If the Business model page explains how DomiDo earns and the Pricing and economics page explains what shapes the numbers, this page explains what the block system enables, what filters out of scope, and how the platform reasons about the breadth of designs in the gallery. DomiDo's commercial offering is the universal block system itself — blocks and fasteners — and every constructed object on the platform is user-generated through the gallery, either authored directly by the customer or selected from another designer's published work. There is no fixed hero-product line and no manufactured catalogue of finished structures; the catalogue is the gallery, and what populates the gallery is a mix of early reference designs published by Avvyland Limited before the marketplace opens, customer-authored Mode A and Mode B work, and (from Phase C) third-party designer publications.
This page is for everyone who needs the what and why of the platform's scope — product managers prioritising the roadmap, designers reasoning about what to publish, marketers writing copy that lands, and partners trying to understand the path from launch to a mature ecosystem.
DomiDo blocks are injection-moulded interlocking units in a UV-stabilised plastic. The leading material candidate is acrylonitrile butadiene styrene (commonly abbreviated ABS) with ultraviolet-resistance additives, though other resin options remain open while outdoor performance is validated. Block sizes span a one-inch cube up to a 2×8×4-inch unit, with around ten distinct sizes in the launch range. The connection is a proprietary tool-free interlock; the outer face is standardised at one-and-a-quarter inches across all blocks; the launch colour range spans a small set of core colours. Performance characteristics that shape what can be made include ultraviolet resistance rated for many years of outdoor exposure, continuous service across realistic United Kingdom outdoor temperatures, full waterproofing, and resistance to garden chemicals and most household cleaners. The form factor is solid cuboids only — no curves, arches, or tapered blocks. That last point matters because it filters out designs whose essential form requires non-cuboid geometry.
Before any design is encouraged in the gallery, it must pass five binary filters; failure on any one disqualifies the design from the manufacturing path. The thermal-safety filter rejects direct contact with heat sources above the plastic's continuous service temperature — this eliminates pizza-oven enclosures outright and scores smoker enclosures very low. The structural-load filter rejects primary load-bearing structure for human occupancy because blocks are not certified as building materials under United Kingdom Building Regulations — this eliminates full garden rooms (walls only, not structural) and retaining walls exceeding one metre in height without engineering review. The geometric-feasibility filter requires that the design's essential form is achievable with solid cuboid blocks; designs requiring curves, very thin elements, or complex internal geometry are penalised, and designs where a blocky aesthetic is fundamentally incompatible with customer expectations (ornamental statues, flowing water features) are eliminated. The self-containment filter requires that the design be primarily (more than half) composed of DomiDo blocks; designs where blocks merely frame other materials (wire mesh, glass, plumbing) are penalised proportionally, and designs below a third block composition are eliminated. The regulatory-feasibility filter requires that the design not routinely require planning permission, building-control approval, or specialist certification as a standard condition of installation; designs that sometimes need permission (privacy screens above two metres, for example) are acceptable with clear guidance, and designs that always need approval (building extensions) are eliminated. The filters are deliberately strict: the platform's structural and safety claims must be defensible, and customers must be able to buy a kit without bureaucratic friction.
Designs passing all five hard filters are then evaluated against a fourteen-criterion framework, with each criterion on a one-to-ten scale and weighted by commercial importance. The criteria are search volume in the United Kingdom market (quantifying real consumer demand); market size (the value of the addressable category); competitive intensity (how saturated and how strong the incumbent set is); block-system advantage (the gap between what DomiDo enables and what existing alternatives offer); custom-fit necessity (whether every installation needs different dimensions, which favours an artificial-intelligence-assisted design platform over a fixed catalogue elsewhere); block superiority (whether blocks are genuinely better than alternative materials for this use case, not just acceptable); self-containment (block share of the finished object); geometric compatibility (how naturally the design's form maps onto cuboid blocks); replacement-cycle frequency (how often a customer is likely to come back for a related design); unit-economics fit (gross margin and per-unit cost compatibility with platform targets); photo-and-video shareability (how content-worthy a finished installation is); cross-sell potential (whether buying this design naturally leads to interest in related designs); brand-narrative fit (whether the design category reinforces or dilutes DomiDo's positioning); and risk profile (regulatory, structural, and liability considerations). The composite score is out of ten — categories scoring above seven and a half consistently are well-suited to the block system, those between six and seven and a half are workable with attention, and below six the system is not a good match.
