1. The DGI price reference: what it really is
The property price reference is an internal assessment-aid tool. It allows the administration to quickly situate a declared price against the levels observed on average in a geographical sector, for a given property type. Its real function is that of a risk indicator: when the deed price departs markedly from the area average, the transaction is likely to attract attention.
What it is not: an enforceable pricing grid that would fix, property by property, the value to declare. The legal and professional reference remains the market value — the Market Value within the meaning of the international standards (IVS 104), i.e. the amount at which the property would exchange between a willing buyer and a willing seller, under normal conditions.
2. Why an area average does not make a value
The problem with the reference is not that it is wrong: it is that it is average. Yet no property is average. An average by sector aggregates heterogeneous transactions and precisely erases the factors that make the value of a specific property:
- Condition and wear — a property to renovate, with heavy works to plan, is not worth the average price of a renovated property in the same area.
- Floor and exposure — dark ground floor or top-floor through-apartment: same surface, same building, very different values.
- Configuration and features — functional or poorly laid-out plan, view, nuisances, lift, parking, condominium charges.
- Legal situation — joint ownership, occupation, ongoing lease, or absence of a land title: as many discounts as the average ignores.
- Atypical character — land, riads, properties with strong buildable potential: few comparables, hence an average of little relevance.
This is the fundamental distinction between market value and observed price: a single price level, or an average, is never a reference for a given property. The expert builds a sample of real comparables and applies reasoned adjustments (surface, floor, condition, situation), where the reference merely adds up and divides.
3. How the reference intervenes in a transaction
In practice, the gap to the reference is one of the signalsthat may trigger the administration's scrutiny of the declared price — just like an implausible capital loss, a sale between relatives or a hard-to-compare property. If the administration considers the deed price lower than the market value, it may notify a reassessment on a revised value.
The essential point: once the notice is received, it is up to the taxpayer to demonstrate that their price reflected the reality of the property. The reference has set the cursor; it is up to you to prove, with supporting evidence, that it does not correspond to your property. Without a built file, the exercise is difficult — especially months or years after the sale, when the buyer may have renovated and the market has evolved.
4. The market value appraisal: the methodological antidote
Where the reference gives an anonymous average, the independent appraisal report gives a reasoned, dated and traceable value of the specific property. That is exactly what the reference lacks:
- Observation of the real condition — visit, photos, wear, defects, works to plan: the discount justified by condition, which the average does not see.
- Verified surfaces — real surface, weightings (terraces, outbuildings), instead of a declared surface applied to an average price.
- Documented and adjusted comparables — genuinely comparable transactions (standing, floor, condition, situation), not an area aggregate.
- Explicit methodology — comparison, income or cost approach depending on the property, in line with the structured content of a proper appraisal report.
- Reference date — the value is set at the date that matters: that of the transfer.
A report compliant with RICS (Red Book) standards, produced by RICS-certified experts, draws its strength from its traceability: sources, comparables, adjustments and method are made explicit, signed and engage the appraiser's responsibility. That is what allows you to oppose a reasoned value to a mere reference gap.
5. Before the sale: document so you never have to contest
The best response to the reference is built before signing, while the property is still accessible and the market observable. An upstream appraisal:
- Sets a defensible market value at the date of the sale, and provides a reference price for the negotiation.
- Justifies a possible discount (condition, urgency, configuration, legal situation) by a dated observation rather than an after-the-fact assertion.
- Strengthens the declarative file, alongside proof of the acquisition price and of the works.
To go further, remember that the notary secures the deed; they do not establish the property's market value. That role belongs to the independent expert.
6. After a notice: the contradictory appraisal
If a value based on the reference is already opposed to you, everything plays out in the written response and, where applicable, before the appeal commissions. The contradictory appraisal report is its key document:
- Reconstruct the real value at the date of the transfer — condition of the property at the time, photos, works estimates: everything that justifies a price below the sector average.
- Dismantle the average logic — show that the property is not representative of the retained area (floor, condition, situation), so the average is not applicable to it.
- Structure the defence memorandum — a RICS-compliant report, dated, signed and methodologically explicit, carries different weight from a verbal contestation.
7. Reference or appraisal? What to remember
- The reference is a benchmark, not a norm: an area average that signals a gap, without fixing your property's value.
- The market value remains the reference: it is that, and not the average, which must determine what the property is worth at the date of the transfer.
- The burden of demonstration falls on you: a documented file — ideally before the sale — turns a reality (condition, discount, atypical character) into an admissible argument.
- The RICS appraisal is the right tool: reasoned value, real comparables, explicit methodology, from 3,500 MAD excl. tax, report within 5 to 8 days (48-72 h express).
One clarification: a private appraisal documents and defends your position in a negotiation or a procedure; it is not intended to replace a judicial appraisal, where the judge appoints the expert. Its strength is to support your argument upstream, where it carries the most weight.
8. FAQ
Is the DGI reference public?
It is primarily an assessment-aid tool used internally by the administration. For the taxpayer, what matters is not accessing it line by line, but being able to demonstrate the real market value of their property — which only a documented appraisal allows. Confirm the applicable terms for your situation with your notary or a tax adviser.
My price is below the reference but it is the real sale price. What should I do?
Document the reality of the property: condition, floor, works to plan, legal situation, and genuinely comparable transactions. An independent appraisal compliant with RICS standards turns this reality into a defensible file, whether upstream of the declaration or in response to a notice.
Is an appraisal enough to have a reassessment cancelled?
No result can be guaranteed: the administration, then the appeal commissions, retain their power of assessment. But a RICS-compliant report, dated, signed and methodologically explicit, is the document that gives the file the most weight in observations then in appeal — far more than an undocumented contestation.
How much does an appraisal cost to contest the reference?
From 3,500 MAD excl. tax depending on the property type, its location and the complexity of the assignment, with a report compliant with RICS standards delivered within 5 to 8 days (48-72 h express). Firm quote within 24 h. It is out of all proportion with the stakes of a reassessment suffered without a file.
Is it better to appraise before or after the sale?
Before, as much as possible: the property is still accessible, the condition can be observed, the market is observable, and the market value is set at the date that matters. After a notice, the expert reconstructs the retrospective value at the date of the transfer from the comparables of the time — more demanding, but exactly the work carried out in a contradictory appraisal.
A reference gap opposed to you? Document the real value.
RICS-certified experts — market value report before the sale to secure your price, or contradictory appraisal in response to a notice. Reports compliant with RICS (Red Book) standards, everywhere in Morocco.
Note: This article presents, for information purposes, the indicative nature of the administration's price reference and the place of the market value appraisal. The terms of assessment, deadlines and remedies fall under the applicable regulations: confirm your situation with a tax adviser or your notary. To document the market value of your property, see our real estate appraisal service or the real estate blog.