Website Design and SEO: One Agency or Two? (2026 Guide)

Website design and SEO are usually bought separately, then blamed on each other. The designer launches a site that looks better. Traffic dips. The SEO agency says the redesign broke things, and the designer says SEO takes time. Both may be partly right, and the owner pays for the argument.

The two setups differ on the things that decide the outcome: who protects rankings at launch, who is accountable afterwards, what each costs over a year, and how easy it is to leave. If you have already decided on one team, our ranked list of web design and SEO companies scores firms that do both.

Should One Agency Handle Website Design and SEO?

One agency should handle website design and SEO when your site is a standard business site, you want one point of accountability, and you lack time to manage two vendors. Two agencies fit when the build is complex or specialised. The deciding factor is who owns the launch checklist, especially redirects and content retention.

Most small business sites are 10 to 50 pages: home, services, locations, about, contact and a blog. Those sites rarely need a design studio and a separate search firm. They need pages that load fast, say clearly what you do and where, and keep growing after launch.

Larger or unusual builds change the math. A custom ecommerce platform, a booking app, or a brand overhaul may need a specialist studio. Our list of web development agencies covers those builders. In that case, hire two, but write the handoff into both contracts.

One Agency vs Two: Side-by-Side Comparison

The table compares the two setups on six factors that come up in almost every redesign. Neither column wins everywhere. Read across the rows that matter most to your business, such as launch risk if search brings most of your leads, then use the decision rules further down to choose.

The exit row is the strongest case for two vendors. If one agency hosts the site and runs the SEO, leaving means moving both at once. That is manageable if ownership is clear, and painful if it is not.

Why Do Redesigns Lose Rankings?

Redesigns usually lose rankings because old URLs change without permanent redirects, content that ranked gets cut, a staging noindex tag ships to the live site, or the new template is slower on phones. Google says some ranking fluctuation during a move is normal and settles. Lasting losses trace back to one of those launch mistakes.

Google's site-move documentation recommends permanent server-side redirects such as 301 or 308, and keeping them "for as long as possible, generally at least 1 year." A designer focused on visuals may rename every URL for neatness and never write that map. Our guide to 301 redirects shows how the mapping should look.

The staging problem is just as common. Designers often block the test site with a noindex rule, which Google describes as a meta tag or header used to prevent indexing. If that tag is still there at launch, pages drop out of search. The Search Console Page indexing report shows which pages Google can index, so check it in the first days after launch.

Mobile is the third trap. Google uses the mobile version of a site's content for indexing and ranking. A design that trims text on phones to look clean can remove the very content that ranked. Speed matters too: Google's Core Web Vitals targets are LCP within 2.5 seconds, INP under 200 milliseconds and CLS under 0.1. Our roundup of Core Web Vitals statistics has more context.

Which Setup Costs Less Over a Year?

Neither setup is always cheaper. One agency usually costs less in coordination and duplicate setup, while two vendors can cost less when you pair a modest design project with a lean SEO plan. Compare twelve-month totals, including hosting and maintenance, and treat a launch that loses traffic as a real cost.

The example below is illustrative, not a quote from any provider. It shows how to lay out the comparison, using round numbers a small service business might see. Replace each line with the figures from your own proposals.

Flip the inputs and the answer flips. A $2,500 template site, $600 of hosting and a $750 SEO plan total $12,100 for the year, which beats the bundle. Which column wins in our example matters less than filling in every line before you compare. Our small business SEO cost guide covers realistic monthly ranges.

For a broader view of what SEO retainers include at each price, see the SEO cost guide. Be careful with bundles that look cheap because the SEO portion is vague. Ask what the monthly SEO work includes in pages, posts or tasks.

Planning a redesign this year? A check-up shows which of your current pages earn traffic, so you know what a launch must protect before you choose a setup.

Book a free SEO check-up →

When to Hire One Agency

One agency is usually the better fit when the site is a standard business site and your time is the scarcest resource. In the four situations below, one accountable team removes more risk than it adds, mostly because nobody has to referee a handoff between vendors.

• You run a local service business. Your site needs service pages, city pages and a steady stream of posts. One team can add them without a handoff.
• Nobody in-house manages vendors. Two agencies need someone to referee. If that person is you, budget the hours.
• Your last redesign lost traffic. Putting launch and SEO with one team removes the gap where the loss happened.
• You want predictable monthly cost. A plan that includes hosting and maintenance avoids surprise project invoices.

