RICS Cost Analysis and Benchmarking: UK Practice Information Guide

In August 2024, the Royal Institution of Chartered Surveyors released the second edition of the UK Practice Information on Cost Analysis and Benchmarking. If you are preparing for your RICS APC assessment, this document isn't just a set of guidelines—it is the very language you are expected to speak. It represents a shift toward capital cost clarity in a landscape where every pound spent on a building is scrutinized for its value and its impact. You might think of cost analysis as a post-mortem of a project—a way to look back at what happened—but in the hands of a skilled surveyor, it is actually a predictive tool. It is about taking the messy, complex reality of a finished building and distilling it into a product-based cost model that can light the way for future projects. When you perform a cost analysis, you aren't just recording numbers—you are conducting a full appraisal of the distribution of cost across construction elements to ensure that the next time someone asks for an estimate, you aren't guessing—you are modeling. This practice information is designed to take you through the three levels of competence required for your assessment: the "knowing" of Level 1, the "doing" of Level 2, and the "advising" of Level 3. By the end of this session, you will have a technical grasp of how to move from a raw contract sum to a sophisticated benchmark that accounts for everything from the price of steel to the carbon footprint of a facade. We are going to look at why benchmarking isn't just about finding the average, but about identifying the "best in class" and understanding the risks that live in the gaps between projects. So let's dive into the foundational principles that define the profession's approach to these critical operations.

A building is rarely just a single entity when viewed through the lens of a surveyor—it is a collection of systems, or elements, each with its own cost trajectory. To reach Level 1 competence, you must understand that cost analysis is an examination of how money is distributed across these elements. It provides a bridge between the past and the future, helping you estimate the costs of similar buildings or even specific components like a foundation or a frame. But why do we do this? It is often about "design to cost"—a management strategy where cost is treated as an independent design parameter rather than a byproduct of the architect's pen. You are essentially creating a feedback loop where the employer's budget and the design team's vision are constantly reconciled to ensure value for money. This process relies on a consistent structure, which is where the Building Cost Information Service—or BCIS—and the New Rules of Measurement—NRM—come in. By using a standardized format, you can collect data across a huge volume of projects and see trends that would be invisible if every firm used their own system. This structural consistency allows you to model projects conceptually in terms of floor area, functional units like hospital beds or hotel rooms, and even the carbon footprint of the build. The goal is to move away from physical modeling, which is slow and rigid, and toward virtual modeling—sometimes using BIM tools—to create a database that can be manipulated to reflect changing costs and quantities in real time. You are building a record of the project as constructed, capturing floor areas like Gross Internal Area—GIA—and Net Internal Area—NIA—alongside the contract sum and the base date. This is the bedrock of professional practice: ensuring that the data you record today becomes the reliable intelligence someone else will use three years from now.

If you were to build two identical office blocks—one in the heart of London and one in the suburbs of Sheffield—the costs would never match. This reality is at the core of project indexation, a technical requirement for any surveyor who wants to use historical data for future planning. There are two primary forces you have to account for: geography and the state of the economy. Location influences everything from the availability of specialized labor to the transportation routes for materials and even the existing land conditions. Meanwhile, the construction activity, although influenced by the economic activity of the UK, does not necessarily reflect the pattern or profile of UK economic activity; while we often talk about inflation through the Consumer Prices Index or the Retail Prices Index, these are not construction-specific and must be used with extreme care. Instead, you likely turn to BCIS Tender Price Indices or location factors to "base" your data, allowing for a straightforward adjustment. For example, a project with a base date in 2011 would need to be updated to reflect the market conditions of 2026. In some sectors, like healthcare, you might use specialized indices like MIPS—the Median Index of Public Sector Building Tender Prices. It is important to remember that a specific project's tender price index reflects its unique scale and ease of construction, so when you are adjusting for a new project, it is usually better to use average location and time indices rather than the specific index from the old job. You also have to consider the procurement method—a negotiated contract might offer a client value, but the price might be higher than if it had been won through open competition. This nuance is why the RICS guidance emphasizes that poor quality or inaccurate information in your analysis will negatively impact every piece of advice you give afterward.

What exactly should you be recording when you sit down to analyze a project? It goes far beyond the final check written to the contractor. You are looking for indicators of design efficiency, such as the wall to floor ratio and the NIA to GIA ratio. If you base your future advice on an old project that was inherently inefficient in its layout, your forecast for a new project will carry that inefficiency forward, preventing continuous improvement in the industry. You need to capture the number of storeys, the presence of a basement, and the functional units involved. The procurement route is another critical data point—was it a lump sum, a guaranteed maximum price, or a cost-reimbursement contract? A "design and build" project might have a completely different cost profile than a traditional one because the contractor is taking on risks that the employer would otherwise retain. You are also looking for the "tender spread"—how much did the bids vary?—and the sustainability rating, which might include an assessment fee or specialized low-carbon technology that pushes the price up. One of the trickiest parts of this work is handling mixed-use developments. If a single contract covers an apartment block and an office space, do you split the analysis? If you do, you have to decide how to allocate shared costs like access roads, demolition, and preliminaries—perhaps pro-rata based on floor area or value. If you don't clearly note your methodology here, future users might discount your data because they can't trust the underlying logic. This level of detail ensures that when you finally move to benchmarking, you are comparing like with like.

