Fixed Price Guarantee

A fixed-price guarantee is a contractual assurance from a developer, prefabricated home manufacturer, or general contractor that the agreed-upon total price for a construction project will be honored regardless of increases in construction costs, material prices, or labor rates. This means the homeowner bears no financial risk for unforeseen price increases during the construction phase.

Content and Scope of a Fixed-Price Guarantee

A fixed-price guarantee is only as good as its contractual terms. Prospective buyers should carefully review the fine print:

What a genuine fixed-price guarantee means:

• The total price stated in the contract is adhered to
• No additional claims by the contractor due to increases in construction costs
• Applies to all services described in the scope of work

Typical exceptions and pitfalls:

Exception	Meaning
Construction work “based on measurements”	Quantities are measured retrospectively; price risk lies with the buyer
Soil risk / soil excavation	Soil conditions are often explicitly excluded
Special requests / changes to specifications	Additional charges are always borne by the buyer
Construction cost index clauses	Some contracts allow for adjustments in the event of extreme inflation
Unforeseen defects in existing structures	Often explicitly excluded in renovation projects

Fixed-price guarantees are particularly difficult to provide for renovation projects, as surprises in existing structures (hazardous materials, dilapidated pipes, unknown construction details) occur regularly.

Fixed-Price Guarantee When Buying from a Developer

When purchasing a new-construction property from a developer, the purchase price is generally protected by law: According to the Real Estate Broker and Developer Ordinance (MaBV), the developer may only demand payments in fixed installments corresponding to the progress of construction, but may not subsequently increase the price. Nevertheless, buyers should pay attention to the following points:

• Is the price truly all-inclusive and exhaustive, or are there price reservations?
• Are development costs, outdoor facilities, the kitchen, and special features included?
• Is there an indexation clause (construction cost index)?

Fixed-Price Guarantee vs. Unit Price Contract: Understanding the Differences

In construction law, there are essentially two contract models:

Fixed-price contract: The contractor assumes the quantity and price risk for the work described in the scope of work. A true fixed-price guarantee is based on a fixed-price contract. The downside: To cover the risk, contractors calculate more generously-the fixed price is often higher than a unit price quote.

Unit-price contract: Individual items are calculated using a unit price (e.g., euros per square meter), and the actual quantity is measured upon completion (as-built survey). This model is more transparent but does not provide a price commitment for the entire project.

For private builders without construction experience, a lump-sum contract with a genuine fixed-price guarantee is generally preferable because it limits the financial risk of the construction project. The slightly higher price is the “insurance premium” for planning security.

What buyers should look for when reviewing a fixed price

Not every fixed-price guarantee delivers what it promises. Buyers should systematically check the following points before signing a contract:

Completeness of the scope of work: Are all trades and services clearly listed? Typical omissions include: earthwork, landscaping, connection costs (electricity, water, sewer), kitchen, lighting, and special request items.

Soil survey: Has the soil been tested? For properties without a soil survey, soil-related risks (contaminated sites, difficult subsoil) are usually explicitly excluded from the fixed price.

Price escalation clause: Does the contract contain a clause allowing for a price adjustment if a certain construction cost index is exceeded? Such clauses effectively undermine the fixed-price guarantee.

Warranty provisions: How long does the warranty last after acceptance? According to Section 634a of the German Civil Code (BGB), a 5-year period generally applies to buildings-this can be extended or shortened in the developer contract.

References and Creditworthiness: The fixed-price guarantee is only as good as the contractor’s liquidity. Check the financial stability of the developer or general contractor-bankruptcies during the construction phase pose significant problems for building owners.

Practical Tip for Homeowners in Nuremberg and Franconia

We recommend that buyers of new construction projects in the Nuremberg metropolitan region-whether in Lichtenreuth, Feldkirchen, or the new development areas in the Nürnberger Land district-have the construction contract reviewed by an independent building expert or attorney before signing. A purported fixed-price guarantee riddled with numerous exceptions offers the buyer little protection.

The German Consumer Association (vzbv) and the Bavarian Consumer Advice Center offer sample checklists for construction contracts. We help you identify reputable developers offering genuine price certainty-and, based on our experience in the metropolitan region, can assess which developers deliver reliably and which take risks with overly tight budgets.

Frequently Asked Questions

Does a fixed-price guarantee also apply to work performed by the homeowner?

No. Fixed-price guarantees always refer to the services to be provided by the contractor. Work performed by the homeowner (labor contribution) is not covered by this-its costs depend on your own effort and material prices. In addition, work performed by the client should be carefully coordinated with the contractor, as unauthorized interventions can jeopardize the warranty claim.

What happens if a developer demands more money despite a fixed-price guarantee?

If the fixed price was clearly agreed upon in the contract without restrictions, the developer has no claim to additional payments. In the event of a dispute, the buyer can insist on fulfillment at the agreed-upon price. In this case, consult a lawyer specializing in construction law-the Nuremberg Bar Association can provide recommendations.

Are fixed-price guarantees also available for renovation projects?

Only to a limited extent. Reputable contractors can only guarantee fixed prices for clearly defined and fully documented services. For renovations of older buildings, a budget buffer of 10-20% for unforeseen expenses is always advisable. Where hazardous materials, dilapidated pipes, or unknown structural elements are discovered, additional costs are unavoidable-no reputable contractor can cover these in a fixed price.

How large should a cost buffer be when building without a fixed-price guarantee?

When building under a unit price contract or during renovations, we recommend a cost buffer of at least 10 to 15% of the budget for unforeseen additional work. For renovations of existing buildings in older Wilhelminian-style houses or historic buildings, the buffer can rise to 20 to 25%-the older the building and the fewer existing documents available.

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