WordPress
When a Theme Is Enough and When It Is Not
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What a theme gives you
A working design for a few tens of pounds, launchable in days. For a small business needing a presentable site quickly, that is genuinely good value.
The costs arrive later, and they are real.
What multipurpose themes cost
- Substantial code you do not need, loading on every page
- Performance you cannot fully fix without rebuilding
- Dependence on the theme author's continued maintenance
- Design constraints that shape your content rather than serving it
- Difficult upgrades if the theme has been modified
The classic pattern is a site that was fast enough at launch and unfixably slow two years later, because the weight is in the theme.
When to build custom
- You need specific functionality no plugin provides properly
- Your content has real structure — several post types with fields
- Performance matters commercially
- You have a defined brand rather than a template to adapt
- The site will be edited frequently by non-technical staff
Cost comparison
| Approach | Build | Three-year total |
|---|---|---|
| Theme, self-configured | £0–£500 | Plus your time, which is not free |
| Theme, professionally set up | £2,000–£5,000 | Moderate |
| Custom build | £6,000–£20,000 | Lower ongoing, faster, easier to edit |
The middle path
A lightweight starter theme customised for your business gives most of the benefit of a custom build at a fraction of the cost.
That is what we recommend most often: not a multipurpose theme, not a build from nothing, but a clean base shaped to what you actually need.
Frequently asked questions
Can we start with a theme and rebuild later?
Yes, and expect to rebuild rather than convert. Budget for it as a second project rather than assuming a migration path.
Are page builders the same problem?
Similar — convenience now, weight and lock-in later. For a business site that matters, usually not worth it.
How long does a custom build take?
Four to ten weeks depending on content volume and functionality.
Will a custom theme be harder to edit?
Built properly, considerably easier — labelled fields rather than a blank canvas and a memory of how it was done last time.
Theme site that has stopped serving you?
Tell us what it cannot do and we will tell you whether it is fixable or worth rebuilding.