cocooned in intricate lacework — you may already owe a quiet debt to Knit the City. This collective has spent years transforming the overlooked corners of the British capital into open-air galleries, and Building Blocks is their testament: part how-to guide, part cultural history, part love letter to the city they have stitched into colour.
This guide is for anyone who wants to understand what the book contains, why it matters, and how you can use it to take your own knitting — or your own sense of civic mischief — to the next level.
What Is Knit the City?
Knit the City was founded in 2009 by a group of crafters who shared both a passion for knitting and a deep frustration with the idea that handcraft belonged only indoors, in private, producing practical objects. Inspired by the broader international yarn-bombing movement — which had roots in cities like Houston, Texas, where artist Magda Sayeg began wrapping public objects in knitting as early as 2005 — Knit the City took the concept and gave it a distinctly British, distinctly literary, distinctly London flavour.
Their early pieces were quietly placed overnight, discovered by morning commuters who did a double take on their way to the Tube. A knitted web stretched between the columns outside the British Museum. Tiny crocheted characters perched on the railings of Trafalgar Square. Scenes from classic English literature, rendered in wool, appearing without warning on famous statues.
The collective quickly developed a reputation not just for the scale of their installations but for their wit, their storytelling, and their extraordinary technical skill. These were not scarf-length rectangles of garter stitch hurled over a railing. These were meticulously planned, collaboratively executed, highly detailed works of public art that happened to be made of yarn.
Building Blocks: An Overview
Building Blocks is the book that grew from all of that experience. It is organised around the metaphor embedded in its title: the idea that every ambitious creative project, every sprawling yarn installation, every collective endeavour, is made possible by mastering and combining individual foundational elements — the building blocks of craft.
The book works on two levels simultaneously. On one level, it is a practical knitting and crochet reference. It covers the fundamental techniques that underpin everything Knit the City has ever made, presented with clarity and warmth, aimed at crafters who are ready to move beyond basic scarves and hats and into more adventurous territory. On another level, it is a celebration of what happens when craft is taken outside — outside the home, outside conventional galleries, outside the comfortable idea that making things with your hands is purely a private hobby.
These two levels reinforce each other beautifully throughout the book. The technical content is never dry because it is always anchored to real projects, real stories, real streets. The storytelling is never indulgent because it is always grounded in specific, learnable skills.
The Techniques Inside Building Blocks
For crafters, the heart of the book is its technical content, and it is generous. Knit the City has always been a collective that combines knitting and crochet, often within the same installation, and Building Blocks reflects that dual focus.
Knitting Foundations
The knitting sections cover a broad range of skills that progress logically from accessible to adventurous. Readers are walked through casting on and off using multiple methods, the mechanics of working in the round (essential for anything that needs to wrap around a cylindrical lamppost or tree trunk), and the basics of reading and adapting patterns.
But the book goes further than most beginner-to-intermediate references. There are detailed explorations of colourwork techniques — specifically the kind of stranded colourwork and intarsia that makes it possible to knit complex imagery, recognisable scenes, or elaborate geometric patterns into a piece. For anyone who has ever wanted to knit a scene from Alice in Wonderland or a panorama of the London skyline in miniature (and yes, Knit the City has done both), these sections are where the magic begins.
Texture is equally well covered. The book explains how different stitch patterns create different surfaces — how moss stitch produces something organic and slightly rough, how cables create sculptural ridges, how lace opens a fabric up into something almost transparent. For outdoor installations, where texture and visual impact from a distance are crucial, this knowledge is not decorative. It is structural.
Crochet Foundations
The crochet content is equally thorough and is treated as a genuine parallel discipline rather than an afterthought. Knit the City has always used crochet for specific purposes — it is often better suited to creating three-dimensional sculptural elements, joining pieces together, or adding fine detail to the edges of larger knitted sections.
The book covers the full range of basic crochet stitches, explains how tension and hook size affect the finished fabric, and moves into more complex territory including Tunisian crochet (which produces a fabric that looks almost woven), freeform crochet (working without a fixed pattern to create organic, irregular shapes), and the techniques used to create the tiny amigurumi-style characters that have become something of a Knit the City signature.
Joining and Assembly
One of the most distinctive aspects of Building Blocks is its focus on assembly — the techniques used to join individual pieces into large, coherent installations. This is something most knitting books barely mention, because most knitting is finished as a single garment. But Knit the City’s work is almost always collaborative: dozens of crafters contribute individual panels, squares, characters, or motifs that are then assembled on site into something much larger.
The book covers seaming methods in practical depth, explains how to plan a modular project so that individual pieces will join up correctly when the time comes, and discusses how to attach finished fabric to real-world surfaces — trees, railings, benches, bollards — in ways that are secure enough to survive a British winter but also temporary and removable, leaving no lasting damage.
The Stories Between the Stitches
Technical content alone could not carry a book this ambitious, and Knit the City knows it. Building Blocks is threaded through with the collective’s own history: the stories behind specific installations, the challenges they encountered, the collaborative processes they developed, and the responses — from delighted surprise to occasional bafflement — that their public work has received.
These stories do several things at once. They serve as extended project case studies, showing how the technical skills described elsewhere in the book have been applied in real contexts. They humanise the craft, reminding readers that even highly skilled, experienced makers face problems and have to improvise. And they build a picture of what it actually means to work collectively on creative projects — the logistics, the communication, the compromise, and the extraordinary sense of shared achievement when something large and beautiful appears overnight on a London street.
