Due Diligence & Abnormal Cost Assessments

Early-stage engineering due diligence to identify abnormal risk, protect budgets and support confident site acquisition.

Supporting 250+ projects, clients and councils across the UK

01. Our Difference

Due diligence built around abnormal cost drivers.

Many due diligence exercises focus on planning policy or high-level constraints. Our due diligence packages focus specifically on abnormal engineering and environmental risks. These are the issues that most often derail budgets once a site moves into design and construction.

Our structured, multi-disciplinary risk reviews focus on the issues that most commonly drive unplanned spend, redesign and stalled projects:

Our role is to identify where credible risk exists, how it could affect development, and what technical actions may be required to manage it.

This provides clients with early visibility of abnormal exposure, allowing informed acquisition decisions, realistic cost planning and targeted follow-on investigations.

For project specific advice

02. Why Clients Rely On Us

A structured framework for early-stage development risk.

Development-Led

Reviews are aligned with development objectives, proposed use and likely construction approach.

Risk-Focused

Effort is concentrated on issues with the greatest potential to impact cost, feasibility and programme.

Evidence-Led

Findings are supported by available records, site reconnaissance and technical appraisal.

Action-Oriented

Outputs are framed around decisions: what matters, why it matters, and what next.

03. Highlights

Certainty and speed in every phase of planning.

Planning Conditions Supported
0 +
First-Time Approval Rate
0 %
Until Your First Draft Lands
0 Days
Years Of Experience
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04. The Detail

What is a Due Diligence & Abnormal Cost Assessment?

A Due Diligence & Abnormal Cost Assessment is an early-stage technical review designed to identify engineering and environmental risks before they impact development viability.

Unlike standard compliance reporting, this is a commercially framed assessment that allows development teams to move forward with clarity.

We focus on understanding site constraints and identifying abnormal construction drivers to highlight critical design needs and quantify potential cost and programme exposure.

What our due diligence reporting typically covers

Our output is designed for rapid decision-making, providing a structured summary of site viability. Every assessment reviews the following constraints that shape developable area and abnormal costs.

05. Our Support

Where due diligence fits within your project.

Due diligence provides the greatest value when technical red flags are identified before capital is committed.

Pre-Acquisition & Land Bidding

Rapid risk screening to support early stage decisions. We provide the technical evidence needed to justify land bids or renegotiate purchase terms based on abnormal findings.

Option Appraisal

Comparative analysis of different development scenarios. We evaluate how various site layouts or uses interact with technical constraints to identify the most viable and cost-effective path.

Pre-Planning Strategy

We provide early visibility on investigation requirements, allowing you to set realistic budgets and design directions from day one.

Funding & Internal Approvals

Our commercially framed reporting translates complex engineering risks into clear language for funders, stakeholders, and investment committees

06. Our Process

From site appraisal to planning submission

1

Brief & Data Collation

Aligning with your risk priorities and aggregating planning, environmental, and historical datasets to identify known constraints.

2

Site Appraisal & Screening

A high-level technical walkover to verify desk-study findings and identify physical on-the-ground engineering risks.

3

Risk & Abnormal Appraisal

Evaluation of technical red flags with specific commentary on potential construction cost and programme exposure.

4

Reporting & Decision Support

Delivery of a commercially framed report and actionable roadmap, providing the clarity needed for investment or acquisition.

Contact Us

We provide the expertise to simplify complex challenges for faster approvals of tough planning requirements.

07. Testimonials

Don't just take our word for it.

08. Frequently Asked Questions

Your questions answered.

Still have any questions about due dilligence assessments or planning?

Ideally during the pre-acquisition or option appraisal stage. Identifying red flags early ensures you have the flexibility to adjust site layouts, renegotiate purchase terms, or walk away before capital is committed.

No. Due diligence is a high-level commercial screening tool used to identify red flags before acquisition. It defines the scope for formal Phase 1 and Phase 2 assessments, ensuring that future investigations are targeted and that budgets for planning-grade reporting are accurate.

Yes. Our reports provide a commercially framed breakdown of abnormal engineering risks. This evidence is frequently used by developers to justify price reductions, set conditions precedent, or secure abnormal cost allowances.

Yes. We provide continuity throughout the project lifecycle, from detailed ground investigations to remediation management and planning condition discharge.

No. Each due diligence package is tailored to the site, proposal and commercial objectives.