Record a Performance Baseline Before a Website Redesign
Without a baseline, nobody can say whether a website redesign helped. Search Console and Google Analytics both limit how far back their data goes, so the numbers you will want to compare against need to be saved before launch, not after.
Three months after a redesign goes live, someone asks the obvious question: is the new site doing better? Too often the honest answer is that nobody knows, because nobody wrote down how the old site was doing. By the time the question comes up, some of the data that could have answered it has already aged out of the tools.
This article explains what a performance baseline is, why the default limits in Google Search Console and Google Analytics 4 make it time-sensitive, and which numbers a service business should save before a redesign launches.
What a baseline is, and why redesigns need one
A baseline is a record of how the current site performs, captured in a form you can compare with the redesigned site once it’s live. It answers “compared to what?” before anyone asks.
Redesigns make that comparison unusually hard. Launch day often changes many things at once: page structure, URLs, copy, forms, and tracking. Search engines also need time to process the changes. Google’s guidance on debugging traffic drops notes that when a site moves pages, a medium-sized website can take a few weeks for Google to notice the change, and larger sites can take longer. Early fluctuations are expected, which is exactly why you need a stable reference point from before they began.
What goes wrong without one
- Seasonality looks like success or failure. A firm that does most of its business in spring may launch in March and credit the redesign for a lift that happens every year.
- Arguments replace evidence. Without numbers, “the new site feels slower to bring in work” and “the new site is clearly better” are both just opinions.
- Real problems hide. A broken form or a missing redirect shows up as a drop only if you know what normal looked like.
Why the data won’t wait for you
The urgency comes from how long each tool keeps its data. Both have limits that can quietly erase the comparison you will want later.
Search Console keeps 16 months
Google Search Console’s Performance report shows clicks, impressions, average position, and click-through rate for your site in Google Search. Google’s traffic-drop guide recommends setting the date filter to the last 16 months to check whether a dip happens every year, and notes that keeping data beyond that requires the Search Analytics API or the bulk data export to store it yourself.
The practical limits matter when you export:
- The interface exports up to 1,000 rows. Google’s 2022 deep dive into performance data says the most you can export from the Search Console interface is 1,000 rows.
- The API goes further. The same post puts the API’s upper limit at 50,000 rows per day, per site, per search type, retrieved up to 25,000 rows per request.
- Some queries never appear. Search Console omits anonymized queries, ones not issued by more than a few dozen users over a two-to-three-month period, from its tables, although they count toward chart totals.
- Bulk export isn’t retroactive. Search Console’s bulk data export to BigQuery begins with the day it runs; Google’s help page directs anyone who wants earlier history to the API or the reports.
For a small service site, the 1,000-row export of top pages and queries for the last 16 months is often enough. For a larger site, it is worth having a developer pull the fuller data through the API before launch.
Google Analytics 4 may keep only two months of detail
Google Analytics 4 lets a standard property keep user-level and event-level data for 2 months or 14 months, according to Google’s data retention help page. It is worth checking which one yours uses. That setting doesn’t affect the standard aggregated reports, but it does limit explorations and funnel reports, the tools you’d use to examine a specific journey or compare segments in detail.
Two details make it worth checking early. Increasing retention applies only to data that hasn’t already been deleted, and Analytics waits 24 hours before applying a change. A property left on two months for years has already lost that detail, and changing the setting today won’t recover it.
“The best time to measure the old site is while it still exists.”
- Windware Studio Practice Note
What to record before launch
Think of a baseline like the photographs a contractor takes before renovating a room. They aren’t interesting on the day, but they settle every later question about what changed.
The core measurements
| Measurement | Where it comes from | Why it matters |
|---|---|---|
| Search clicks and impressions, last 16 months | Search Console Performance report | Shows seasonality and the starting point for search visibility |
| Top pages and top queries | Search Console, exported by page and by query | Identifies what the redirect map and new content must protect |
| Sessions and engagement by landing page | Google Analytics 4 standard reports | Shows which pages people actually arrive on |
| Inquiries per month, by source | Your inbox, CRM, or form tool | The business outcome the site exists to produce |
| Key events currently tracked | Google Analytics 4 admin settings | Shows which actions are measured now, so you can keep or improve them |
Checklist: before the redesign goes live
- Export Search Console performance data for the last 16 months, by page and by query.
- Set Google Analytics 4 data retention to 14 months if it is currently set to 2.
- Save the standard reports you rely on, with dates, as spreadsheets or PDFs.
- Count inquiries per month for at least the last year, noting how each arrived (form, phone, email).
- List what the current site tracks as key events, and decide what the new site should track.
- Add a Search Console annotation on launch day.
- Agree in advance when you will compare: for example, at 4, 8, and 12 weeks, against the same weeks a year earlier.
Marking the launch date
Search Console now lets owners and full users add custom annotations to Performance charts. Google introduced the feature on 17 November 2025; each note can be up to 120 characters, a property can hold up to 200, and everyone with access to the property can see them. Add yours on launch day itself. A short note such as “New site live, URLs changed” saves a lot of guessing six months later.
What a baseline can and can’t prove
A baseline makes a comparison possible. It doesn’t make it clean. Search demand shifts, competitors change their sites, and Google updates its systems, all independently of your redesign. A rise after launch is consistent with the redesign working; it isn’t proof.
The strongest comparisons are narrow and planned: the same pages, the same months a year apart, and the same business outcome counted the same way. For most service businesses, that outcome is inquiries. Search clicks and engagement explain why inquiries changed, but the number of qualified conversations is what tells you whether the investment paid off.
There is also a measurement trap to avoid. If the new site tracks forms differently from the old one, a jump in “conversions” may reflect a change in counting rather than a change in behavior. Keep one count, such as inquiries logged in the inbox or CRM, that doesn’t depend on the website’s tracking at all.
Practical takeaways for your next website
- Save before you change. Export search data and reports while the old site is still live; some of it can’t be recovered later.
- Check retention now. If Google Analytics 4 is on two months, move it to 14 today. The change only protects data from this point forward.
- Count inquiries independently. Your inbox or CRM is the baseline that survives any tracking change.
- Mark the launch. An annotation turns a mysterious bump in a chart into a dated, explainable event.
- Compare like with like. Same pages, same season, same definition of a lead, at intervals agreed before launch.
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