One recurring theme is the relationship between craft and place. Knit the City has always been specifically interested in London — not just as a backdrop but as a subject. Their installations often reference the history, literature, and cultural life of the specific locations where they are placed. A piece installed near the British Library might reference the books held inside. A piece near the Thames might echo the patterns of water and tide. Building Blocks explores this relationship between making and location with genuine thoughtfulness, and it invites readers to think about their own relationship to the places they inhabit and how craft might be a way of engaging with those places more actively.
Who Is Building Blocks For?
This is a book with a genuinely wide potential readership, which is part of what makes it valuable.
For intermediate and advanced knitters and crocheters, it offers technical depth in areas — colourwork, texture, three-dimensional construction, large-scale assembly — that are underserved by most mainstream craft publishing. The specific demands of outdoor installation work have pushed Knit the City to develop expertise that is broadly useful well beyond yarn bombing.
For beginners who are serious about their craft, it works as a roadmap: a clear picture of where the foundational skills they are currently building can eventually lead, and a set of accessible techniques to start with.
For anyone interested in craft as a form of social practice or public art, it is one of the most thorough and honest accounts available of what it actually looks like to bring those ideas into the world. The book does not romanticise collective working or gloss over the logistical challenges of public installation. It shows the work clearly, including the parts that are difficult.
For readers with no craft background at all, it works as a cultural document — a record of a movement, a set of ideas about cities and community and creativity, presented through the lens of one particularly inventive and committed collective.
Yarn Bombing and the Broader Craft Movement
To fully appreciate what Knit the City has done and what Building Blocks represents, it helps to place them within the broader context of contemporary craft practice.
The early twenty-first century saw a significant revival of interest in traditional handcrafts — knitting, crochet, embroidery, weaving — among younger makers who brought to those crafts a set of attitudes quite different from the domestic, functional framing that had surrounded them for much of the twentieth century. This revival was shaped by feminist reclamation of craft as a serious creative practice, by the DIY and maker culture that grew up around the internet, by a widespread hunger for tangible making in an increasingly digital world, and by a growing interest in slow, sustainable production as a counterpoint to fast fashion and disposable consumption.
Yarn bombing emerged from this moment as one of its most visible and photogenic expressions. By taking knitting and crochet outside — by making them public, collective, surprising, and sometimes explicitly political — yarn bombers challenged the assumption that these crafts were inherently minor, domestic, or feminine in a limiting sense. They made the case that a knitted object could be a statement, a contribution to public space, a form of community building.
Knit the City has been one of the most sophisticated practitioners of this approach, and Building Blocks is their most complete articulation of the ideas behind it.
Practical Tips for Getting Started with Your Own Yarn Installation
Reading Building Blocks will inevitably inspire some readers to want to try their own hand at public craft. Here are some practical starting points, drawn from the principles in the book.
Start small. Your first installation does not need to cover a lamppost from base to top. A single knitted panel, a small crocheted character, or even a decorated door handle can be a complete and satisfying piece of public work in its own right. Knit the City’s earliest pieces were modest by their later standards, and starting small lets you learn about materials, attachment, and public response without committing enormous resources.
Choose your yarn carefully. Not all yarn is suited to outdoor exposure. Wool has natural resilience and some water resistance, but it can felt if it gets very wet and is handled roughly. Acrylic yarns are generally more weatherproof and are often the practical choice for anything intended to stay out for more than a week or two. Building Blocks discusses material choice in useful detail, and that guidance is worth reading carefully before you commit to a large project.
Think about attachment from the start. The method you will use to fix your work to a surface should influence how you knit or crochet it. Ties, cables, hooks, and zips all have different implications for the structure of your piece. Planning attachment early means you will not finish a beautiful panel and then have no good way to get it onto the tree.
Work collaboratively if you can. The most ambitious yarn installations are collaborative by necessity — there is simply too much fabric for one person to produce in a reasonable time. But collaboration also enriches the creative process. Recruiting friends, family members, or members of a local knitting group to contribute pieces to a shared project brings in skills and ideas you would not have reached alone, and it spreads the joy of the finished work across a wider community.
Document everything. Yarn bombing is by definition temporary. The installation will eventually come down, whether removed by you, by a council, or by the weather. Photographs and video are how the work persists, how it gets shared, how it inspires others. Knit the City’s public profile has been built substantially on the quality of their documentation, and Building Blocks implicitly makes the case for treating documentation as an integral part of the practice, not an optional extra.
Why Building Blocks Belongs on Your Shelf
There are a great many knitting and crochet books in the world. Most of them are competent, some of them are beautiful, and a few of them genuinely expand what you think the craft can do. Building Blocks falls into that last category.
It expands what you think knitting and crochet can do by showing them at their most ambitious — at the scale of city streets, in the service of public delight, through the labour of communities of makers working together. And it does this without abandoning the careful, practical teaching that makes a craft book actually useful.
The book also offers something rarer: a genuine point of view. Knit the City believes that craft matters, that public space matters, that the encounter between the two can create something meaningful. Building Blocks makes that argument not through manifesto or polemic but through example — through beautiful photographs, detailed instructions, honest storytelling, and a palpable enthusiasm for the possibilities of wool in the world.
Whether you are a seasoned crafter looking to push your skills in new directions, a newcomer wanting to understand what this craft can become, or simply someone who has always smiled at the sight of a knitted lamppost and wanted to understand the minds behind it — Building Blocks has something genuinely valuable to offer you.
Pick it up. Cast on. See what happens when you take your knitting outside.
