How this unit prices vs. the model and the surrounding 00520 market.
Asking is 2.5% below predicted
Asking price
€138,000
€7,077/m²
Predicted price
€141,552
€7,259/m²
Implied savings
−€3,552
vs. model estimate
Where this listing sits in the market
00520 · asking vs. predicted €/m²
Asking €7,077/m²
Predicted €7,259/m²
€4,138/m²€6,874/m² (median asking price in this postcode)€10,297/m²
Recent quarterly €/m² trend · 00520
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Postcode median €/m²This listing's asking €/m²
Market context
How this listing compares to recent activity in 00520 Alppiharju — actual sold prices, typical seller flexibility, and how long listings sit before they close.
Days on market
86 days
Counted from when we first observed the listing, capped at our tracking window.
Median for 00520: 139 days (n=75).
Typical negotiation in this postcode
-5.2%
Average sold-vs-asking gap across 42 matched sales in 00520.
Implied close on this listing: €130,885.
Price changes during this listing
2026-08-18
€138,000
→€119,000
-13.8%
(-19,000 €)
Comparable realised sales · 00520
2 within ±30% size
Sold
Size
Asked
Sold price
€/m²
vs ask
2025-10-18
18 m²
€114,000
€90,000
€5,000
-21.1%
2025-09-20
25 m²
€148,000
€140,000
€5,600
-5.4%
What the model considered
24 features · gradient-boosted regression
Predictions come from a non-linear XGBoost ensemble trained on a rolling 365-day window of Helsinki listings — not a postcode median with per-feature adjustments. Below are the values the model received for this unit, with each feature group's typical training-set importance.
Predicted
€141,552
€7,259/m²
Postcode reference
Median asking price in 00520 Alppiharju: €6,874/m²
· this unit asks €7,077/m²
The median asking price of the listings still online in this postcode, after each postcode’s outliers are trimmed back to its interquartile fence. It is a reference, not a model input: the model reads its own training encoding of the postcode, which is clamped and can differ.
Floor area
19.5 m²
Very high
Room count
1 room
Very high
Postcode
00520 · Alppiharju (asking median €6,874/m²)
High
Condition
Good
High
Year built
1939
High
Pipe renovation
Completed 2004
High
Monthly fee
€255/mo
High
Floor in building
3 / 4
High
Land ownership
Own plot
Moderate
Elevator
No
Moderate
Sauna
No
Moderate
Balcony
No
Moderate
Importance is the typical share of model gain attributed to each feature group across the training set. The actual contribution to this specific prediction would require running SHAP on the live model.
Pipe renovation
Linjasaneeraus is the largest building-system replacement a Helsinki housing company performs — typical cost €25–55k per unit and often shifts the asking price.
Pipe renovation completed 2004
No imminent assessment expected; the cost is already absorbed into the asking price.
Building & title
Quick reference for things that move the price beyond size and location.
Apartment
Floor
3 / 4
Condition
Good
Energy class
—
Balcony
No
Sauna
No
Building
Year built
1939
Total floors
4
Elevator
No
Title
Land
Own plot
Pre-emption
Not reported
Deal economics
What you actually pay, what a realistic close looks like, and what a buyer can expect to earn from rent.
Cash at signing
€
Selling price
€138,000
Transfer tax (1.5%)
€2,070
Admin / drafting fee (est.)
€380
Cash needed
€140,450
Monthly running costs
€/mo
Total housing-company fee
€255
Implied annual
€3,060
Realistic close estimate.
Sales in 00520 settle
5.2% off ask
on average (42 matched sales).
At that rate, this listing closes near
€130,885
(cash incl. tax + admin: €133,229).