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Construction and Works Contract Law

Building means ordering many interests in a confined space — those of the owner, the neighbours, the contractors and the authorities. We represent you in public permit proceedings as well as in disputes over remuneration and defects.

Homeowner and tradesman comparing a construction plan

What we do for you.

Building Permits and Objections

We accompany building applications, draft objections and represent you on appeal before the building department and the administrative court.
Handshake across a conference table with contract documents

Works and Contractor Agreements

Review and drafting of works contracts, architect and engineer agreements and general and total contractor agreements, including under SIA standard 118.
Tenant photographing damp on a window reveal

Construction Defects

Enforcement of rectification, price reduction and damages — for owners against contractors and for contractors against subcontractors.

Contractor's Lien

Provisional registration within the four-month deadline, follow-up proceedings and defence against unjustified entries.
Narrow footpath between two gardens

Neighbour Law and Nuisance

Noise, dust, shading or boundary distances: we clarify claims under neighbour law and negotiate with the other side.
Three flat owners studying a building plan in a stairwell

Land and Easements

Purchase and sale of building land and property, building-right contracts, easements and mortgage rights — including notarisation.

Public Construction Law: Permits, Objections, Appeals

Whether a project is admissible is decided by federal and cantonal law: the Spatial Planning Act requires a permit for buildings and installations (Art. 22) and distinguishes between building zones and non-building zones, where construction is allowed only exceptionally (Art. 24). The details — boundary distances, plot ratios, building heights, design — are set out in cantonal building and planning acts and in municipal building regulations. In our catchment area these are St. Gallen, Appenzell Ausserrhoden, Thurgau or Zurich, with noticeably different rules.

We review a building application for its prospects before it is filed, draft objections for affected neighbours, and pursue appeals where a decision does not hold — up to the administrative court and, where appropriate, the Federal Supreme Court.

Works Contracts, SIA Standard 118 and Planning Agreements

Under private law, building starts with contracts: the works contract (Art. 363 et seq. Swiss Code of Obligations), the architect and engineer agreement, the general or total contractor agreement. What matters is the scope of works, the remuneration model, deadlines and liability. Where SIA standard 118 is adopted, acceptance and time limits change considerably. We review drafts before signature and raise the points that count in a dispute.

Defects and the Contractor's Lien

If the work does not correspond to what was agreed, rectification, price reduction or rescission are available (Art. 368 Swiss Code of Obligations). The duties to inspect and notify are decisive: notify too late and you lose your rights. On the other side, the contractor's lien secures the claim for remuneration; the four-month registration period under Art. 839 Swiss Civil Code is a forfeiture deadline and tolerates no delay. We act in both roles — for owners and for contractors.

Neighbour Law and Nuisance

Building works create noise, dust and vibration; finished buildings take away light and views. Neighbour law requires excessive effects to be refrained from (Art. 684 Swiss Civil Code); the Environmental Protection Act and the Noise Abatement Ordinance apply alongside. We clarify what must be tolerated and what can be resisted, and look for a negotiated solution first.

Construction Law in Eastern Switzerland

We support owners, architectural practices, trade businesses and property owners from our offices in Wil SG, Teufen AR and Zurich — from preliminary clarification through notarisation of the property transaction to litigation.

Your contact persons.

Portrait of Jonathan Birbaum

Jonathan Birbaum

Attorney at Law and Public Notary
Portrait of Raphael Fisch

Raphael Fisch

Partner · MLaw & BA phil. — Attorney at Law and Public Notary
Portrait of Fabian Steuri

Fabian Steuri

Partner · M.A. HSG — Attorney at Law and Public Notary · Certified Specialist SBA Inheritance Law

Frequently asked questions.

When do I need a building permit?
All buildings and installations and their alteration or change of use require a permit where they affect the zoning regime (Art. 22 Spatial Planning Act). The details are governed by cantonal building acts; minor projects may be exempt or follow a simplified procedure. Building without a valid permit risks an order to demolish.
Who can object to a building project?
Anyone particularly affected by the project and with a legitimate interest in its annulment may object — as a rule the immediate neighbours. The objection must be filed and reasoned within the public display period; anyone who misses the deadline is no longer heard in later proceedings.
What is a contractor's lien?
Tradespeople and contractors who have supplied material and labour to a property may register a lien over it to secure their claim (Art. 837 Swiss Civil Code). Registration must take place within four months of completing the work (Art. 839) — this deadline cannot be extended.
How quickly must I give notice of a construction defect?
Under the Code of Obligations the work must be inspected after delivery and any defect notified immediately (Art. 367); hidden defects must be notified immediately upon discovery (Art. 370). If SIA standard 118 applies, a two-year notification period runs. Which regime applies is set out in the contract — so read it before you react.
How does SIA standard 118 differ from the statutory rules?
SIA standard 118 is not legislation but a set of pre-formulated contractual terms. It applies only if the parties adopt it. Among other things it alters acceptance, notification periods and the limitation of warranty claims, and in practice is often more balanced than the default rules on works contracts.
Who is liable if construction takes longer than planned?
What matters is whether a binding deadline was agreed and who is responsible for the delay. If the contractor is in default, a contractual penalty, damages or — after setting a grace period — withdrawal may apply. Delays caused by the authorities generally fall outside the contractor's responsibility.

Other practice areas.