Search results are primarily ordered by relevance to your query, with documented guardrails for near-duplicates and diversity. Here is how that works, in plain language.
This document describes the scoring model published on 3 July 2026. Production has changed since then, including the embedding model, hybrid retrieval and ranking guardrails; see the changelog below for later releases. This is a dated technical reference, not a line-by-line description of the current production code.
Published 3 July 2026 · historical reference · print to PDF
Results are ranked by: relevance to your search description (semantic match), location fit, price fit compared to your budget and commune market data, commute time when you have set a workplace, and your own behaviour (listings you dismissed rank lower for you). Each signal is weighted; if a listing is missing a signal the remaining signals are reweighted — no factor is silently treated as zero.
Payment. There are no paid placements, no boost packages, no advertiser preference, and no commission-linked ranking. An agency on the free tier ranks by exactly the same rules as one on the Agency plan. If that ever changes, we will announce it publicly here before it takes effect.
If a listing has no coordinates, location fit is skipped and the remaining signals carry the full weight. If you have not set a commute target, commute is not used. Missing data is never treated as a negative signal.
Listings you dismiss rank lower in your personal results. This personalisation is per-user and private — it does not affect what other users see, and it does not influence the ranking for agencies or other listings in any way.
Found inaccurate, duplicated, or misleading information? Use the contact form — select 'General question' and describe the issue. We review within 2 working days.
Report a problemAgent or user — if you believe a result is wrong, contact us. We will explain the exact signals that produced the ranking for that query.
Ask about a rankingThe full ranking algorithm lives in our code repository, which is open to review on request. Email hello@chathome.lu for access, or with any questions about the methodology.
Any change to ranking rules is documented here with a plain-language explanation.
Follow-up refinements now apply atomically: a request is either fully understood and validated or leaves the ranking plan and results unchanged. Empty, no-op, conflicting, unsupported or oversized refinements are explained precisely instead of partially changing results. Combined bedroom-and-budget requests retain every supported criterion, transport wording cannot become a price constraint, and a location answer clears incompatible location filters. Find My Fit now ranks only active residential listings in the chosen buy or rent mode, within a disclosed sample limit. Search explanations now count only requirements proven by source-bound facts; unknown, dropped or unapplied criteria are shown instead of being called a complete match, and model-only lifestyle scores no longer contribute to public ranking reasons.
A place extracted as a proximity or commute destination now consistently uses its explicit or default travel radius instead of also restricting results to that place as a residence. This prevents nearby qualifying homes from being hidden and removes language-specific keyword shortcuts from the decision. When a search explicitly asks for a dwelling subtype such as a penthouse, the listing must now provide evidence of that subtype instead of matching through its broader parent category alone. Property type is now applied when the database selects candidates, rather than afterwards, so a search for houses draws on every matching house instead of filtering a mixed sample — many more qualifying homes now reach the results. Filtered searches can also be sorted, including by price; homes without a published price are left out of price-sorted views rather than grouped at one end. The result count now describes how many homes match in total, shown as an approximate figure, instead of how many were examined. A search broad enough to match a large part of the market now offers a few narrowing questions first.
Explicit requirements such as energy class, minimum bedrooms, home type, space, condition, commute and all-in rental budget are now applied as verified constraints where evidence exists. Affordability is grounded in the buyer's stated finances, and missing or contradictory evidence is disclosed instead of treated as a match. Search now distinguishes Luxembourg the country from Luxembourg City and commute destinations from residence filters, retrieves more homes that meet price and bedroom constraints, and respects the ranking priority order stated by the user.
Searches that look like a specific listing reference, an agency name, or a street now run an exact-match lookup, so a pasted reference or a precise name surfaces the exact home at the top of the results. Ordinary descriptive searches are unaffected.
Confirmed cross-agency copies now occupy one place per result set and the representative rotates between requests. Distinct units from the same agency remain visible and are labelled as related; a shared origin identifier alone never hides them.
Trust guardrails tightened: implausible market comparisons no longer influence scores, low-relevance padding is removed once enough relevant homes exist, and locality membership is explained as membership rather than as distance to a commune centre.
Searches with several required commutes now evaluate every required journey: the weakest required commute determines commute fit instead of whichever journey looks best.
Vibe ranking now prioritises confirmed quarter matches, scores commute continuously, calibrates displayed match percentages, moves near-duplicates down, and adjusts semantic versus keyword retrieval weight to the query's specificity.
Personalisation added: listings a user has dismissed rank lower in that user's results only. No effect on agency ranking or other users.
See the ranking in action
Describe what you are looking for and see how results are ordered by these rules.