PlanningApp is one of the leading Planning Consultant practices in London. We are a small team of designers, builders, and structural engineers who specialise in planning applications, building regulation drawings, structural engineering calculations and full project solutions and management from start to finish. If you are looking for reliable services in and around London to take you all the way from creative direction to the ground up, PlanningApp is here to help.

Single Storey Extension

Double Storey Extension


Loft Conversion

Flat Conversion

Basement Extension

What do we offer?

We are able to deliver an extensive range of services. From a variety of house extensions, such as flat conversions and single and double storey extensions our team are able to work with any property type and help you to create your dream space. Our services include loft conversions and basement extensions, as well as outbuildings.

We are always available if you have any questions you would like answered over the phone or via email.

Why Choose PlanningApp in London?

Highly Experienced

We love our work and never fail to design and deliver. Our design methodology is rooted in our core values. We combine a wide spectrum of tools with a good portion of generosity.

Dedicated Planning

After hundreds of successful planning applications, our experience will guide you through your London council’s planning and approval processes. Our projects are examples of attitudes rather than designs. Human interaction shapes the spaces we design and how we operate.


Our team have seen it all before, having worked with projects of all shapes and sizes. We have helped hundreds of people extend their properties – all from under one roof! We expect to be held accountable for our efforts.

Questions, you may ask

Planning permission is the consent of your local authority on a proposed building project and is in place to deter inappropriate development. The building of a new dwelling, or extensive changes to existing buildings, usually requires planning permission.

By submitting a Full Application, you are seeking complete approval for the design of your proposal (including the amount, scale, layout and appearance of the development, as well as any landscaping) and the proposed access arrangements.

By law, any planning permission granted expires after a certain period. Generally, unless your permission says otherwise, you have three years from the date it’s granted to begin the development. If you haven’t started work by then, you will probably need to reapply.

The planning application process can be separated into 5 key stages:

Step 1 – Application and validation.
Step 2 – Consultation and publicity.
Step 3 – Site visit and assessment.
Step 4 – Recommendation/Modifications
Step 5 – Decision.

Building regulations set standards for the design and construction of buildings to ensure the safety and health for people in or about those buildings. … For other building work, such as internal alterations, buildings regulations approval will probably be needed, but planning permission may not be.

The Local Authority has to see that building work complies with the Regulations.

If the work does not comply, you may be asked to alter or remove it. If you fail to do this, the Local Authority may serve a notice requiring you do so within 28 days, and you will be liable for the costs.

With all building work, the owner of the property (or land) in question is ultimately responsible for complying with the relevant planning rules and building regulations (regardless of the need to apply for planning permission and/or building regulations approval or not).

Structural calculations include manual calculations and ones which are completed using specialist software.

They are worked up against specific formulas, which is why they need to be completed by a qualified Structural Engineer. The Structural Engineer must sign the report to make it valid.

If you are planning to renovate or build an extension, you might need a structural engineer to assess the structural condition of your home and calculate the types, weights and dimensions of the materials you need or want to use.

Likewise, if you are self-building, a structural engineer will be vital.

Many practices have an in-house structural engineer or have a structural engineer that they work with and instruct to carry out the drawings and calculations on your behalf.

All you need to do is fill out our online form which provides us with more information about your project, this way we can get back to you with a more accurate quote. If you would prefer to speak to one of our planning consultants directly, you can call us on: 020 3984 8456 / mobile: 07737 347968


Marius came around and looked at our house and was very professional, he dealt with all the drawings and helped us

with dealing with the online application to the council, leaving us stress free.

Full permission granted and all ready to build, great job will 100% recommend to others.

Jarni, Singapore

A smooth transaction with Marius from receiving a quote and get the final work.

He redid the work for me when there was a miscommunication with myself and my builder.

No hassle involved at all. Recommended.

Richard, Harlow

I have found the online trade portal sites a bit hit and miss but Marius is definitely a hit.

Provided a quote and stuck to it. Was quick to come round and do a site visit and drawings followed promptly afterwards.

A few amends required as is normally the case following the architectural drawings and builders had started work.

Would definitely use again and happily recommend.

luke, Chigwell

Highly recommended. Marius is very helpful, organised and flexible, easy in communications and was ready to fit

in our very tight timeline of the project. Thanks!

Alex, London

Marius was on it. Quick responses on email. Fast to site and quick to provide structural calculations and drawings.

Mehmet, Enfield

Great Quote, Great Guy! Thank you for an awesome quoting experience. Most Definitely would be using them in the future.


PlanningApp provided a professional service at very short notice, he took all measures and responsibility

to handle my planning permission and deliver all documentation and drawings to the appropriate Royal

Greenwich Borough Of London departments. Outstanding services / Highly Recommended.

Ward Family

Marius was very clear and patient throughout the process of developing my side extension plans.

Communication was great and associated work with the structural engineer all went smoothly.

I’d highly recommend.

Phil, Enfield

The team has been exceptionally helpful, revising drawings as necessary and has provided all the support

with planning and building control I could have hoped for.

I couldn’t recommend them highly enough.

Grace, Gravesend

Very impressed with the work. Quick to understand my requirements, and responds promptly.

Will continue using him and already recommended him to a friend.

Andreea, Borehamwood

I had a complicated project to relocate some stairs in a period property where no wall was straight and I had

the task of trying not to lose space in the bathroom upstairs as well as making my hallway bigger.

The 3DS provided where great and I got to keep the original file which allowed me to play with it and share it with my family.

Definitely recommend

Jason, Lewisham

Marius was really helpful and professional as well as friendly and approachable.

He helped us through the whole process with care and attention , he was informative and helped us overcome some hiccups with the council. We now have our planning application all in place thanks to him !

Govinda, Merton

Marco did an excellent job at providing the drawings I needed for my roof terrace planning permission.

He did the work promptly, at a reasonable price and was an absolute pleasure. I would definitely recommend

Keira, Bromley

I was very happy with the drawings done by PlanningApp, I would recommend this company to friends and family,

I was so happy with their work, I have given them another job to do.

Felicia, Chelmsford

Jorge has been great. He’s extremely capable and well organised.

He communicates really well and kept us updated at every stage.

He drew very good plans and organised planning permission with no fuss or stress for us.

I would highly recommend Marius as a project manager.

Alice, Southend-on-Sea

Very pleased with the service. Smooth and quick process, professional, clear with on going support. Thanks!

Joanna, Stratford

Overall a brilliant experience and very thankful to PlanningApp team for a prompt and

excellent service tailored to our requirements. We needed structural calculations for a side extension and

they managed to come up with an even better plan than previously envisaged. Above all, at a very reasonable price!

Afzal, Romford

Planning Application Services

Building Regulations Drawings

Structural Engineering Calculations