Two numbers first, because that is what you came for.
Here, a website costs $1,500 to $6,500, one time. A three page site is $1,500. A page for every service you sell and every town you drive to is twenty pages and $6,500. Most Castle Rock trades land near $3,500, and whatever your number is, it goes in writing before anything starts.
The rest of this article is what those numbers buy, why other quotes for "a website" run from $99 a month to $15,000, and how to tell which one you actually need.
What the agencies that rank for Castle Rock web design actually charge
On the 30th of September I went through every page that ranks on page one for this town and wrote down what each one printed. Half printed nothing. Of the ones that did, here they are next to the national range for a small business build.

Prices as printed on each company's Castle Rock page, 30 September 2026. The national range is from the 2026 OneLittleWeb and GoDaddy pricing studies.
Three things worth noticing.
The agency that ranks highest for this town says most of its Castle Rock projects run $7,500 to $15,000 and take six to ten weeks. That is a real number, and for some businesses it is the right one. It is not the right one for a two-truck plumbing company.
Two of the page-one results are not selling a site at all. One is $99 a month with nothing up front. One is a "free" site inside a $449 a month marketing package. Over two years the first costs $2,376 and the second costs $10,776, and at the end of either you own nothing, because the site lives on their platform and goes when you stop paying.
And the spread between the cheapest one-time price and the most expensive is six to one. You cannot buy a truck for six times more and get six times the truck. You can in this business, because "a website" is not one thing.
The four things that move the price
When somebody in Castle Rock asks me what a site will cost, I ask four questions back. The answers put the number between $1,500 and $6,500, and nothing else moves it much.

The four questions asked before every quote here goes in writing.
How many services do you sell? This is nearly the whole price. Each service that people search for on its own, tree removal, stump grinding, panel upgrades, EV chargers, gets its own page, because one Services page listing eight jobs cannot rank for any of them. A business with three services and a business with twelve are different builds.
How many towns do you drive to? Somebody in Founders Village and somebody in Castle Pines type different searches. Each town you genuinely cover earns a page written about that town, not the Castle Rock page with the name swapped, which Google can tell.
Are the photos and words yours? Real job photos from your phone cost nothing and sell better than any stock image. Words written from a call with you beat template copy. This does not raise the build price. It lowers what the site costs you later, in jobs you did not get.
Do you need WordPress? Usually not. It does not change the build price much, but it adds $1,200 to $4,100 a year in hosting, plugin licenses and updates. If you do not publish weekly or need bookings, that is rent for nothing. I wrote a whole page on when WordPress is worth it in Castle Rock.
What $1,500, $3,500 and $6,500 each get you
Same quality, same ownership, same two to three weeks. The difference is how much of Castle Rock the site covers.

The exact number goes in writing before anything starts.
The $3,500 build is where most trades here end up, and it is worth being specific about what is in it, because that is the tier the $99 a month sites are pretending to be. A page for each service you actually sell. A page for the two or three towns you drive to most. Your reviews on the page, with the Google mark. Your own photos. Your number in the header, tap to call on a phone. A short form. Your Google listing set up and pointed at the site. All of it in your name.
Here are two sites in that range, for two businesses that are nothing like each other.

A Denver water services company. One owner, a specialised trade, a site that explains it in plain words.

An Aurora vehicle wrap shop. The work is the picture, so the picture is the page.
The price that actually matters
A site is a cost once. The question is what it earns against what you pay now.
If you buy leads, you already know that number. Angi and Thumbtack run $15 to $85 a lead, shared with three to eight other contractors, and owners report $150 to $400 per booked job once the sharing is counted. A $3,500 site that brings two extra jobs a month has paid for itself by spring, and unlike the leads, it is still there in year three, still yours, still not charging you per call.
The other comparison is the monthly plan. $99 a month sounds like nothing. It is $1,188 a year, every year, for a site on somebody else's platform. Two years in you have paid for a proper build and own none of it.
What a Castle Rock website should not cost you
Three things I see in quotes here, and none of them should be on yours.
Twelve months of payments before you own the site. A site is a one-time purchase. Hosting and a domain are small and in your name.
A platform fee for a platform you do not need. If the quote includes "CMS licensing" or a "premium theme" and you sell eight services that change once a year, ask what it is for.
Copywriting and photography as separate line items at $2,000 each. Your words come from a call with you. Your photos come from your phone after your next three jobs. Both are free and both are better.
Where to start
The honest first step is not a quote, it is a look at what you have. The $47 teardown shows you what your current site does on a phone, which pages Google actually ranks, and the three Castle Rock competitors in your trade beating you. It is free if you go ahead with any service and yours to keep either way, and the number that follows it goes in writing.
The same prices apply in Castle Pines, and web design in Castle Pines covers what changes north of County Line Road.
If you want the line-by-line version of every price first, it is on the pricing page. What a Castle Rock build includes, section by section, is on web design in Castle Rock. And if you are an owner-operator wondering whether a site is worth it at all, that question gets its own page: small business web design in Castle Rock.