Do I need an architect for a house extension in London?

While it's not a legal requirement, working with a qualified architectural designer ensures your project meets building regulations, maximises your planning approval chances, and avoids costly mistakes.

How much does it cost to hire an architect in London?

A simple rear extension design starts from £800 + VAT. Double storey extensions from £1,000 + VAT. Loft conversions from £800 + VAT. Salstan offers free consultations and fixed-fee quotes.

How long does the architectural design process take?

A typical residential project takes around 4 weeks from initial consultation to planning submission. Planning decisions usually take 8 weeks for householder applications. Technical drawings take an additional 5-7 working days after planning approval.

Do you offer a design and build service?

Yes. Salstan is a full-service, turnkey practice. We manage projects from initial concept through to completed construction, including architecture, structural engineering, and building works - all under one roof.

What areas of London do you cover?

We cover all 33 London boroughs from our offices in Park Royal and Teddington. We also work across Hertfordshire, Surrey, Essex, Kent, and other Home Counties.

Can you help if my planning application has been refused?

Yes. We regularly help clients who have received planning refusals. We review the council's reasons for refusal, redesign the scheme to address their concerns, and resubmit or lodge a formal planning appeal where appropriate.

Commercial Architecture

Commercial Projects Architecture and planning for commercial spaces

As experienced commercial architects London businesses trust, we deliver architecture, planning permission and design solutions for commercial spaces, from offices and retail to restaurants and mixed-use developments.

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500+Projects Completed

15+Years Experience

32London Boroughs

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Commercial Architecture

Design and planning for commercial spaces

As experienced commercial architects London businesses trust, we know that commercial projects involve designing and building spaces for business use, such as shops, offices, and hospitality venues. They usually require planning permission, architectural drawings, and structural input to meet building and safety regulations.We support clients through each step, making sure the space is ready to bu

50+

Commercial Projects

All

London Boroughs Covered

Change of Use

Planning applications for changing how your commercial space is classified and used under the Use Classes Order.

Fit-Out Design

Interior layouts and specifications for offices, retail, restaurants and hospitality spaces.

Planning & Licensing

Full planning submissions for new commercial developments, alterations and change of use applications.

Fixed-Fee Pricing

Clear, upfront pricing for all commercial architecture services. No surprise invoices.

Change of Use

Planning applications for changing how your commercial space is classified and used.

Fit-Out Design

Interior layouts and specifications for offices, retail, restaurants and hospitality spaces.

Planning Applications

Full planning submissions for new commercial developments and alterations.

Building Regulations

Compliance with Part B fire safety, Part M accessibility and all commercial standards.

Structural Engineering

In-house structural design for commercial alterations, mezzanines and load-bearing changes.

Project Management

End-to-end coordination from design through to construction completion.

Salstan Architecture

Commercial Projects

Understanding commercial projects in London

Most commercial projects in London will need planning permission, especially if you arechanging how a space is used, building something new, or making major alterations to the structure or layout. This includes converting a house into a shop, extending a commercial unit, or developing a mixed-use building.Getting planning permission early avoids legal issues and allows your design to meet both your needs and the council’s requirements. Local authorities assess factors like access, parking, signage, noise, and how the project fits into the surrounding area. A clear and well-prepared application makes approval much smoother.

Why Salstan

Why choose Salstan for commercial projects?

Over 1,000 projects completed across London
In-house architects, engineers and builders
Fixed-fee pricing with no hidden costs
130+ five-star Google reviews from clients

Our Approach

How we deliver commercial projects at Salstan

Natural Light Priority

Proportional Design

Material Integration

Quality Controlled

Your 3D Site Survey

An appointed surveyor visits for a full measured survey of your property. They will also note down all your desired requirements for the proposal.

Drawings Initiated

The project is allocated to one of our architectural designers who will design your project from the ground up, taking into account all your needs.

You Review It

Your first draft is typically ready in 7 working days, and within 10 unless agreed otherwise. Review the designs, send feedback, and we wrap up your drawing ready for submission.

Submission and Decision

Your plans are submitted strategically for swift approval by the council. Expect a decision in 6 to 8 weeks. We handle any required changes for free.

Technical Design

Once plans are approved, our engineers manage detailed design and regulatory compliance. Get construction quotes from us and compare with others.

Construction

If you move forward with our construction services, we arrange a detailed consultation to finalise your specific requirements, ensuring everything aligns with your vision.

Start Your Project

Do I Still Need Approval Without Planning Permission for Commercial Projects in London?

Yes—building regulations are separate from planning permission. Even if your project doesn’t require planning consent, it may still need to comply with building regulations.

Do I need building regulations approval?

Most construction projects, including extensions, conversions, and structural changes, require approval. Some minor works may be exempt.

How do I apply for building regulations approval?

You can apply through your local authority or an approved building control company. This typically involves submitting plans and undergoing site inspections.

What happens if I don't comply with building regulations in London?

Non-compliance can result in fines, legal action, or being required to redo the work to meet standards. It may also affect property sales and insurance.

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Let's Discuss Your Project

Share your project details and our team will review the scope, provide clear guidance, and come back with practical next steps — no obligation, just honest advice.

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