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Freelance developer for real estate and property development

Web development for real estate agencies

I design and build websites for real estate agencies, property developers and property managers in Belgium.

5.0
15 years of experience
The problem

Most estate agency websites are a decade behind

For your clients, sellers and buyers alike, the first viewing happens online.

Every agency promises the same thing.

Free valuation, professional photos, listings on the portals. A seller weighing up several agencies opens as many tabs and reads the same text in every one of them.

Your properties look worse online than they do at the viewing.

Photos squeezed into a template, descriptions copied from the portal, no room to talk about the neighbourhood. A property that looks mediocre on screen is a viewing that never happens.

Your forms mostly send you browsers.

Vague budgets, out-of-area requests, Sunday browsers. An "I'm interested" form filters nothing: it leaves you doing the sorting your site should have done for you.

You rent your visibility on other people's sites.

Immoweb, Zimmo, Immovlan: several hundred euros a month for an audience that will never belong to you. The day you stop paying, you disappear.

The solution

A website that presents your properties and sorts your enquiries

It works in the evening and at weekends, when your future clients are looking.

With this new website, you bring in more leads.

And the image you project matches the work you do at a viewing.

A brand that reassures before the meeting.

Your story, your completed sales and your clients' words, placed at the right point in the journey. The seller walks into the meeting already trusting you. The commission gets argued over far less.

A catalogue that shows your properties at their best.

Every property gets a real page: large-format photos, the neighbourhood properly told, instant loading. Your mandates come across online the way they come across at a viewing. And your sellers see exactly how their property will be treated.

Enquiries that arrive already qualified.

Project, budget, timeline: the forms ask the right questions before your phone rings. Each enquiry lands complete in your CRM, with its source. Your team calls back buyers, not browsers.

Pages that answer the searches in your municipality.

Pages for each municipality and each property type, matching local searches on Google and in AI answers. Those pages belong to you and gain value every month, instead of being rented like a slot on a portal.

What my clients say

SME owners with the same need as you: a site that matches what they sell.

Sébastien is always attentive and understood our needs perfectly when it came to redesigning our website! The new site looks great and was delivered on time. We've already gained a few customers thanks to the improved SEO of the new site
Didier Boulvin

Didier Boulvin

Coddy

Numinam's contribution to the development of our App has been significant in its success with our B2C and B2B customers.
Stephane Draux

Stephane Draux

Founder • Spengo

Numinam (One More Pixel) is doing a fantastic job for Euronet. They’ve started the mission in saving our web-site from a cyber-attack. We had lost a lot of information and they had to rebuild our web-site. They had to recover the data left on our…
Valérie Van Belle.

Valérie Van Belle.

Managing director • Euronet

At Nallian we build solutions that are trusted by the world's leading airports, ground handlers and logistics companies. But our website no longer reflected that level of excellence. This redesign ensures our first impression matches the quality of…
Jean Verheyen

Jean Verheyen

CEO • Nallian

The new website much better reflects who we are. It tells our story more clearly, it's easy to navigate, it looks fresh and modern. It is more Nallian.
Joke Aerts

Joke Aerts

Director of Marketing • Nallian

Numinam's technical and design vision has enabled us to improve our lead generation flows. A big step forward.
Jérôme Van De Sande

Jérôme Van De Sande

Product & Data Leader • Heat Me

Numinam has completely modernized our website. The design is clearer, more credible, and our visitors understand what we do. A real leap in quality. Also worth noting is the excellent collaboration between Numinam and our development agency. Thank…
Olivier Lafosse

Olivier Lafosse

Founder & CEO • Heat Me

It was a real pleasure to do business with Sebastien. He did a great job and transform our inefficient and boring website to a nice one that generate leads. Moreover, Sebastien is a patient and reliable partner and he's always ready to help.
Shirley Boterdael

Shirley Boterdael

Marketing & Com. Manager • Highcodata

Over 15 years of experience, put to work on your project

You don't talk to a salesperson who reports to a project manager, who briefs a developer and a designer: all those people sit in front of you, in one person, from the very first meeting.

01 UX / UI design

from €595

Before a single line of code, we clarify your visitors' journey and the image you project. The design then does the work of reassuring people and guiding them towards action.

What's included

  • Research and scoping
  • Mockups and clickable prototype
  • Conversion-focused copywriting
  • Design system

What you get

  • Approved mockups
  • Navigable prototype
  • Visual guidelines

02 Lightning-fast website build

from €1,190

I build your site from scratch: it loads in under a second and turns visitors into quote requests. No template, no plugins to maintain, and code that is 100% yours.

What's included

  • Astro development
  • Loads in under a second
  • Google PageSpeed score of 95+
  • Responsive, with editable content

What you get

  • Site live
  • Code, domain and access (100% ownership)
  • Hands-on training

03 SEO / AEO / GEO

from €595

Your clients search on Google and ask ChatGPT. I structure your site so it shows up in both places, and I send you the ranking report so you can watch it move.

What's included

  • Technical SEO
  • Structured data
  • Optimised content
  • Rank tracking

What you get

  • Indexed, structured site
  • Ranking report
  • Content recommendations

04 Automation

from €595

Prospecting, reporting, follow-ups: I automate the tasks that eat your team's time, with or without AI. Measurable results within 4 to 6 weeks.

