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House Extension Design Services

At Detailed Planning, we pride ourselves on providing you with an expert, reliable and professional service. Every client and every project are treated with excellent care to ensure the success of your project.

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Or call us now on 020 8150 0494

House Extensions

House extensions are an excellent way to make the most of your property and to create a space that truly reflects your home. Whether you need additional rooms or simply want to open up the space you already have, we can help maximise your vision.

Extending your home not only allows you to expand your living space but it can also increase the value of your property. More and more people are recognising the benefits of house extensions, but many are discouraged by the fear of failure or expense. Therefore, our practice combines experienced designers with an expert service to deliver high quality house extension plans for our clients.

Here at Detailed Planning, we work closely with our clients to explain the process from start to finish whilst creating a design that will ensure a successful house extension that can be enjoyed for years to come. We will combine your brief with our expertise to design an extension that is individual to you.

House Extension Design Process

1. Design

Whether your family is growing, and you need an extra bedroom, or you want a new bright modern open plan living; we can help find a solution to maximise your space. Here at Detailed Planning, we have a team of trained designers that are specialised in creating amazing spaces for all types of briefs. We understand the cost of developing a property, so we’re sensitive to our costs and guidance. We aim to help you stretch your money enough to get the best results!

2. Get Approved

We are experts at obtaining planning consent for house extensions. If your house benefits from permitted development rights, we’ll complete the necessary drawing and documents to demonstrate your proposal falls within permitted development guidance. Should your house extension require planning consent, we can give you the best chance of planning consent by acting as your agent throughout the process.

3. Technical

This is the stage where the detailed technical drawings are carried out by our design team. We believe in providing extra detail so your builder construction your project with the quality it deserves. Remember, in order for a project to go accordingly, having a good, detailed set of drawings is crucial.

4. Ready. Set. Go

At last! Your dream home is now ready to go under construction! This is all very exciting and you now have all the relevant drawings to hand. At this point of the project, we provide a continued support service, so feel free to call us whenever you like. All that’s left to do now is grab a cup of tea and relax!

House Extension Case Study

This house extension project exceeded our client’s expectations and created a space for their family to enjoy for years to come.

Read their story

Excellent service. Paul is very thorough and took his time to make his decisions and explain them to me. He is friendly and helpful and has a 'can do' attitude.

Would definitely recommend for any detailed drawings required, we got them in late in the day to provide building regs drawings, were really efficient in completing within the required timescales and went into a lot of detail to make sure everything was right.

I felt in very capable hands and expertly advised. I'd highly recommend Detailed Planning. Our new loft conversion has maximised the space available to us. 

Why Choose Us For Your House Extension Project?

Understanding Your Project Goals

When we begin, we'll take time to understand your brief, you may also have ideas of how the your house extension will look. We'll take this into consideration but also consider costs, planning constraints and build ability. There's no point designing something that can't be built!

Striving to Create Quality Spaces

Our number one goal is to create spaces that meet requirements and go beyond the expectations of our clients. We love to hear that our clients are enjoying their new extension and this gives us the energy to go on.

Believe In Quality Design for Everyone

Good design should not be limited to some Architects only. We are here to provide excellent architectural environments to all, at a more realistic cost compared with some architect fees.

Pushing Technical Detail

Every house extension project is unique and ensuring it is buildable should be considered from the outset. Should we provide technical drawings, we’ll make sure risks on site are reduced by considering all parts of your project. This should lead to overall cost savings and minimised delays.

High Planning Success Rate

We never take on a project where the principle of the development seems unlikely to be approved. During the design, we’ll use our knowledge and check planning policies to give your application the best chance of success. We have worked with many authorities and understand how planning applications are decided.

Flexible Design Approach

We are not fixed to one design style; therefore we can be used for realist house extension design to ultra contemporary. We will listen to your brief and design a bespoke extension meeting your needs.

Free Quote

Want to talk about your project? We carry out a free review of each enquiry to ensure there is a reasonable chance of success.

Our quotes are free and we can provide free office consultations should your project be viable.

Single Storey House Extension Plan Fees

Whilst every project is entirely unique; presenting its own challenges, demands, and goals, we can give an idea for ball-park fees for various levels of service.

Site Visit/Measure

  • Consultation to Review Brief
  • Laser Measure of Your Property
  • Floor Plans and Elevation Measure
  • Existing Drainage and Property Investigation
  • Photographic Schedule
£250 +vat

*this price is an estimate based on previous project, not an actual quote

Drafting/Design

  • Existing Drawings
  • Proposed Drawings
  • Up to 3 free revised drawing sets
  • Planning applcation preparation (exc. council fee)
  • Act as your planning application
  • Negotiations and revisions with your case officer to achieve a succesful application
£650 +vat

*this price is an estimate based on previous project, not an actual quote

Technical

  • Building regulation specification
  • 1:50 detailed plans
  • 1:50 section drawing
  • 1:10 detailed sections
  • Submission and liasing with Building Control (excl. fee)
  • Liasing with other consultations, i.e. engineer and party wall surveyor
£700 +vat

*this price is an estimate based on previous project, not an actual quote

£250 +vat

*this price is an estimate based on previous project, not an actual quote

£650 +vat

*this price is an estimate based on previous project, not an actual quote

£700 +vat

*this price is an estimate based on previous project, not an actual quote

Questions to Ask Your House Extension Designer

1. How much experience do you have?
Detailed Planning have completed hundreds of successful projects, from small extensions to large glazed modern extensions. We are up to date with planning and regulation policies to help avoid bumps in the process.
2. Have you worked within my local borough?
We’ve worked within every London Borough as well as the surrounding counties; this means we have excellent knowledge of what’s likely to be approved. Should we work further afield, we’ll make sure we’ll study the policies to determine if the development is feasibly, before proceeding.
3. Do you have liability insurance and a quality control process?
Our company has liability insurance of up to £1,000,000. To reduce risk, as well as using our depth of knowledge, we have a team to check others work prior to issue of any documents.
4. Will you manage all the pre-construction approvals?
The project will usually involve multiple approvals, not just planning consent. This will likely include, building control plan check approval, party wall agreements as well as structural calculations.
5. Will you assist with liasing with other consultants?
Yes, we will ensure that all the necessary consultants are instructed and are carrying out their duties. We discuss the project with them directly and make sure they have everything they need.

Did You Know?

We have completed over 1000 projects
We have 97.5% success rate on planning application
100% building regulations approval!

About

  • Company Number
    07820362
  • Registered Address
    Unit 6 St. Albans House
    St. Albans Lane
    London
    England
    NW11 7QE
Contact Us

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