Website Design and SEO: How Your Site Design Affects Your Google Rankings

Most business owners think about design and SEO as two separate projects.

Web designer builds the site. SEO person optimises it later.

The problem is that design decisions made in week one can create SEO problems that persist for years.

The Design Decisions That Directly Affect SEO

1. Page Speed

This is where design choices have the most direct, measurable impact on rankings.

Slow designs create LCP failures that suppress rankings. Google is explicit: pages with poor Core Web Vitals are at a ranking disadvantage versus faster competitors with similar content quality.

The speed-conversion connection:

• Sites loading in 1 second: 9.6% conversion rate
• Sites loading in 5 seconds: 3.3% conversion rate
• Every 1-second delay: 7% fewer conversions

Common design choices that cause slow load times:

• Large hero images or video backgrounds: A 5MB hero image is the single most common cause of failing LCP scores on Melbourne small business websites. Replace with compressed WebP under 300KB.
• Page builder bloat: Elementor, Divi, and similar page builders add significant CSS and JavaScript to every page. The visual flexibility is worth it only if you offset it with caching and minification.
• Autoplay video: Autoplay video increases page weight dramatically. Use a static thumbnail with a click-to-play instead.
• Third-party embeds: Social feeds, chat widgets, booking widgets loaded from external scripts. Each one adds JavaScript load time. Evaluate each against its conversion value.

Full page speed guide: Core Web Vitals SEO.

2. Mobile Design

Google uses mobile-first indexing. The mobile version of your site is what Google evaluates for rankings.

Design on desktop, test on desktop, and you are optimising for the wrong device.

• Body text minimum 16px — smaller text forces zooming and signals poor mobile experience
• Tap targets (buttons, links) minimum 48px x 48px
• No horizontal scrolling — content wider than the viewport suppresses mobile usability
• No intrusive popups on mobile — Google penalises popups that cover content immediately on page load

Full mobile SEO guide: mobile SEO.

3. Content Visibility to Google

• Content loaded via JavaScript after page load: If your design uses a JavaScript framework that renders content client-side, Google may see a blank page on first crawl. Key content must be in the HTML source.
• Tab and accordion content: Content hidden in collapsed tabs or accordions may not be weighted as highly as main body content.
• Infinite scroll with no HTML pages: Great for users, but if content loaded below the fold is never part of a distinct, indexable URL, Google cannot rank individual pieces of it.
• Images of text: A hero section where the headline is baked into an image means Google cannot read the heading. Always use HTML text for headings.

4. URL Structure

Clean, readable URLs with keywords signal topical relevance to Google and are easier to link to. Set this before launch, changing URLs on a live site requires 301 redirects and creates temporary ranking disruption.

What to Look for When Hiring a Web Designer for an SEO-Ready Site

• What platform will you build on and why? (WordPress, Shopify, custom, each has SEO implications)
• Will the site pass Core Web Vitals on mobile? Can you show past sites' PageSpeed Insights scores?
• How is content structured? Is HTML text accessible to search engines even before JavaScript loads?
• Will title tags, meta descriptions, and H1 headings be separately editable per page?
• Will you implement schema markup for LocalBusiness, Service, and FAQPage types?
• What is the image format and compression strategy?

Khalis Marketing builds websites with SEO built in from day one: website design service.

Redesigning an Existing Site Without Losing Rankings

Frequently Asked Questions

My designer says the site looks great. Why isn't it ranking?

Visual appearance and SEO performance are independent. A beautiful site can have slow load times, JavaScript-hidden content, missing title tags, and no internal linking. Run the site through PageSpeed Insights and Google Search Console to see the specific technical issues.

Should I use a website builder like Wix or Squarespace?

Both generate functional, indexable websites. Wix has improved significantly in technical SEO over the past 3 years. Squarespace has clean HTML output. Neither gives you the same level of customisation as WordPress or a custom build, but both are viable for most Melbourne small business websites. The platform matters less than how it is configured and what content is on it.

Does having a newer, modern design help SEO?

Not directly. A modern design that loads fast, uses clean HTML, and works perfectly on mobile helps SEO. A modern design that uses heavy JavaScript, large assets, and animated elements often hurts it. The technology choices, not the visual style, determine the SEO impact.

About the Author: Bhavleen Singh is the founder of Khalis Marketing. 10 years of SEO experience, Moz Technical SEO Certification, Master of Marketing from Victoria University.