What's included

  • Process audit
  • n8n workflows
  • AI integrations
  • Connecting your tools

What you get

  • Workflows in production
  • Documentation
  • Hours won back every week

05 Follow-up and support

I don't hand over a project and vanish. Updates, optimisations, A/B testing and dashboards: I stay your partner for the long run.

What's included

  • Maintenance and updates
  • A/B testing
  • KPI dashboards
  • Ongoing optimisation

What you get

  • Regular reports
  • Measured improvements
  • A single point of contact

How we'll work together

At each step, you know what I do, what you approve and how long it takes.
100%
  1. 01 Scoping call and project setup

    We go over your goals, sort out the paperwork, and I show you the tools we'll be using together.
    5%
  2. 02 Mockups and validation

    I show you a custom mockup for you to pick apart before a single line of code is written.
    15%
  3. 03 Development

    I build your site: fast, and faithful to the design we approved. You get a live preview throughout.
    55%
  4. 04 SEO / AEO / GEO optimisation

    The site is ready, but it needs analysis and serious fine-tuning to prepare its arrival on the web.
    15%
  5. 05 Launch and training

    Go-live, tracking configured, your team trained on the back office.
    5%
  6. 06 Follow-up and optimisation

    3 months of support included, free of charge. Nobody does that.
    5%
Let's look at what the portals cost you.

Let's look at what the portals cost you.

25 minutes to look at your situation together: your Google rankings, what you pay the portals, what your website says about you today. You leave with a clear diagnosis, even if we never work together.

It's free, there's no commitment, and you get me directly on the phone. The developer you talk to is the one who will build your site.

Book my free 25-minute call

Frequently asked questions

How much does a custom real estate website cost at Numinam?

Three formats, always at €595 per working day. Landing page (2 days, from €1,190): one page to capture enquiries for a specific property or development. Showcase website (6 days, from €2,975): your agency online with a property catalogue your agents manage themselves and solid local SEO. Website with CMS (from 12 days, from €8,925): for groups or multi-agency setups, advanced SEO architecture, multilingual and integrations (CRM, neighbourhood pages). No platform subscription, and the code belongs to you. A 25-minute call is enough to scope your needs.

Can my agents manage the property catalogue without a developer?

Yes, that's the whole point. The admin interface is built for sales people, not developers. Adding a mandate with photos, price, surface area and location, updating a price, marking a property as sold: everything is done in a few clicks. The site updates instantly. Each listing automatically generates its own SEO-optimised page for the neighbourhood. During the mockup phase, I show you the admin interface before building it so your team can validate their daily tool.

Does the Numinam site integrate with Salesforce, HubSpot or our CRM?

Yes. I connect your site to your existing CRM: Salesforce, HubSpot, Pipedrive, or any other tool via API. Every form (contact, viewing request, valuation) automatically creates a qualified contact in your pipeline, with the relevant property and the source of the enquiry. No more manual re-entry, no more forgotten leads. If you don't have a CRM yet, I can advise on the best solution for your size and needs.

How does local SEO by neighbourhood work at Numinam?

The site is architected to capture geographic searches: 'apartment for sale Ixelles', 'office to let Etterbeek', 'house with garden Uccle'. Each neighbourhood has its own page, optimised with real estate Schema.org markup, location data and specific content. These pages are automatically enriched with available properties in the neighbourhood. The goal: appear at the top of Google when a buyer searches in your area, and be cited in AI answers from ChatGPT and Perplexity.

Can we keep Immoweb alongside the Numinam site?

Yes, and it's the recommended strategy to start with. The goal isn't to cut Immoweb overnight, but to build an exclusive lead channel that gains momentum. Your site progressively captures organic local traffic. Over the months, the share of direct leads increases and your portal dependency decreases. You decide the pace at which you reduce your portal spend based on concrete results.

How long before local SEO generates leads?

Local SEO is faster than general SEO. Well-optimised neighbourhood pages start appearing in Google results within 2 to 4 months for low-competition queries (specific neighbourhoods, precise property types). For more competitive queries ('apartment for sale Brussels'), expect 4 to 8 months. From launch, your optimised Google Business Profile generates visibility on Google Maps. SEO is a cumulative investment: each month, your positioning strengthens.

What happens if Numinam is no longer available?

The complete source code of your site lives in your own Git repository from day one, on standard open-source technologies, with the technical documentation delivered at launch. Developers I trust know the project and can step in.

What I cannot promise is being available forever; what I can guarantee is that my leaving does not block you.

Is team training included?

Yes. Training on the admin interface is included in every plan. Your agents learn to add properties, edit listings, manage photos and mark sales, usually in a 1 to 2-hour session. User documentation is also provided for future team members. The back-office is designed to be intuitive: if your team can use a standard management tool, they'll be able to use the interface from day one.

Does Numinam only work with Brussels-based agencies?

No. I am based in Brussels, but I work with agencies and developers across Belgium, and internationally in English. The neighbourhood and municipality page mechanics adapt to Liège, Antwerp or Luxembourg just as well as to Ixelles. Meetings happen over video or on site depending on where you are, and sites can be multilingual FR/NL/EN from launch.

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