Analysis across the breadth of potential use cases reveals a clear pattern: the highest-scoring designs share four characteristics. They are one hundred percent blocks (the object is the blocks, with no external parts required). They are naturally rectangular (the ideal form is cuboid or composed of flat rectangular surfaces). They are custom-sized (every installation requires different dimensions, making fixed-catalogue alternatives elsewhere inadequate). And they are artificial-intelligence-enhanced (the design tool adds genuine value beyond a basic configurator). Designs hitting all four consistently score above seven and a half. This pure-block sweet spot guides marketing emphasis and helps the designer community understand where the block system shines. Designs with significant non-block components (a barbecue surround using stone with a block facing, for example) sit lower on the recommendation scale.
Across the breadth of designs the block system can support, fifteen broad categories of object surface frequently. These are categories of use case the block system enables, not products DomiDo ships; whether a particular design exists is a function of what the designer community publishes in the gallery. The categories include garden growing structures (raised beds, herb spirals, vertical frames, cold frames); garden borders and edging (garden borders, lawn edging, tree rings, step risers); privacy and screening (privacy screens, balcony screens, oil-tank screens, meter-box covers); utility concealment (wheelie-bin shelters, water-butt enclosures, heat-pump covers, log stores); garden walls and features (decorative walls, entrance walls, feature walls, seating walls, retaining walls within height limits); children's play (play castles, mini mazes, obstacle courses, sandpit frames, den or hideout frames); pet and animal structures (catios, chicken coops, pet memorials, fairy-garden enclosures); water features and ponds (pond surrounds, koi-pond surrounds, rain-garden frames, water-feature walls — non-pressure-bearing only); outdoor cooking surrounds (barbecue islands, outdoor kitchen modules, outdoor bar counters — with the heat-safety filter applied); garden furniture (benches, stools, planter-bench combinations, potting benches, boot storage); storage and shelter (bike shelters, garden-tool storage, shed bases, garden-office foundations, log stores); outdoor living surrounds (hot-tub surrounds, outdoor-shower enclosures, fire-pit walls); decorative and seasonal pieces (seasonal bases, address pillars, gate pillars, memorial structures, ornamental bridges); commercial and business-to-business (branded retail displays, trade-show booths, restaurant dividers, garden-centre displays, pop-up galleries, exhibition walls); and a United-States-specific group for the expansion-market roadmap (front-porch planters, front-yard feature walls, mailbox enclosures, outdoor-kitchen islands, fire-pit patio walls, address-number pillars).
Any design that enters the manufacturing path through the gallery must pass a quality gate. The same checklist applies whether the design comes from a customer using Mode B, a customer uploading a 3D model, an Avvyland-published reference design, or a designer publishing for the marketplace. The full pipeline must complete without errors on every solver mode; block count must sit within a target range appropriate to the design's overall size; the gap between the fastest solver and the optimal solver must be within fifteen percent; unique stock-keeping-unit count per kit must stay below a target ceiling; gross margin must exceed the platform's minimum target; the React Three Fiber viewer must load in under three seconds on a mid-range mobile device, with all blocks visible, working step-through navigation, no z-fighting artefacts, a functional exploded view, and colours correct per stock-keeping unit; assembly instructions must place exactly one block per step, with no floating blocks in sequence, all fastener operations physically reachable, and total step count bounded relative to block count; and a set of preview images (assembled, exploded, lifestyle context) and an embedded interactive preview must be in place on the design page. Failure of any criterion stops the design from being available for pre-order — it goes back to the designer for revision.
