Website Renewal Costs: What to Carry Over and What to Rebuild
A neutral guide to website renewal costs by motivation, covering what to carry over (domain, content, SEO value), partial renewals, and the risk of losing search traffic when URLs change.
Website Renewal Costs: What to Carry Over and What to Rebuild
The cost of a website renewal depends heavily on how much of the existing site is carried over versus rebuilt. A full renewal that rebuilds the design from scratch is one option; a partial renewal that keeps the existing design but updates mobile responsiveness or the CMS is another. Depending on which path you choose, costs can range from a few hundred thousand yen to several million yen. This article breaks down renewal costs by motivation, what to watch for when carrying over existing assets, and how to approach the project without common pitfalls. The figures below are general guidelines only; actual costs vary by requirements, so it is worth requesting quotes from multiple vendors and comparing them.
Cost by Renewal Motivation
- Visual refresh: Addressing a dated design; can range from a template swap to a fully custom redesign
- Mobile responsiveness: Converting a desktop-only site to work on smartphones and tablets
- CMS migration: Moving from an outdated system to a CMS that is easier to update
- Traffic/conversion improvement: Rethinking site structure with SEO, user flow, and conversion goals in mind
- Combined motivations: A full renewal that addresses design, mobile support, and traffic improvement together
Cost Ranges by Approach and Scale
| Renewal Type | Approximate Cost Range | Characteristics |
|---|---|---|
| Partial renewal (minor design tweaks, CMS addition only, etc.) | ¥100,000–¥500,000 | Keeps existing structure and content, refreshes only specific parts |
| Template-based renewal | ¥300,000–¥1,000,000 | Uses a design template for a relatively fast, lower-cost refresh |
| Full renewal with custom design, small-to-mid scale | ¥1,000,000–¥3,000,000 | Roughly 5–20 pages, structure and design rebuilt from scratch |
| Full renewal with custom design, large scale | ¥3,000,000+ | Large-scale sites, often including traffic strategy and branding work |
These figures are general guidelines only. Actual costs vary depending on the condition of the existing site (how easy the old system is to dismantle and migrate) and the volume of content being carried over. Sites that have been running for many years tend to have more pages, making migration effort harder to estimate — it is worth confirming whether an upfront audit of the current site is included in the quote.
How to Carry Over Existing Assets
How you handle existing assets — domain, content, and accumulated SEO value — affects not just cost but outcomes. Keeping the same domain and URL structure makes it easier to carry over the search engine standing the site has built up over time. If you do change the domain or URL structure, failing to set up proper redirects (forwarding old URLs to new ones) can cause a significant drop in search traffic. Content also needs consideration: migrating it as-is takes less effort than reviewing and rewriting it, so taking inventory of existing content before starting improves the accuracy of any quote.
Partial Renewal as an Option
If the site feels generally outdated but the budget is limited, a partial renewal is worth considering instead of a full rebuild. For general approaches to controlling costs, see How to Reduce System Development Costs. For example, refreshing only the homepage and key subpages, prioritizing mobile responsiveness alone, or adding a CMS only where updates are most burdensome can address the highest-priority issues while keeping costs down. A full renewal is not always the optimal choice — identifying where the current site's problems actually lie, and checking whether a partial fix addresses them, is key to getting good value for the investment.
A Common Failure: Losing Search Traffic When URLs Change
One of the most common renewal mistakes is changing the URL structure without setting up redirects, causing pages that had built up search engine standing to lose that value and search traffic to drop sharply. A related issue occurs when pages are deleted or merged and the old URLs simply return 404 errors, causing both users and search engines to bounce. When planning a renewal, it is essential to align with the vendor beforehand — not just on design and functionality, but on how the URLs and search standing of existing pages will be carried over.
How to Approach the Project and Avoid Pitfalls
- Clarify the purpose of the renewal: Priorities differ depending on whether the goal is a visual refresh, mobile support, or traffic improvement
- Take inventory of existing content and URLs: Decide in advance what to carry over and what to rebuild
- Confirm the redirect policy: Always set up forwarding from old URLs to new ones when the URL structure changes
- Request quotes from multiple vendors for identical requirements: Compare quotes for both full and partial renewal options
- Confirm the post-launch operating structure: Decide who will handle updates and maintenance after the renewal. See the system procurement guide for what to sort out before commissioning the project
Is a renewal cheaper than building a new site from scratch?
It depends on how much of the existing assets — design, content, systems — can be reused. The more that can be reused, the more cost-effective a renewal tends to be. But if the existing system is difficult to dismantle and migrate, the cost can approach that of building from scratch.
Can a renewal hurt search rankings?
Yes, if redirects are not set up properly when the URL structure changes, or if high-value pages are deleted or merged without care, search traffic can drop. It's important to review the search standing of existing pages beforehand and align on a redirect policy with the vendor.
What should I do if the budget is limited?
A partial renewal is worth considering instead of a full rebuild. Narrowing the scope to mobile responsiveness, a CMS addition, or just the homepage design — based on which issues matter most — can keep costs down while still delivering meaningful improvement.
Summary
Website renewal costs vary significantly depending on whether you choose a partial or full renewal, and how much of your existing assets — domain, content, and SEO value — you carry over. Changing the URL structure without proper redirects carries a real risk of losing search traffic, so this deserves particular care. Start by identifying the current site's actual problems, decide whether a full or partial approach fits, and request quotes from multiple vendors to compare — this is the most reliable path to a renewal that doesn't backfire.
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