Before starting a construction project — whether it’s a home extension, a loft conversion, a new build or a complex renovation — one of the most valuable steps you can take is commissioning a feasibility study. It’s an essential tool used by homeowners, architects, developers and structural engineers to assess whether a project is practical, safe, cost-effective and compliant with planning and Building Regulations.
A feasibility study prevents costly mistakes by identifying risks early and providing the clarity needed to move forward with confidence.
In this guide, we explain what a feasibility study is, why it matters, what it includes and how it supports a successful project.
What Is a Feasibility Study?
A feasibility study is an engineering and design appraisal that assesses whether a proposed construction project is viable in terms of:
- structural integrity
- planning and regulatory constraints
- buildability
- cost implications
- site conditions
- architectural goals
It answers key questions such as:
- Can this project be safely built on this site?
- What structural alterations are needed?
- Is the proposal likely to meet Building Regulations?
- What risks or constraints must be addressed?
- Is the project financially realistic?
Feasibility studies are undertaken before detailed design work begins, ensuring time and money are not wasted pursuing a plan that later proves unworkable.
Why Feasibility Studies Matter
Construction projects can quickly become expensive or problematic if foundational issues are not addressed early. A feasibility study helps avoid:
- unexpected structural challenges
- failed planning applications
- unsuitable design choices
- costly redesign work
- delays during construction
- budget overruns
It offers clear guidance, realistic expectations and actionable insight that sets the project up for success.
What a Feasibility Study Typically Includes
While the scope can vary depending on the project, a thorough feasibility study generally includes the following components:
1. Assessment of Existing Structure and Site Conditions
Understanding what currently exists is the foundation of any project.
A structural engineer examines:
- load-bearing walls
- roof configuration
- foundation type and condition
- floor structure
- previous alterations
- any visible structural issues (cracks, deflection, subsidence)
- roof capacity for loft conversions
- ability to support new loads
If the existing structure cannot support the proposed works, the design must be rethought before moving forward.
2. Engineering Review of the Proposed Design
The engineer evaluates the early-stage architectural concept to determine:
- which structural elements must be removed, altered or reinforced
- whether new supports or steel beams are required
- the feasibility of achieving large openings (e.g., bi-fold doors)
- the impact on roof stability
- load redistribution pathways
- limitations caused by site constraints
This ensures the design is buildable, not just aesthetically appealing.
3. Planning & Building Regulations Considerations
The study highlights whether the proposal is likely to comply with:
- Planning permission requirements
- Permitted development rights
- Building Regulations (especially Part A – Structural Safety)
- Party Wall matters (if applicable)
- Overlooking, height or extension limits
This early insight helps avoid failed applications and redesigns.
4. Structural Options and Recommendations
The engineer may outline different structural approaches such as:
- steel vs timber beams
- retaining wall solutions
- alternative load paths
- options to reduce construction cost
- recommended reinforcement
- roof redesign options
These options help clients and architects make informed decisions before detailed design work begins.
5. Cost Implications
Feasibility studies often highlight approximate cost impacts, including:
- steelwork requirements
- foundation adjustments
- demolition and temporary supports
- structural strengthening
- specialist elements (retaining walls, roof trusses, etc.)
Understanding cost impacts early helps avoid budget shock later.
6. Risks, Constraints & Potential Challenges
Identifying risks in advance is one of the most valuable outcomes of a feasibility study.
Common issues include:
- insufficient headroom for loft conversions
- restrictive existing foundations
- drainage conflicts
- poor soil conditions
- oversized proposed openings
- inadequate access for steel installation
- neighbouring structures posing stability concerns
These risks must be addressed in the design phase, not during construction.
7. Provisional Structural Strategy
The engineer summarises an initial structural approach, which may include:
- indicative beam positions
- preliminary beam sizes (non-final)
- load-bearing requirements
- areas requiring additional investigation
- proposed support strategy (walls, columns, padstones)
This gives the design team a clear direction for the next stage.
When Should You Get a Feasibility Study?
A feasibility study is helpful when:
- exploring an extension or conversion for the first time
- unsure if the existing structure can support the proposed idea
- planning major structural alterations
- preparing for a new build
- needing clarity before committing to architectural fees
- buying a property with renovation potential
It is particularly valuable in complex or older properties where unknowns are common.
How a Feasibility Study Supports a Successful Project
A well-prepared feasibility study ensures:
- safer structural design
- fewer changes later
- smoother planning approval
- better cost control
- increased confidence in feasibility
- clear communication between stakeholders
It acts as a roadmap guiding the project from concept to completion.
How Nicholson Associates UK Can Help
We provide professional feasibility studies for:
- home extensions
- loft conversions
- structural alterations
- new builds
- commercial projects
- multi-property development sites
Our feasibility reports give clients:
- a clear understanding of structural requirements
- early identification of risks
- realistic cost expectations
- confidence in moving forward
- robust engineering guidance from day one
With 30+ years of engineering experience, our goal is to ensure your project begins on the right foundation.
Considering a construction project? Contact Nicholson Associates UK today for a comprehensive feasibility study to guide your planning and design process.