The platform thinks about designs in four size tiers, used as a lens for pricing, marketing emphasis, and conversion analysis. The entry tier covers the smallest variants and starter custom designs — the lowest commitment level, the lowest price point, the natural first purchase. The project tier covers mid-sized variants and standard custom designs — the workhorse of the gallery, the most common purchase, the strongest unit-economics fit. The statement tier covers the largest variants and ambitious custom designs — premium positioning, gallery anchors, drives upgrade conversions. The grand tier covers the largest custom designs and future commercial-and-event work — significant builds for landscapers, event planners, and ambitious homeowners. A single design can span multiple tiers through size variants, so the platform looks coherent across price points without needing distinct stock-keeping units per price point.
The strategic intent is that customers begin with an entry-tier purchase and expand into project- and statement-tier purchases over time. The first purchase is often a small custom design or a small entry-tier gallery design; discovery is paid social or organic content, conversion is fast, average order value is low, gross margin is modest. The second purchase is driven by personalisation (a matching planter, a complementary bench) or by a different category (a privacy screen after a garden border) — average order value rises and customer-acquisition cost has already been paid, so this purchase carries higher gross margin. Third and subsequent purchases come from the "garden transformation" customer — multiple structures over a season or a year — where gross margin is highest because the customer is loyalty-driven and cross-sell becomes the dominant growth lever. Once the marketplace is mature, customers browse a much wider published catalogue of designer work, and customers who started small now find themselves drawn to unique designer offerings, raising basket size and frequency.
Across the first eighteen to twenty-four months, the platform actively encourages and seeds design categories beyond the initial filters. Notable areas to expand into include outdoor barbecue and entertaining surrounds (without direct heat contact — surrounds, bar counters, prep stations); pet-friendly structures (catios in particular show strong fit, with a growing market and natural block-friendly geometry); children's play modules (play castles, sandpit frames, dens); decorative pillars and address structures (high content-worthy potential, natural cuboid geometry, strong margins); pond and water-feature surrounds (an established outdoor-living category with rising demand); and commercial and event modules (partition walls, retail displays, pop-up activations). Each is sequenced based on demand signals from the gallery, marketplace activity, and customer requests captured through support.
A subset of attractive-looking use cases are deliberately not pursued. Garden rooms (full structural) are eliminated on the structural-load filter and cannot meet United Kingdom Building Regulations as a block system. Pizza ovens and smokers are eliminated on the thermal-safety filter. Curved sculptures and ornamental statues are eliminated on the geometric-feasibility filter. Retaining walls above one metre are eliminated on the structural and regulatory filters. Boundary fences above two metres routinely require planning permission. Free-standing swimming-pool surrounds have structural and water-pressure considerations that exceed the block system's certified envelope.
The launch is United Kingdom-only. Expansion to the European Union and the United States is gated on demand and operational signals from the United Kingdom launch. A United-States-specific subset is sized for that eventual expansion (front-porch planters, front-yard feature walls, mailbox enclosures, outdoor-kitchen islands, fire-pit patio walls, address-number pillars, and a United-States-specific take on the heat-pump cover). The United States adaptation requires currency, tax, fulfilment-partner, marketing-channel, and shipping-cost recalculation.
The whole strategy rests on three assumptions that the launch must validate. The first is that gallery designs convert at expected rates — entry-tier designs in particular need to hit their conversion target, because they are the broad customer-acquisition path. The second is that custom-design adoption builds steadily, raising average basket size and gross margin over time; the launch supports both gallery-driven and custom flows from day one, and if custom never takes off, gallery throughput alone has to drive growth. The third is that assembly completion remains above target — if significant numbers of customers buy kits and never finish building them, the customer experience and the gallery flywheel both stall. The minimum-viable-product scope and the decision rules within it are explicitly designed to detect these signals early and respond.