When to Hire Two Agencies

Two agencies make sense when the build itself is the hard part, or when you already have an SEO partner you trust. In both cases, the fix for the gap is contractual: the SEO firm signs off on the launch plan.

• The build is custom. Ecommerce with complex catalogues, web apps, or member portals need specialist developers. Our list of WordPress agencies is a starting point for platform specialists.
• Brand is the priority. A full rebrand may justify a design studio. Pick from our web design companies list, then hand SEO to a separate partner.
• You already have a good SEO partner. Keep them and add a designer, rather than restarting SEO with a new team.
• You want vendor independence. Separate contracts let you replace one side without moving everything.

If you go this way, ask the SEO partner for a pre-launch crawl and a post-launch check. An SEO audit service can do that job if your SEO firm will not.

What Should the Launch Contract Say?

Whichever setup you choose, the launch contract should name who builds the URL inventory, who writes and approves the redirect map, who removes the staging noindex, who tests mobile speed, and who monitors Search Console after launch. With one agency these are internal tasks. With two, each needs a named owner.

Also write down ownership. You should hold the domain, the content and admin access to analytics, Search Console and your Business Profile. Google's own advice on hiring an SEO warns that "No one can guarantee a #1 ranking on Google," so treat any contract that promises one as a warning sign.

What Does "SEO Included" Mean in a Website Design Quote?

In most website design quotes, "SEO included" means build-level setup: page titles, meta descriptions, clean URLs, headings, image alt text, a sitemap and a fast, mobile-friendly template. It rarely means ongoing SEO, which is the monthly work of publishing content, updating your Business Profile, fixing issues and reporting results.

Both halves matter, but they are different jobs. The build-level half is done once and then mostly stays done. The ongoing half is what moves rankings over months. A quote that lists "SEO-friendly design" covers the first half only, unless it names monthly deliverables.

To tell real SEO capability from a line on a services page, ask the agency to show a monthly report from a current client with the name hidden, and to say who on the team does the SEO work. Our on-page SEO checklist lists what the build-level half should cover, so you can check the quote line by line.

How Should Design and SEO Work Together During a Build?

SEO should shape the site before anyone designs a page. The right order is research first, then the sitemap and page list, then content, then design around that content, then technical checks during development, and finally launch and post-launch monitoring. Adding SEO after the design is approved means bending finished layouts to fit.

1. Research and page list. Decide which services and locations need their own page, based on what customers search for. This becomes the sitemap.
2. Content before layout. Draft the main copy for each page type so the design makes room for it, instead of trimming text to fit a mockup.
3. Technical checks during development. Test speed, mobile layout and internal links on the staging site. Our technical SEO checklist covers what to test.
4. Structured data. Google uses structured data to understand page content and decide eligibility for rich results. Templates change in a redesign, so revalidate any schema before launch.
5. Launch and monitor. Apply the redirect map, remove the staging noindex, submit the sitemap and watch the Page indexing report for several weeks.

With one agency, this order is one project plan. With two, it only happens if the SEO firm joins at step one, not after the designs are signed off. Internal links are often lost in step two, so our internal linking strategy guide is worth sharing with whoever writes the page copy.

Questions to Ask Before You Sign Either Setup

The same questions work whether you are interviewing one combined agency or a designer and an SEO firm. The goal is to find out who does what after launch, what you own, and what happens if you leave. Vague answers to any of these are worth more weight than a polished portfolio.

• Who on your team does the SEO work, and what do they deliver each month? Look for named tasks and counts. "Ongoing optimisation" on its own is not an answer.
• Who builds and approves the redirect map? One named person, before design starts.
• Who owns the domain, hosting account and analytics? The answer should be you, with the agency added as a user.
• What happens to the site if I cancel? Get the handover process and any fees in writing.
• What results should I expect, and by when? Google suggests asking a provider this directly. A fair answer names a range and the measures, such as indexed pages, rankings for priority terms and leads.
• How long is the contract? A long minimum term on a bundle makes switching the SEO side harder.