Benchmarking is a term that often gets misused in casual conversation, but for the RICS professional, it has a very specific meaning. It is not about finding the average or the minimum acceptable standard—it is about identifying the "best in class" performance. It is a systematic method of comparing an organization or a project against others to find lessons that drive targeted improvements. In construction, this helps us manage "optimism bias"—that natural human tendency to assume a project will be finished faster and cheaper than it actually will be. By looking at factual outcomes from executed projects, you can set realistic targets that represent an improvement on what has gone before. You might benchmark the cost per square meter of GIA, the carbon footprint using the RICS Whole Life Carbon Assessment tool, or the construction duration in weeks. This process is most powerful during the early RIBA stages, before the design is locked in and significant money has been spent. But a benchmark is only as good as the analysis that supports it. If you establish that the benchmark cost for an office is £1,600 per square meter, but your data is based on buildings with no air conditioning and strip foundations, while your current project requires piling and full climate control, that benchmark is useless until it is put into context. You have to interrogate the results, remove outliers that skew the range, and ensure that the employer's approval was obtained before using their data. Ultimately, the relationship between cost analysis and benchmarking is symbiotic: you use the analysis to feed the benchmark, and the benchmark to inform the next cost plan.

When you move into Level 2 competence—the "doing"—the first question you ask isn't "what are the numbers?" but "what is this information going to be used for?". You are looking at the source of your data—is it a bill of quantities, which makes it easy to see unit rates, or a contract sum analysis, where the detail might be buried?. You want to represent the cost in a way that someone with no knowledge of the project can understand. For example, a substructure description that just says "foundations and ground floor" tells an observer nothing. A professional description specifies that the unit rate relates to ground beams with pad foundations 1,000mm deep and a 175mm thick concrete slab. This detail allows the rate to be used as a legitimate reference. You also have to identify "abnormals"—those project-specific costs that aren't typical, like piling necessitated by poor ground. You must allocate these to the correct element, like foundations, but you must also draw attention to them so they don't skew your benchmarking of "typical" buildings. If you are working with multiple buildings under one contract, you might even create two analyses: one analysis with the abnormals clearly identified and allocated to the correct element, which facilitates better benchmarking later. When it comes to indexing, remember that the "base date" for a lump sum project is usually ten days before the tender return, while for a project where the price isn't fixed, it is generally the midpoint of construction. These technical nuances are what separate a high-quality analysis from a simple list of expenses.

Level 3 competence is about "advising"—taking all that data and turning it into a strategy for the client. One of the most effective ways to do this is by setting a "target model" for a planned project. This model isn't just a budget; it is a practical, realistic vision of what can be achieved, informed by the factual outcomes of past projects. You use your benchmarking to set targets for each construction element, but you also look at the percentage distribution of cost. If your data shows that services typically make up 33% of a school's cost, but your current design has them at 45%, you have a starting point for value engineering. You must also advise on the risk profile. In the early stages, you might use a percentage allowance for risk, but as the design develops, you should replace this with a formal risk analysis that categorizes threats into design development risks, construction risks, and employer change risks. Your advice might be to avoid a risk by changing the design, reducing it through site investigation, or transferring it through the contract strategy. You also have to be the voice of reality regarding changing regulations. Building codes change over time, making construction more expensive in ways that standard indices don't always capture. When you report your findings to an employer, you should clarify your methodology, explain how you dealt with abnormals, and show them not just the "benchmark" project, but what the range of data tells them about their own project's risk.

As we wrap up this technical deep dive, it is worth looking back at the RICS framework that governs all of this work. The Standards and Regulation Board oversees the profession to ensure that chartered surveyors operate in the public interest, following high technical and ethical standards. While the practice information we've discussed is not mandatory in the sense that it doesn't use the "must" requirements of a professional standard, it is not mandatory and does not set requirements or explicit recommendations. You've seen how a project starts as a raw set of costs and, through the discipline of analysis and indexation, becomes part of a broader intelligence network. You've learned to distinguish between GIA and NIA, to account for the price of steel and the impact of a basement, and to identify the "best in class" without being blinded by averages. As you prepare for your APC, consider how you might apply these principles to your own case studies. Think about the last project you worked on—how would you structure its cost analysis? What were the abnormals that skewed its profile? By turning these technical details into a habit of mind, you aren't just memorizing a document; you are building the foundation of a career dedicated to creating certainty in an inherently uncertain industry. Thank you for your focus today. Take a moment to reflect on which of these concepts—perhaps the indexation of location or the nuances of the target model—challenges your current understanding the most, and use that as the starting point for your next study session.