Residual Method (VPGA 10) for development land in Morocco — a valuation guide

Development land is worth what remains after a viable scheme has paid for its construction, its finance and its developer's profit. This guide explains when the residual method applies in Morocco, how the planning parameters (COS, CES) drive the programme, where each input comes from, and why the sensitivity table is the most important page of the report.

When the residual method is the right tool — and when it is not

The RICS Red Book Global Standards 2025 addresses development property in VPGA 10 ("Valuation of development property"), supported by the RICS guidance note on valuing development land. The core principle: development property should be valued by the residual method — gross development value (GDV) minus all costs of realising it, minus the developer's required profit — cross-checked against the comparison method (prices per square metre of land evidenced by comparable plot sales) wherever comparable evidence exists.

• Use the residual when the land's highest and best use is development or redevelopment, and its value depends on the specifics of the scheme it can carry: urban infill plots, zoned extension areas, obsolete buildings whose land value exceeds their existing-use value.
• Do not rely on the residual alone where an active plot market provides direct evidence — in many Moroccan urban zones, land trades per square metre with observable frequency, and the comparison method carries primary weight, with the residual serving as the viability cross-check.
• Never use the residual as a negotiation prop. A residual built on the buyer's hoped-for programme rather than the legally permitted one is an advocacy document, not a valuation.

Step 1 — the programme: what the plot can legally carry

In Morocco the development envelope is set by the plan d'aménagement and its zoning regulations, summarised for a given plot in the note de renseignements urbanistiques. Two parameters do most of the work:

• COS (coefficient d'occupation du sol) — the floor area ratio: buildable floor area as a multiple of plot area. In typical urban residential and mixed zones we commonly see COS parameters in the region of 1.5 to 2.0, though the range across zones is wide — from well below 1 in low-density villa zones to higher values on structuring axes and in high-rise zones.
• CES (coefficient d'emprise au sol) — the site coverage ratio: footprint as a share of plot area, commonly in the region of 0.4 to 0.6 in ordinary urban zones, again varying by zone and building typology, alongside height limits (number of storeys), setbacks and parking requirements.

The valuer's first task is programme optimisation within these constraints: the mix (residential floors over ground-floor retail is the classic Moroccan urban programme), the sellable-to-built ratio after circulation and structure, parking (surface or basement — a major cost switch), and phasing. Two plots with identical areas and different COS are different assets; a plot whose note de renseignements is expired or ambiguous is a risk item, not an assumption.

Step 2 — gross development value

GDV is the aggregate market value of the completed units — apartments, retail walls, offices, plots in a subdivision (lotissement) — priced from current comparable evidence in the same micro-market: achieved prices where obtainable, asking prices adjusted for negotiation margin, and the absorption rate the local market can realistically take. Two Morocco-specific disciplines:

• Price the programme actually permitted, at today's prices. VPGA 10 requires clarity about whether the valuation reflects current values or explicitly modelled growth; for market value purposes we price at current levels and let the sensitivity table show the growth scenarios.
• Absorption honesty. In secondary cities and peripheral zones, the constraint on GDV is less the price per square metre than the pace of sales. A residual that assumes a large programme sells out instantly overstates land value mechanically.

Step 3 — the costs

• Construction costs — estimated per square metre built, by programme quality tier, from current contractor pricing and cost databases, including site works and utilities connection. Basement parking, difficult ground and demolition of existing structures are the classic cost escalators on Moroccan urban plots.
• Professional fees — architect (mandatory for permit drawings), engineering (structural, including seismic design under the RPS regulation), bureau de contrôle, surveys — typically estimated as a percentage of construction cost.
• Authorisation and taxes — permit fees, taxe sur les opérations de construction and related municipal charges, ANCFCC costs for the subdivision or co-ownership registration (règlement de copropriété), and the marketing/notarial costs of selling the units.
• Finance costs — interest on land and construction funding over the development period, at rates consistent with current Moroccan bank lending conditions (Bank Al-Maghrib's published reference rates frame the environment), applied to a realistic drawdown and receipts profile.
• Contingency — an explicit allowance on costs, scaled to the scheme's complexity and the reliability of the cost information.

Step 4 — developer's margin, and what remains

The developer's required profit — expressed as a percentage of GDV or of total costs — reflects the scheme's risk: pre-sales feasibility, programme complexity, market depth, planning certainty. It is a market-derived input, evidenced by what developers in that market actually require to commit, not a number chosen to make the residual land value match the asking price. After GDV has paid all costs, finance and the margin, what remains is the residual land value — including the transfer taxes and fees the land purchase itself would bear.

Sensitivity — the most important page of the report

The residual method's known weakness is input sensitivity: because land value is a residual of large opposing numbers, small changes in GDV or costs produce large swings in the result. VPGA 10 expects the valuer to confront this openly. Our reports include a two-way sensitivity table(typically GDV per square metre against construction cost, and GDV against developer's margin), showing the land value across the plausible input ranges, plus scenario lines for delayed absorption and programme downgrades. A residual presented as a single point value, without its sensitivity surface, should not pass any serious review — bank, fund or auditor.

What Moroccan residual valuations are used for

• Development finance — Moroccan banks lending on land and construction require an independent valuation; the residual demonstrates both the land value and the scheme's viability headroom.
• Joint ventures and land contributions — the standard Moroccan structure where a landowner contributes the plot to a development company against a share of units or proceeds hinges entirely on the agreed land value; an independent residual protects both sides.
• Portfolio marks and IFRS reporting — land banks held by developers and funds need periodic fair value marks; under IFRS 13 these are Level 3 measurements whose inputs must be disclosed (see our article on IFRS 13 for Moroccan portfolios).
• Acquisition underwriting — foreign investors evaluating Moroccan development plays use the residual to test whether the seller's price leaves any margin for the risk actually being taken — a core module of our investor due diligence work.

Development land valuation with ReaConsult

ReaConsult applies VPGA 10 to development land across Morocco's six major cities — urban infill plots, subdivision land, redevelopment sites and land-bank portfolios — with the residual method cross-checked against comparable plot evidence in every case. RICS-certified experts, active since 2019, more than 5,000 appraisals delivered, rated 4.9/5 on 47 Google reviews. Reports are bilingual (EN/FR), include full input disclosure and sensitivity tables, and are usable as free evidence in negotiations and adversarial proceedings; for judicial proceedings, Moroccan courts appoint their own experts. Fees start from MAD 3,500 net of tax (~£280 / ~€330) for standard assets; development appraisals are quoted within 24 hours.