Two red flags end the conversation: a promised #1 ranking, which Google says no one can guarantee, and an agency that registers your domain or Search Console property in its own name. You should be able to open your Google Search Console data without asking anyone.

Where theStacc Fits

If one team sounds right for your business, theStacc's Growth Complete plan is built for exactly that setup. It costs $1,299/mo, or $999/mo billed yearly, and adds a hosted, maintained website and a US-based team running the account on top of managed SEO.

The SEO work is the same as our other plans: software does research and drafting, a human SEO team reviews the work and owns strategy, and you get 30 blog articles published per month, Google Business Profile posts, daily review replies, a weekly report and a monthly call. It is month to month with a 30-day money-back guarantee. Read more on our managed SEO service page.

It is not for everyone. There is no local office, meetings are remote, and it does not suit enterprises wanting a large custom design team or heavy link-building and digital PR retainers. For those needs, two specialist vendors are the better route.

Frequently Asked Questions

These are the questions owners ask most when deciding whether to put website design and SEO with one agency. The answers lean on Google's own documentation for site moves, redirects and indexing, and on what a fair launch contract should say about ownership.

Can my web designer also do my SEO?

Sometimes. Many designers handle build-level SEO such as titles, clean URLs and speed. Fewer run ongoing SEO, which means publishing content, managing a Business Profile and reporting every month. Ask what work happens in month three as well as at launch.

Should the SEO agency be involved before a redesign launches?

Yes. The SEO side should list every URL that earns traffic, approve the redirect map and check that ranking content survives the new design. Google recommends permanent redirects kept for at least a year. If SEO arrives after launch, the job becomes repairing damage instead of preventing it.

Is one agency always cheaper than two?

No. A bundle removes duplicate setup and handoff time, but a specialist designer plus a lean SEO plan can cost less. Compare the twelve-month total, including design, hosting, maintenance and SEO, and price in the cost of a launch that loses traffic.

What should I own if one agency hosts my website?

Your domain, your content, and admin access to analytics, Search Console and your Business Profile. Get the exit process in writing: how the site files or content are handed over and how long the agency keeps redirects running after you leave.

When are two separate agencies the better choice?

When the build is complex, such as custom ecommerce, web apps or heavy brand work, and you need a specialist studio. It also works when you already have a strong SEO partner. Have the SEO partner sign off on the launch checklist, which closes the gap between vendors.

Does website design affect SEO?

Yes. Design decides page speed, mobile layout, heading structure and how much text each page carries, and Google uses the mobile version of a page for indexing and ranking. A slow template or a design that cuts copy on phones can hold rankings back even when the content is good.

Does changing website design affect SEO?

It can. A visual refresh that keeps the same URLs and content usually causes little change. A redesign that renames URLs, removes pages or moves text into images can drop rankings unless every old URL is redirected and ranking content is kept. Expect some short-term movement either way.

How much does it cost to add SEO after a website is built?

It depends on how the site was built. A site with clean URLs and editable titles may only need ongoing SEO, priced as a monthly plan (theStacc's start at $749/mo). A site built without SEO may need a technical audit and fixes first, billed as a separate project.

How long does a website redesign with SEO take?

Longer than a cosmetic refresh, because the team has to inventory URLs, map redirects, plan content and run launch checks. Site size, content rewrites and how fast you approve pages decide the timeline. Ask for a written schedule that lists the SEO steps alongside design and build.

Do I need new schema after a redesign?

Not always, but you should revalidate it. New templates can drop structured data fields or put schema on pages where it no longer fits. Test key templates with Google's Rich Results Test before launch and again after go-live.

Decide Who Owns the Launch

The one-agency-or-two question comes down to a single line in a contract: who answers for your search traffic the week after launch. Put that name in writing, whichever setup you choose. Most of the redesign losses described above start in the gap where nobody owned that week.

Google's SEO Starter Guide notes that some changes show up in hours and others take several months, so judge a launch on a fair window. For more providers, see our main list of SEO companies.

Want one team for the website and the SEO? Talk to us about what your current site ranks for and whether Growth Complete fits.

Book a free SEO check-up →

Book a demo →

Sources & references

Akshay VR

Marketing Head

Marketing Head at theStacc. Previously Senior Marketing Specialist at ARKA 360. Runs content strategy and SEO for B2B SaaS.

LinkedIn About theStacc