Sole agency agreement with an estate agency: clauses, duration and how to terminate it

What sole agency means in practice

In the sales instruction note or agreement, the sole agency clause prevents (or penalises) you from listing the property on portals yourself, hiring another agency, or completing a sale with a buyer introduced by a third party without paying the agreed fees.

A non-exclusive mandate is more flexible, but the agency may invest less in marketing. Sole agency aligns incentives: the agency commits time and budget because it has a protected window to recoup its investment.

Guideline legal basis

The relationship fits within the agency mandate rules of the Civil Code: the agent (agency) must act according to instructions and the principal (you) fulfills what was agreed regarding fees and cooperation. In consumer contracts, the Recast Text of the General Law for the Defence of Consumers and Users (TRLGDCU) limits unfair or opaque clauses.

Regional regulations governing estate agents may require minimum information in the sales instruction. If a clause seems opaque to you, request a written explanation or a legal review before signing.

Typical duration and extensions

Market norms usually involve periods of several months (three, six, or more), with automatic extension if prior notice is not given. There is no single legal duration: it is negotiable.

Ask explicitly:

• Start and end dates.
• Whether there is a tacit extension and how many days' notice you need to give to avoid renewal.
• What happens to portal listings when the contract ends (removal of photos and details).

Fees and "protected buyers"

Sole agency is almost always linked to commission fees based on the sale price if the transaction closes within the agreed period, even in some cases where you find the buyer yourself. The client protection clause creates the most disputes: it defines whether a viewer from two months ago is still considered "the agency's client".

Read the entire section. If it is too broad (anyone inquiring about the property within six months), negotiate time limits or exclusion lists (documented prior contacts).

What a good sole agency contract usually includes

1. Identification of the property and owners.
2. Asking price and scope for adjustments agreed with you.
3. Marketing breakdown (portals, social media, internal database).
4. Regular viewing reports and feedback.
5. Fees, VAT, and payment timeline.
6. Mutual or unilateral exclusivity (whether the agency can discontinue service early).
7. Confidentiality and data protection.
8. Grounds for early termination.

How to terminate sole agency

This will depend on what you signed:

• End of term with prior notice: the cleanest method if the contract is not renewed.
• Breach of contract by the agency: failure to publish, incorrect price, failure to arrange viewings. Document emails and messages.
• Mutual agreement: written cancellation with no outstanding fees if no sale occurred.
• Penalty clause: some contracts provide for compensation if you terminate early without cause. Check whether it is proportionate.

Terminating verbally and listing on another portal the next day is a common source of fee claims. It is better to send a registered recorded letter (burofax) or email with acknowledgment of receipt, alongside coordinated removal of listings.

Sole agency vs results

Sole agency does not guarantee a sale within a set timeframe. If there are no qualified viewings, review the price, condition of the property, and execution of the marketing plan before blaming the contract alone. On our blog, we look in detail at my property is not selling and how long it takes to sell a property without inventing universal timelines.

Relationship with the sales instruction note

Sole agency is usually a section within the sales instruction note. Do not sign one without reading the other. If you are comparing agencies, use criteria on how to choose an estate agency to sell before committing to months of exclusivity.

Warning signs to negotiate before signing

• Long duration without minimum activity metrics (viewings, progress reports).
• High fees with generic, unspecified marketing.
• Buyer protection clause with no time limit.
• Inability to terminate unless a sale occurs.

A clear mandate protects both parties. If you are looking for a sale with a full marketing plan and follow-up in Madrid, Valencia, Mallorca or Zaragoza, at Sky Real Estate we handle mandates for property sales and marketing.