Who lives here
7,816
residents at the 2021 Census
- Median age40
- Aged 65+13.4%
- Under 2531.9%
- Median household income$2,505/wk
- Median rent$525/wk
Hornsby, New South Wales
A narrow ridge suburb where the highway is the only way through.
Mount Colah runs along a narrow ridge carrying the Pacific Highway and the Sydney to Newcastle rail line, with bushland falling away into the valleys on either side. It's a commuter suburb of 7,816 people, and the numbers put it in the upper north shore mould: median household income is $2,505 a week and median age is 40. An estimated 750 businesses trade locally, which is a modest number for a suburb this size and tells you plainly that most residents leave for work rather than working from a shop on a strip.
Professional, scientific and technical services is the largest sector across Hornsby council, with 3,192 businesses, ahead of construction's 2,195, and that mix is close to what actually lives in Mount Colah: consultants, engineers and advisers who commute out each morning. The catch is geography. The ridge gives the suburb one road and one rail line in and out, so anyone searching for a plumber, a physio or a dog groomer here is doing it from a phone on the platform or in traffic, not at a desktop with time to compare tabs. A site that loads fast on mobile and puts a phone number where a thumb can find it matters more here than in a suburb where people can just walk to the next shopfront.
Three vetted Australian developers, hand-picked to a Mount Colah brief, quoted in writing within 24 hours. Free, no obligation.
Live ABS data · updated 2026-08-29
The Mount Colah market, by the numbers.
Pulled from the Australian Bureau of Statistics: the 2021 Census for Mount Colah itself, and the latest Data by Region release (2025) for the Hornsby area. This is the market your website sells into.
The business scene
~750
businesses in Mount Colah (estimated*)
- Hornsby total14,625
- Solo / non-employing8,778
- 1–4 staff4,522
- 5–19 staff1,053
- 20+ staff272
91% of local businesses have fewer than 5 staff. That's exactly who FindDevs was built for.
Biggest local industries
Businesses by industry, Hornsby (2025)
-
Professional, scientific & technical services3,192
-
Construction2,195
-
Rental, hiring & real estate1,561
-
Health care & social assistance1,420
-
Transport, postal & warehousing827
-
Retail trade821
*Suburb business estimate: LGA business count (ABS CABEE, Data by Region) apportioned by the suburb's share of the LGA population at the 2021 Census; rounded to the nearest 10. Sources: ABS Census 2021 (Suburbs and Localities), ABS Data by Region. Refreshed 2026-08-29.
Typical projects
What Mount Colah businesses actually build.
Indicative ranges from briefs like these in the FindDevs network. Your three quotes will be specific to your scope.
Trade & Service Site
Typical price
$3,000 – $8,000
Timeline
2–4 weeks
Built for a builder, electrician or plumber working the ridge and the valleys either side, where a job quote often starts with a phone search from the ute.
- Mobile-first quote request form
- Click-to-call on every page
- Service area map for both valleys
- Before-and-after job gallery
Professional Services Site
Typical price
$3,500 – $9,000
Timeline
3–5 weeks
For the consultants, engineers and advisers who commute out of Mount Colah and need a site that reads as credible as the client meetings they're driving to.
- Clean, credential-led design
- Case studies and service pages
- Booking or enquiry calendar
- SEO for Hornsby-area searches
Property & Rental Portal
Typical price
$4,500 – $12,000
Timeline
4–6 weeks
A searchable listings or booking portal for a property manager, real estate office or allied health clinic handling appointments across the shire.
- Searchable listings or booking
- Automated appointment reminders
- Secure client login area
- Integrates with existing CRM
Free · No signup wall · Stay anonymous if you want · 2 minutes
Why FindDevs in Mount Colah
Local knowledge, without being stuck with one local option.
Three quotes, not one local guess.
In a town of ~750 businesses there might be one or two people building websites, if they're taking work on. We put your brief in front of vetted developers across Australia and hand you three written quotes to compare, in 24 hours.
All Australian. All vetted.
Every developer holds an ABN, works Australian hours, and passed our vetting: portfolio, communication, and references from Aussie clients. 12% acceptance rate. No offshore hand-offs.
Built for Mount Colah's actual customers.
The median age in Mount Colah is 40. Your customers find everything on their phones, usually in a spare minute. We match developers who build mobile-first, fast-loading pages that turn that search into a call or a booking.
Free, with a safety net.
The service costs you nothing. Developers cover our fee from their winning quote, never inflated into your price. And if a matched developer drops the ball mid-project, we step in. Service Guarantee, always.
FAQ
Mount Colah questions.
It depends on what you need. A trade or service site for a builder or electrician working Mount Colah and the surrounding valleys typically runs $3,000 – $8,000 and takes 2–4 weeks. A professional practice site for a consultant or adviser sits around $3,500 – $9,000. A booking or listings portal, the kind a property manager or clinic needs, runs $4,500 – $12,000 over 4–6 weeks. You get three fixed-price quotes from vetted developers within 24 hours, so you can compare before committing.
Timelines depend on scope. A straightforward trade or service site is usually 2–4 weeks from brief to launch. A professional services site with case studies and a booking calendar runs 3–5 weeks. A more complex portal with listings, logins or CRM integration takes 4–6 weeks. Whatever the project, you get three fixed-price quotes within 24 hours of sending your brief, so the quoting part at least moves fast even if the build itself takes longer.
The developers matched to your project are Australian and vetted, but FindDevs doesn't have an office or staff in Mount Colah, and nobody is claiming past clients here. What you get is three developers picked for the brief you send, not the nearest postcode. For a commuter suburb like this, where most business happens over phone and email between train trips anyway, that's rarely a problem, and it means you're choosing from a wider pool of talent than whoever happens to have a shopfront nearby.
Fixed prices
Know the price before you talk to anyone.
These are published fixed-price builds, available to Mount Colah businesses like any other. No hourly rates, no discovery call before you can see a number.
Starter Business Website
$1,990
1–2 weeks
A sharp five-page website that makes a small business look established, live in a fortnight.
See what's includedProfessional Business Website
$4,950
2–4 weeks
The full small-business build: 8–12 pages, booking or quoting flows, and local SEO that actually ranks.
See what's includedLocal SEO Build-Out
$2,950
2 weeks
The ranking machine bolted onto your existing site: service pages, suburb pages, schema and reviews, done properly once.
See what's includedWebsite Care Plan
$190
Ongoing monthly
Hosting, updates, backups, security and monthly changes, all handled, so your site stays fast and safe without you thinking about it.
See what's included
Your industry
Developers who have built for your trade before.
The biggest employers around Mount Colah, by registered businesses in Hornsby. Each one has its own page, because a cafe site and a plant-hire site are not the same job.
Professional, scientific & technical services
3,192
local businesses
Web developers for this sector
Construction
2,195
local businesses
Web developers for this sector
Rental, hiring & real estate
1,561
local businesses
Web developers for this sector
Health care & social assistance
1,420
local businesses
Web developers for this sector
Related pages
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