Viability software for faster, clearer development decisions.
Domus helps teams test viability, compare scenarios, and hold onto a clean scheme baseline once the first appraisal is done.
Book a demo to see the full platform
Structured modelling
Build viability cases with GDV, costs, finance, contingencies, and returns in a repeatable structure.
Scenario testing
Test pricing, cost, phasing, and finance changes quickly so teams can see what actually moves the scheme.
Decision-ready outputs
Take viability work into reviews, approvals, and live scheme decisions without switching back to disconnected spreadsheets.
What teams need from viability software
Better visibility before the scheme becomes expensive to change.
Site screening and early-stage land decisions
Residual land value and profit testing
Sensitivity analysis across build cost, GDV, and finance terms
Funding conversations that need a clearer viability baseline
What viability software needs to do
Viability software that connects the model to what happens next.
Viability software is only useful if teams can act on it. That means the model needs to stay live, connect to the scheme assumptions everyone is working from, and produce outputs that hold up when challenged.
Residual land value modelling
Build the viability case across GDV, costs, finance, contingencies, and developer return. The residual position needs to be traceable back to every assumption, not just a number at the bottom of a page.
Section 106 and planning obligation testing
Model affordable housing percentage, section 106 cash contributions, CIL liability, and BNG costs against the residual. Test what level of obligations the scheme can viably support before entering planning negotiations.
Benchmark land value comparison
Compare the residual land value against benchmark land value (existing use value plus premium) to determine the viability position under NPPF guidance. The gap between RLV and BLV is what drives planning negotiations.
Scenario and sensitivity testing
Test how changes to GDV assumptions, build cost inflation, finance rates, and programme affect the viability position. Sensitivity analysis turns a single appraisal into a range of defensible positions.
CIL viability
Community Infrastructure Levy charges apply across most of England and Wales. Model CIL liability as part of the overall viability position and test whether exceptional circumstances relief applies if the levy makes the scheme unviable.
Submission-ready outputs
A viability assessment submitted to a local planning authority needs to be clear, consistent, and traceable. Domus connects the viability model to the formal evidence trail so teams aren't rebuilding outputs from notes and screenshots.
Common questions
Viability software: frequently asked questions.
What is viability assessment software?+
Viability assessment software helps developers and planning consultants model whether a scheme can viably deliver planning obligations including affordable housing, section 106 and CIL, and still return a competitive profit. It uses the residual land value method and produces outputs suitable for planning submissions.
What is the difference between viability software and a development appraisal?+
A development appraisal tests overall financial viability (GDV, costs, profit, RLV). A viability assessment specifically tests whether the scheme can viably support planning obligations by comparing the RLV against a benchmark land value set by policy.
How does viability software handle section 106?+
Section 106 obligations are modelled as cost items in the residual land value calculation. The software tests different levels of s106 obligations and shows how each moves the residual position relative to the benchmark land value.
Who uses viability assessment software?+
Property developers, housebuilders, planning consultants, and LPA officers. Developers build the viability case for planning negotiations. Planning consultants produce formal viability assessments. LPA officers review submissions as part of the planning decision process.