Selling property in Kaiseraugst: new zoning code, low tax rate

Anyone selling in Kaiseraugst will find no official price figure. The Canton of Aargau keeps no median prices by municipality; the Canton of Zurich does. What portals quote for Kaiseraugst are asking prices, not prices paid.

What is on record is the stock: Kaiseraugst has 759 buildings with residential use in the Rheinfelden district. 502 of them are single-family houses, or 66.1%. The cantonal figure is 65.9%. Kaiseraugst ranks 11 of 14 in the Rheinfelden district. In total, Kaiseraugst has 2,828 dwellings. 34.5% were built before 1981, against 51.8% in the canton. 38.7 hectares of 183 hectares of building zone are undeveloped, or 21.2% (as of 2022). For the share of undeveloped zone, Kaiseraugst ranks 9 of 196 in the canton.

What your house in Kaiseraugst is worth follows from comparable sales, the plot and its condition. The free assessment provides a written range with its explanation.

Kaiseraugst has enacted a new building and zoning code. Public consultation, preliminary review and public inspection ran from 2019 to 2022. The municipal assembly adopted the code in 2023 and 2024. The cantonal government approved it on 19 November 2025, which brought it into force.¹² It replaces the 2003 code and zoning plan and the 1989 farmland plan.¹² Only one area marked on the zoning plan stays under the old rules for now.¹² For sellers, most plots now follow freshly set zoning rules.

The new code contains no municipal rule on a value-capture levy.¹² Nor does the municipality’s list of regulations include a separate one.¹³ Cantonal building law therefore applies: 20 per cent of the gain when land is zoned for building.¹⁴ Selling a house on a plot that has not been newly zoned is not affected.

On the tax rate, Kaiseraugst ranks second of 196 municipalities in Aargau. For buyers, that is a tangible argument. Low taxes and newly settled zoning make Kaiseraugst attractive for a sale.

In Kaiseraugst, 262 of 759 buildings with residential use date from before 1981. That is 34.5%. Among the 196 municipalities in the canton, that is rank 176, counting from the highest share. In the Rheinfelden district: rank 14 of 14. Kaiseraugst therefore has a lower share than the canton at 51.8%. Compared with Kaiseraugst, the figure in Rheinfelden is 63.0%.

In Kaiseraugst, oil or gas heats 384 buildings with residential use, 50.6%, against 51.8% in the canton. Among the 196 municipalities in the canton, that is rank 70, counting from the highest share. Oil and gas are less common in Kaiseraugst than the cantonal average.

Records of heating, roof and windows therefore belong in the sale documents for Kaiseraugst. For owner-occupied homes in Kaiseraugst, the imputed rental value and the maintenance deduction end on 1 January 2029.¹ Whether a renovation in Kaiseraugst still pays off first is covered in Renovate or sell.

Kaiseraugst has 5,985 residents. 1,179 of them, 19.7%, are 65 or older, against 19.5% in the canton. Among the 196 municipalities in the canton, that is rank 98, counting from the highest share. In the Rheinfelden district: rank 11 of 14. Compared with Kaiseraugst, the figure in Rheinfelden is 21.9%.

On 1 June 2026, 18 homes in Kaiseraugst were empty, 0.64% of the stock, against 1.05% in the canton. Among the 196 municipalities in the canton, that is rank 73, counting from the lowest vacancy. In Kaiseraugst, rented and owned homes are counted; the figure does not show how many houses are for sale.

The municipal tax rate of Kaiseraugst is 50%. Among the 196 municipalities in the canton, that is rank 2, counting from the lowest tax rate. It applies to income and wealth; the municipality atlas compares all municipalities. By public transport, Zurich HB is 77 minutes away from the Kaiseraugst stop, with 1 change.

In Aargau, property gains tax falls with every full year of ownership. The rate drops from 40 per cent in year one to 5 per cent after 25 full years.² After more than ten full years, a house gets at least a flat-rate cost deduction: 80 down to 65 per cent of the sale price.³

If you sell your permanent and exclusive home, you can apply to defer the tax.² You must buy or build a new Swiss home within 2 years before or 3 years after the sale.² Only the reinvested proceeds are deferred.² Deferred does not mean waived: the next taxable sale also taxes this gain.²

Aargau has no classic transfer tax. Instead, the canton charges a land register levy (Grundbuchabgabe) on every sale: 4 per mille of the price.⁴ Buyer and seller are jointly liable; the law does not say who bears it.⁴

Only an Aargau notary (Urkundsperson) may notarise the sale contract.⁵