Make the important decisions before the expensive ones.

Before committing £100,000–£300,000+ to extending or remodelling your home, establish what is realistically possible, what the key constraints are, and what direction makes the most sense.

The Delleur Architecture Project Feasibility Review gives you experienced architectural advice at the earliest stage of the project—before you commit significant time and money to detailed design, planning and construction.

Fixed Fee: £1,250

[Start Your Project]

Clarity before commitment.

Most homeowners do not begin with a fully defined project.

You may know that your home needs more space, a better layout or a significant improvement—but still be unsure:

What should we actually build?
Should we extend or remodel?
What is likely to receive planning approval?
Is our budget realistic?
What are the risks?
Which direction offers the best overall result?

These are the decisions that shape the entire project.

The Feasibility Review helps answer them before the expensive work begins.

What you receive.

A clear architectural direction for your project.

The review brings together design thinking, planning considerations, project risk and budget awareness into one focused early-stage assessment.

It typically includes:

Project Brief

A clear understanding of what you want to achieve, your priorities, budget and intended timescale.

Property & Site Assessment

Review of the existing house, site conditions and the main physical opportunities and constraints.

Initial Planning Review

Identification of the planning considerations most likely to influence the project.

Architectural Strategy

Consideration of the strongest ways to extend, remodel or improve the property.

Budget & Risk Review

Early consideration of likely construction investment, major cost drivers and key project risks.

Architect’s Recommendation

A clear professional view on the direction we believe you should pursue.

Next-Step Strategy

A practical route into planning, Building Warrant and subsequent project stages.

This is not simply an initial drawing package.

The value of feasibility is not measured by the number of drawings produced.

It is measured by the quality of the decisions you are able to make afterwards.

The review is designed to give you:

Clarity
Understand what is realistically achievable.

Confidence
Make decisions based on professional architectural advice rather than assumptions.

Direction
Know which route is worth developing.

Risk Reduction
Identify problems before they become expensive.

A Better Investment Strategy
Direct your construction budget towards the strongest overall solution.

From uncertainty to a clear project strategy.

Before

You may be asking:

Can we extend?

How much should we build?

Will planning accept it?

Is the budget realistic?

Where should we start?

Which option is best?

After

You should understand:

What is realistically possible.

What the main constraints are.

What direction we recommend.

What further information is required.

What the project may involve financially.

What should happen next.

Who is it for?

The Project Feasibility Review is designed for homeowners considering significant residential projects, including:

Premium House Extensions

Rear, side and multi-storey extensions where design quality and investment value matter.

Whole-House Remodelling

For homes where improving the existing layout may be as important as adding floor area.

Extension + Remodelling

For projects requiring a coordinated architectural strategy rather than a simple addition.

Constrained Properties

Where boundaries, neighbours, access, levels or planning issues require careful consideration.

Significant Home Investment

Particularly where construction expenditure may exceed £100,000 and you want greater certainty before progressing.

New Homes

Strategic feasibility for new-build residential projects is available through a bespoke appointment.

Why begin with feasibility?

Because starting with drawings can be expensive.

Before developing a design in detail, it is sensible to establish:

Whether the brief is realistic.
Whether the scale of the project suits the property.
Whether planning constraints may affect the design.
Whether the intended construction budget is broadly compatible with the ambition.
Whether a different approach could deliver a better result.

A good project should begin with the right questions.

Then the drawings can follow.

A small decision before a major investment.

The process

01 — Tell us about your project

Complete a short enquiry form and provide basic information about your property, objectives, budget and timescale.

02 — Project Fit Call

Where the project appears suitable, we arrange a short conversation to understand your objectives and confirm whether the Feasibility Review is the appropriate first step.

03 — Feasibility Review

We assess the project and develop a clear architectural strategy based on the information available.

04 — Architect’s Recommendation

We present the findings and explain the direction we recommend.

05 — Decide what happens next

If you would like to progress, we can provide a clear proposal for the appropriate architectural stage.

There is no obligation to continue.

What happens next?

For projects that are ready to proceed, the Feasibility Review can lead directly into:

Planning & Developed Design

Typical fee: £4,500–£6,000

Building Warrant

Typical fee: £5,000–£7,500

Planning + Building Warrant

Typical fee: £8,500–£12,000

Full Architectural Service

Typical fee: £12,000–£25,000+

A project-specific proposal is prepared once the preferred direction and appropriate scope are understood.

Why Delleur Architecture?

Experienced judgement. Clear direction. Better projects.

A successful project requires more than a good design. It requires the right decisions to be made from the outset.

Delleur Architecture brings together over 15 years of architectural experience across design, planning, technical delivery and construction to assess your project as a whole—not simply as a set of drawings.

We combine:

Architectural design — creating thoughtful solutions that improve how your home looks, feels and works.
Planning strategy — identifying constraints early and developing proposals with a stronger route towards approval.
Technical expertise — considering how design decisions translate into practical, buildable solutions.
Construction knowledge — understanding the implications of decisions beyond the planning stage.
BIM and consultant coordination — bringing the information and specialist input required for increasingly complex projects together.
Strategic project thinking — balancing your ambitions, property, budget, risks and long-term objectives.

We do not simply ask, “How much space can we add?”

We ask:

What is the right solution for this property?

How can the existing house work harder before unnecessary floor area is added?

Where will your investment make the greatest difference?

What planning, technical or budget issues should be resolved now rather than later?

And what will create the best home and the strongest overall project?

The result is an architectural strategy shaped around your property, the way you want to live and the investment you are preparing to make.

Because the strongest projects do not begin with more drawings.

They begin with better decisions.

Ready to understand what is possible?

Make the right decisions before you commit.

Before investing in detailed design, planning and construction, establish what is achievable, what is worth pursuing and where your investment will have the greatest impact.

The Delleur Architecture Project Feasibility Review gives you experienced architectural judgement, a clear strategic direction and the confidence to move your project forward.

Project Feasibility Review

£1,250 fixed fee

Understand the opportunities.
Identify the constraints.
Test the project against your budget.
Establish the strongest architectural direction.
Leave with a clear recommendation and next step.