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.

Compliance & Approvals

Building Regulations Navigating compliance with architectural precision

Building regulations in London are legal standards ensuring all construction meets safety, structural and energy requirements. Our team manages the entire compliance process for you.

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500+Projects Completed

15+Years Experience

32London Boroughs

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Understanding Compliance

Building regulations made simple

Building regulations in London are legal standards set by the government to ensure that all construction and renovation work meets key requirements for safety, health, energy efficiency, and accessibility.Whether you're extending your home, converting a loft, or installing new systems, building regulations ensure the finished result is safe and fit for use.

Our team handles everything from initial design through to completion, all managed in-house.

100%

Compliance Rate

2-4 wks

Typical Approval Timeline

Full Plans Applications

We prepare and submit detailed plans for Building Control approval before your construction begins.

Structural Compliance

In-house structural calculations and drawings meeting Approved Document A requirements for every project.

Completion Certificates

We manage the entire process through to sign-off, ensuring you receive your completion certificate.

Transparent Pricing

Clear, fixed-fee quotes for all building regulations work. No hidden charges at any stage.

Full Plans Application

We prepare and submit detailed plans for Building Control approval before construction begins.

Building Notice

For simpler projects, we handle the Building Notice route to get work started quickly.

Structural Engineering

In-house structural calculations and drawings meeting Approved Document A requirements.

Fire Safety

Designs meeting Approved Document B for fire detection, means of escape and structural fire resistance.

Energy Efficiency

SAP calculations and U-value compliance under Part L for extensions and new builds.

Completion Certificates

We ensure Building Control sign-off and help obtain your completion certificate.

Salstan Architecture

Building Regulations

Understanding building regulations in London

Why Salstan

Why choose Salstan for building regulations?

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 building regulations at Salstan

You’ll likely need to follow building regulations in London if your project involves:Building a new structure or extending an existing oneChange of use from a non-living to a living spaceMaking structural changes to your property

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?

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?

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.

TRANSPARENT PRICING

Building Regulations Pricing

Detailed technical drawings that both your builder and building control can follow.

Single Storey Extension

From £500 + VAT

Starting price, confirmed on review

Full building regulation drawings
Technical specifications
Expert building control advice
Combined with structural package

Get a Quote

Double Storey Extension

From £500 + VAT

Starting price, confirmed on review

Full building regulation drawings
Technical specifications
Expert building control advice
Combined with structural package

Get a Quote

Flat Conversion

From £1,000 + VAT

Starting price, confirmed on review

Full building regulation drawings
Technical specs and fire strategy
Expert building control advice
Combined with structural package

Get a Quote

Building regulation drawings are available when combined with a structural design package. View full pricing details

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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.

How It Works