Second Homes Act 2024: property potential begins with a date

In a tourist municipality, two neighbouring buildings may look alike yet carry very different rights. One existed before the 2012 vote; the other came later. The first may qualify as a home created under the former rules, but that status does not make an extension, subdivision or rebuild automatically permissible. The municipality, property history, floor area, use, project and cantonal law still need to be examined. Changes to the Second Homes Act effective from 1 October 2024 reopened practical questions for some owners. This briefing sells neither a permit nor an increase in value. It shows how an address and project become a documented preliminary assessment, why the 20% municipal threshold remains central, and which first service can be paid for without waiting for a property transaction. It also explains how a property manager, architect or specialist adviser can win new owner mandates without financing the works through its own cash flow. General analysis updated on 7 August 2026. It is not planning permission, an assessment of cantonal or municipal law, or legal or architectural advice.

The changes broaden the scope to extend, alter, demolish and rebuild certain homes created under the former rules, including additional dwellings within the statutory limits. They concern buildings predating the 2012 vote. They do not remove the planning-permission process or any other applicable rules.

Parliament adopted the amendment in March 2024 and the Federal Council set 1 October as its commencement date. The final scheme provides, among other things, for up to 30% more main usable floor area and greater flexibility in demolition and reconstruction. The applicable text and the specific project determine what is possible.

How to read the diagram. The home’s date and status come before any calculation of potential. Only then should territorial and construction constraints be applied to a project scenario.

Text alternative. The address leads to qualification under the former rules, then to checks on municipality, use, floor area and project before a preliminary view, study or stop decision.

The classic commercial error is to turn “up to 30%” into a value promise. A maximum says nothing about site geometry, local planning rules, protected interests, costs, easements or acceptability. It opens an analysis, not a permit.

The threshold remains decisive because municipalities above 20% are subject to the Second Homes Act restrictions and generally cannot authorise new second homes. The annual inventory can change a municipality’s position. Its status must therefore be checked at the date of analysis, not copied from an old brochure.

The Federal Office for Spatial Development publishes the inventory results each year. Municipalities and cantons verify data drawn from the Federal Register of Buildings and Dwellings. Crossing the threshold in either direction triggers a process; restrictions should not be inferred from a number in a property advertisement.

In 2025, seven municipalities newly exceeded the threshold and four moved back below it. The movements are small nationally but show why every territorial qualification needs a date. A manager operating across several municipalities cannot apply one factsheet to the whole portfolio.

A home falls under the former rules if it lawfully existed before the relevant constitutional date and meets the status defined by the Act. Apparent construction age is not enough. Permits, plans, use designations, registrations and later alterations must be reconciled, and uncertainty flagged before estimating floor area or value.

The file starts with the building register, land register, available permits, plans and municipal decisions. It traces changes of use, combinations, subdivisions and renovations. A converted barn, a dwelling created later or a mandatory use restriction may change the conclusion.

The first commercial deliverable can stop at this qualification. A specialist gathers available documents, lists gaps and identifies questions for the authority without designing the project. This saves an owner from funding plans based on a fragile assumption.

The 30% allowance is a maximum increase in main usable floor area in the situations covered, including certain demolition-and-rebuild projects. It is not an automatic entitlement or an equivalent rise in value. Permissible floor area, any additional dwellings and their use must be assessed with all project rules.

The flexibility may allow extra dwellings and, in some cases, relocation on the plot. But the pre-existing area, relevant building and use must be calculated correctly. Zoning, landscape, heritage, access, parking and energy constraints remain.

A preliminary assessment should offer scenarios rather than one number: retain and renovate; extend; subdivide; demolish and rebuild; or stop because no reasonable project exists. Each has its own unknowns, authorities and next cost. An owner can stop before a full study if the economics do not work.

Financial value comes later. A qualified expert may compare study and construction costs, timing, finance, rental income or exit price. getfishnet never presents theoretical floor area as realised turnover. The first observed revenue is the diagnostic paid to the partner.

The useful file links the property’s status, municipal threshold, existing floor area, use, constraints and a drawn scenario. It also lists questions that can be put to the authority. Its output is a decision to continue, amend or stop; it is neither permission nor a final valuation.

The property manager can coordinate documents; the architect tests spatial feasibility; legal counsel handles points of law; and the authority decides. A valuer or bank may follow. A concise summary should present status, scenarios, obstacles, open questions and the next budget, with sources and calculations in appendices.

Plausible buyers are owners of pre-2012 property, heirs, purchasers conducting due diligence and property managers prioritising a portfolio. The first purchase is prequalification or a portfolio audit, not a property sale. It can be paid promptly when scope, required documents and timing are clear.

The market is geographically concentrated. Data cited in Parliament indicates that 90% of second homes are in five cantons: Valais, Graubünden, Ticino, Bern and Vaud. This supports local prospecting and relationships with notaries, managers, architects and administrations, but does not reveal how many homes under the former rules are genuinely available.

Inheritance, renovation, sale, acquisition, family consolidation and portfolio review are stronger buying signals than ownership alone. The message should name the event and offer verification without assuming the owner wants to extend.

The Property and management market page compares this opportunity with energy and management decisions, which require different evidence and timescales.

Acquisition should promote a first service payable independently of any transaction: status qualification, document collection, portfolio audit or preliminary scenario assessment. Search, local content, referrers, focused email, professional calls and events can identify owners. A mandate counts only after the diagnostic has been paid.

How to read the diagram. A completed property transaction is unnecessary to validate the first revenue. The diagnostic can be useful even when the project stops.

Text alternative. An event leads to a preliminary-assessment offer. Once paid, it produces a decision; the project then closes or continues as a separate engagement.

Local content explains the method and answers searches. Referrers provide trust. Professional email and calls target managers, notaries and partners where their role is relevant; direct owner contact follows applicable data and communication rules. Targeting never rests on assumptions about wealth.

Follow-on work may include a feasibility study, planning application, works coordination, letting or a management mandate. Each requires an explicit decision and available expertise. The preliminary assessment must not be a misleading loss leader for a service the owner is then pressured to buy.

A manager may also buy a periodic portfolio audit as new assets arrive or the municipal inventory changes. Monitoring is useful only when it updates a decision. A regulatory newsletter alone does not justify substantial recurring fees.

Measurement separates paid diagnostics, commissioned studies, signed mandates and management fees. Sale, finance and construction times sit outside the thirty-day proposition. Before launch, the partner must confirm cash flow, capacity, margin and specialist availability.

A campaign should stop if the partner cannot qualify former status, promises permission, values an uplift without qualified expertise or relies on collecting a final sale fee. It should also stop when the owner market cannot be named, documents are inaccessible or study capacity is already full.

Before launch, getfishnet requires a sample report, entry price, timetable, escalation path and refusal criteria. The partner must distinguish its analysis from decisions made by an architect, lawyer, valuer or authority. Every channel must carry the same limits.

Economic potential remains modelled rather than observed until a new owner pays for the diagnostic. Floor area, property values and cantonal volumes are never counted as revenue. This discipline gives a modest but useful basis for choosing channels.

The free eligibility test examines your offer, area, owner market, first purchase and delivery capacity. It compares these with your current acquisition challenge to decide whether our services fit and whether a tailored strategy has a workable basis.

Authority sources include the Federal Office for Spatial Development, Parliament, Fedlex and municipal inventories based on the Federal Register of Buildings and Dwellings. They establish the timing, thresholds and mechanism. They validate no individual property or valuation.