In short
In 2025, the median price of a house in Watermael-Boitsfort is €599,000 (119 sales, 13% above the Brussels-Capital Region median), and that of a flat €335,000 (144 sales, 24% above the Brussels-Capital Region median). For a house at that median price, expect about €55,558 in purchase costs if it is your sole and own home.
Property professionals in Watermael-Boitsfort
One firm per profession, selected by Payotte on public data (2 of 4 professions filled in Watermael-Boitsfort). Companies, never individuals, with a title you can check with the official body.
| Profession | Firm | Google rating | Reviews | Score /100 | Status | Listing |
|---|---|---|---|---|---|---|
| Estate agent | Immo Fox | 5 | 37 | 79 | Selected | View |
| Mortgage credit broker | KB Consulting | 4.9 | 324 | 83 | Selected | View |
| Notary | Vacant | — | — | — | — | — |
| Chartered surveyor (géomètre-expert) | Vacant | — | — | — | — | — |
One firm per profession and per municipality, chosen on public data and scored out of 100 points — Google reviews (35), age of the company (30), checkable professional title (15), local presence (15), bonus (5). The ranking is never paid for. No firm can buy its place or its recommendation. How Payotte ranks firms
Calculate in Watermael-Boitsfort
The questions, answered
How much does a house cost in Watermael-Boitsfort?
In 2025, half of the houses sold in Watermael-Boitsfort went for less than €599,000; a quarter below €500,000 and a quarter above €800,000 (Statbel, 119 sales, resales only).
How much does a flat cost in Watermael-Boitsfort?
In 2025, half of the flats sold in Watermael-Boitsfort went for less than €335,000; a quarter below €269,000 and a quarter above €415,000 (Statbel, 144 sales, resales only).
Have prices gone up in Watermael-Boitsfort?
The median price of houses in Watermael-Boitsfort changed by -8% between 2024 and 2025, and by +52% since 2015 (€395,000 → €599,000), according to Statbel.
What are the purchase costs for a house at the median price in Watermael-Boitsfort?
For €599,000, purchase costs come to about €55,558 if it is your sole and own home (of which €49,875 registration duties), and €80,627 otherwise (of which €74,875 registration duties), notary and deed costs included.
What registration duties apply in Watermael-Boitsfort?
Watermael-Boitsfort applies the Brussels-Capital Region duties: 12.5% of the price, with an abatement on the first €200,000 for your sole and own home if the price is at most €600,000.
How much tax on the gain when you sell in Watermael-Boitsfort?
The rule is federal, the same in Watermael-Boitsfort as across Belgium. Your own home is not taxed on the gain, even when sold within 5 years, if you lived in it for 12 months without interruption. A second home sold less than 5 years after the purchase (dates of the notarial deeds) has its gain taxed at 16.5%; after that, the gain is exempt (Wikifin, FSMA). At the median prices in Watermael-Boitsfort (Statbel), a house bought in 2022 and sold in 2025 makes no gain.
Is Watermael-Boitsfort an expensive municipality?
For a house, Watermael-Boitsfort ranks 7th of the 18 municipalities Payotte covers here in 2025, from most to least expensive (Statbel).
Prices in 2025
| Type | Sales | Median price | 1st quartile | 3rd quartile | Regional median |
|---|---|---|---|---|---|
| Houses | 119 | €599,000 | €500,000 | €800,000 | €530,000 |
| Flats | 144 | €335,000 | €269,000 | €415,000 | €270,000 |
Median: half of the sales were below it, half above. A quarter of the sales are below the 1st quartile, a quarter above the 3rd. Statbel publishes no price below 16 sales.
The ten-year trend
| Year | Houses, median | Sales | Flats, median | Sales |
|---|---|---|---|---|
| 2016 | €439,500 | 123 | €212,500 | 102 |
| 2017 | €457,500 | 135 | €220,000 | 123 |
| 2018 | €469,500 | 126 | €245,000 | 110 |
| 2019 | €500,000 | 117 | €250,000 | 129 |
| 2020 | €515,000 | 103 | €280,000 | 97 |
| 2021 | €561,000 | 118 | €275,000 | 142 |
| 2022 | €627,500 | 129 | €289,500 | 142 |
| 2023 | €650,000 | 116 | €290,000 | 149 |
| 2024 | €649,000 | 122 | €296,000 | 127 |
| 2025 | €599,000 | 119 | €335,000 | 144 |
The latest quarters
| Quarter | Houses | Sales | Flats | Sales |
|---|---|---|---|---|
| Q3 2025 | €547,500 | 26 | €336,500 | 46 |
| Q4 2025 | €585,000 | 33 | €300,000 | 29 |
| Q1 2026 | €585,000 | 31 | €312,500 | 38 |
| Q2 2026 | €747,250 | 29 | €290,000 | 36 |
Sources
- Prices: Statbel, real estate prices (based on the sale deeds of the FPS Finance), licence CC BY 4.0.
- Purchase costs: rates and sources of the calculator.