Thirty different document libraries, provisioned over four years, with thirty slightly different sets of columns for what is nominally the same kind of content. That is not a hypothetical. It is the default outcome of letting site creation run without a maintained standard, and it is one of the quieter forms of technical debt a SharePoint tenant accumulates.
What template sprawl actually looks like
No single event causes it. A project site gets created from whatever template a departed admin favoured three years ago. A new hire spins up a team site from Microsoft's default rather than the org's approved starting point, because nobody told them one existed. A department standardises its own content types independently of IT, because waiting for a formal request felt slower than solving the problem themselves. Each decision is reasonable in isolation. The accumulated effect is a tenant where "the client project site" means thirty different things depending on which year the site was created.
The symptom that usually surfaces first is search. A user looking for "all active client contracts" across sites gets inconsistent results, because half the sites tag contracts with a custom "Contract Status" column and the other half use a generic "Status" field with different value options. The search index has no way to reconcile the two. The problem was never search; it was that nobody enforced a shared vocabulary at the point of site creation.
Why self-service site creation accelerates the problem
Self-service site creation is genuinely useful. Teams that would otherwise wait days for IT to provision a site can start working immediately. The tradeoff is that whoever clicks "create" rarely knows, or is asked to care, what the organisation's standard library structure should look like. Microsoft's out-of-the-box team site template is a sensible general default, but it is not tailored to your organisation's content types, retention needs, or naming conventions. Left unmanaged, self-service creation produces exactly as many structural variants as there are people creating sites.
Hub sites help, but only when sites actually get associated with the right hub and inherit its navigation and branding. Association is optional at creation time, and busy site owners frequently skip it. A hub with excellent structure and twelve associated sites out of forty active sites is still forty sites' worth of sprawl risk.
A concrete example
Picture two client project sites created eighteen months apart at the same firm. The first uses a custom "Deliverable" content type with columns for status, due date, and approver. The second, created after a staff turnover left nobody remembering the standard existed, uses the generic "Document" content type with no status tracking at all. Both sites hold functionally identical content. A report built against the "Deliverable" content type finds items on the first site and misses everything on the second, not because the data is wrong, but because the report was never told the second site's content lives under a different label.
Multiply that gap across forty sites created over several years by different people, and a simple question like "how many deliverables are overdue across all client projects" stops having a reliable answer without someone manually checking every site.
Where the cost shows up
| Area affected | Practical impact of template sprawl |
|---|---|
| Search and discovery | Inconsistent metadata means refiners and managed properties do not behave the same way across sites, degrading result quality tenant-wide. |
| Permission audits | Column-level metadata used to scope sensitivity labels or access rules cannot be trusted consistently when the underlying content type varies site to site. |
| Reporting | A tenant-wide report on "all contracts" or "all active projects" has to account for every variant naming scheme, or it silently under-reports. |
| Migration and consolidation | A future migration project has to reconcile mismatched schemas site by site instead of applying one column mapping across the board, adding weeks to the planning phase. |
| New employee onboarding | Every inconsistent site is a small extra thing a new team member has to learn, rather than a pattern they can apply everywhere. |
The hub site question
Hub sites were Microsoft's answer to exactly this problem, and they work well for the part of sprawl that is visual and navigational: shared branding, shared navigation, shared search scope. What a hub does not enforce is the schema underneath. Two sites can share a hub, look identical in navigation, and still store the same kind of content under two entirely different sets of columns. A hub gives you consistent presentation on top of inconsistent structure, which is genuinely useful but easy to mistake for having solved the underlying problem.
Hub association is also opt-in at every step: a site owner has to choose to associate, and nothing forces re-association if a site was created outside the hub structure originally. Tenants that assume "we use hub sites, so we're fine" are often surprised at how many sites, particularly ones created before the hub existed, were never folded in.
What is actually fixable, and what isn't
Going forward is the easier half. Pick one approved site template (or a small, deliberate set for genuinely different use cases: project sites, department sites, client sites), publish it as the default in the site creation flow, and require new sites to associate with the relevant hub at creation. This stops new sprawl. It does nothing for the sites that already exist.
Retroactive fixes are the harder half, and they are also where most governance efforts quietly give up. Recreating thirty libraries' worth of history under a new schema is not realistic, and nobody is proposing it. What is realistic: standardising the content type applied to items going forward within existing libraries, so that new content at least follows the current standard even if historical content doesn't get retagged.
ShareMaster's Explore Master includes bulk content type updates, which lets you push a corrected content type across the items in a library in one operation rather than opening each item's properties individually. It does not rebuild library structure or migrate columns between different schemas; it applies an existing content type where the current one is wrong. That is a meaningful, bounded fix, not a full remediation of every inconsistency a tenant has accumulated.
See how bulk content type updates work
Getting visibility before you commit to a fix
The starting point for any of this is knowing what you actually have. A site-by-site walkthrough does not scale past a handful of sites. ShareMaster's Report Master exports a site inventory across the tenant, which is the practical first step for seeing how many variants of "the same" site type actually exist before deciding where to draw the standardisation line. The site inventory guide walks through building that picture in more detail, and the same inventory is useful whether the next step is a migration, a consolidation, or simply a cleanup.
A phased approach that doesn't stall on day one
Organisations that attempt template standardisation as a single big-bang project tend to abandon it around the point where the site inventory reveals just how many variants exist. A phased approach holds up better in practice:
- Freeze the standard. Agree on one approved template (or a small, named set) and make it the default in the site creation flow before touching any existing site.
- Rank existing sites by traffic and risk. A rarely-visited archive site with inconsistent columns costs far less than a heavily-used department hub with the same problem. Fix the second one first.
- Standardise content types on the highest-priority sites. Apply the correct content type to existing items in those libraries, without attempting to rebuild the library from scratch.
- Re-inventory every six months. Sprawl is a moving target. A one-time cleanup without a recheck cadence drifts back to where it started within a year or two.
Each step produces a visible result on its own, which matters for keeping the effort funded and staffed past the first quarter. A programme that promises to fix everything before showing any progress rarely survives contact with the next budget cycle.
A reasonable target, not a perfect one
Nobody is going to retrofit four years of independent site creation into one perfectly consistent schema, and chasing that goal usually stalls the whole effort. A more achievable target: one current standard, applied to everything created from today forward, plus a prioritised list of the highest-traffic existing sites brought into line first. Template sprawl is a form of debt. Like most debt, the point is not to eliminate it overnight; it is to stop it compounding and start paying down the parts that cost the most.