Architectural Design Services in Essex
We provide architectural design services in Essex, helping homeowners plan and deliver house extensions with clear advice on design, planning permission, structural requirements and build costs.
Essex's #1 architectural design firm
With the most 5-star
Google reviews
What is architectural design and why do you need it?
No matter the size or scope of a house extension project, architectural design is always the starting point. Every project requires some form of application, including permitted development, so an architect will help you decide on the best route to take and produce a set of planning drawings that clearly show what the finished project will look like.
Approved building contractors
Once the architectural design stage is complete and we have a design you love, we can introduce our approved building contractors. The architectural drawings form the foundation for the building regulations drawings and structural engineering designs.
Avoid costly mistakes
It is important to get the architectural design stage right because it influences every other stage that follows, including the build. Fail to plan and you plan to fail.Let us help you avoid any problems down the line.
With 5,000+ projects to our name
We provide all the services you'll need
How good design impacts home extensions
A good architectural design service goes beyond aesthetics, it’s about functionality and compliance. With a well-designed plan, you’ll be able to get a vision of what the property will look like and how much of an improvement it will make. On top of this, your home extension will not only look stunning but also meet local planning regulations and building standards in Essex or London. This reduces the risk of issues during construction, ensuring a smoother, stress-free build.
Avoid the hassle of using multiple companies
More Google Reviews Here
Based in Brentwood, Essex, we were also introduced to builders and tradespeople through Kirkwood, and they were excellent—professional, respectful, and a pleasure to work with. If we ever take on another project, we wouldn’t hesitate to use them again.
We now have an amazing extension, and would be happy to use the team again.







Very knowledgeable and contactable throughout the process.
Couldn't ask for a better outcome and value for money.
Will definitely be recommending and 100% will use again!
5 star!!!

- Avoid costly build errors
- Prevent council disputes
Kirkwood Services
We can also provide
Additional services if required
3D Kitchen Designs
See your kitchen in 3D with Howdens—we handle everything for you.
Build Costs
Don't design over budget, our team offer build cost advice.
Build Inspections
Experts inspect your builder's work confidentially.
Approved Builders
Kirkwood’s network of trusted trades delivers competitive quotes.
Kitchen Discounts
Kirkwood trade discounts deliver premium Howdens kitchens affordably.
Price Checks
We manage quotes and contracts with Kirkwood Build Contracts, saving you time and money.
Comprehensive Service
We manage every detail of your extension, from quotes to contracts.
Piled Foundations
As extensions increasingly require piling, Kirkwood specializes in this area.
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Straight-talking architecture
Essex | London Architectural Design & Planning
Serving Essex & surrounding areas
Architectural Design Services in Essex
No1 in Essex for designing home extensions and loft conversions
Get an instant design quote
Where would you like to extend?
Detached
Semi Detached
Terrace
Bungalow
Benefits of a professional architectural design service
A professional architectural design service ensures your home extension is tailored to your requirements. We ask lots of question to try and get a firm understanding of your needs. By working with us, you’ll benefit from a design that optimises space, enhances natural light and integrates perfectly with your existing home. In areas like Essex and London, where planning permission can be complex, professional guidance can save you time and prevent expensive delays.
Don't take our word for it
See what our customers are saying on Google Reviews
Based in Brentwood, Essex, we were also introduced to builders and tradespeople through Kirkwood, and they were excellent—professional, respectful, and a pleasure to work with. If we ever take on another project, we wouldn’t hesitate to use them again.
We now have an amazing extension, and would be happy to use the team again.







Very knowledgeable and contactable throughout the process.
Couldn't ask for a better outcome and value for money.
Will definitely be recommending and 100% will use again!
5 star!!!

Why choose our architectural design services?
Our core company value is honesty. Thats why we provide you with expected home extension build costs upfront. We know this may deter some customers as often, they are unaware of how much things cost. We dont look at that as a failure, we look at that as a success. Our first job is to help, and if a job comes from that, then it’s a bonus. Our architectural design service covers all areas in Essex, including Brentwood, Chelmsford, Billericay, Rayleigh, Leigh-on-sea, Southend, Thurrock, Hornchurch, Maldon, Colchester, Benfleet, Wickford, Basildon, and the list goes on. Contact us today for more information and prices.
Decades of industry experience
Our teams combined experience technically makes us ancient. We should be in a museum, not providing a home architectural design service in Essex. This is good news for you because it means we’ve already made every mistake under the sun. We see ourselves now as a company setting the standards for other companies to follow. Through honesty and transparency, we lead the way.
Customised Solutions for Every Home
No two jobs are the same, in fact they’re much like fingerprints. Our first job is to listen to the customers needs and seen what is possible with the property we can advise on the type of house extension that would best suit and most likely be approved by the local authorities.
Comprehensive Design to Build Support
Once we have the design done, submitted and to your satisfaction, we don’t stop there. We like to know our architectural design service customers move into safe hands so we have a few reliable builders we can pass you to. We can support you with all the questions in the world, just pick up the phone and drop us a call.
Our Architectural Design Process
In our eyes, there is only one way to do each job and thats the right way. We treat projects as if they were our own. If we can think of ways to save you money and hassle we will advise and try to steer you in the direction that will get you to where you’ve told us you need to be. An architectural design service can be a fun and exciting experience.
Initial Consultation and Site Visit
If you have received a quote from us already you’ll know how competitive we are. To save on costs we can provide you 90% of the answers before making a site visit. We do this by researching your property and viewing it on google earth. We can see what neighbouring properties have had done which gives us good insight into planning oportuities.
Concept Development and Drafting
Once youve gave us the green light, we start the survey. This is where we measure every nook and cranny so we can first draw the existing. Once thats done we can then start playing with some design ideas for the proposed work. We won’t stop designing until we have something you love. This is usually achieved in the first draft or sometimes the second.
Planning Permission and Regulations
With regulations constantly changing in Essex, its worth working with a company that has its ear to the ground. We make sure every project complies and always gain some form of approval from the council just to make sure. Although not always required, we can offer building regulation drawings. If you’re not willing to risk leaving it to your builder how to construct your home extension, let us do it for you. An architectural design service should not just end there. We can help with structural calculations too.
Preferred choice for architectural design service in Essex
We ask every customer to leave us a honest review. Not everyone gets round to it but the ones that do we thank you. Not because they are all 5 star but because it helps future customers navigate their way through this sometimes tricky industry. We live in a busy world but if you do get time, all we ask is for a honest feedback.
Frequently asked questions
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Do I need an architect for my house extension?
While it’s not a legal requirement, using an architect like Kirkwood ensures your house extension is well-designed, fully compliant, and practical to build. We help you avoid costly mistakes, manage planning and structural stages, and bring ideas to life with professional drawings.
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How much do architectural plans cost for a house extension?
Architectural plans typically range from £1,500 to £2,200 depending on the size and complexity of the extension. At Kirkwood, we’ll give you an exact quote after a free consultation and ensure your drawings are planning-ready and buildable.
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What’s included in Kirkwood’s architectural design service?
Our architectural design service covers everything from initial concept drawings to planning submission, building regulations, and structural design. We take care of the full design process so you don’t have to deal with multiple companies.
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How long does it take to get architectural drawings for a house extension?
At Kirkwood, we typically deliver your architectural drawings within 2–3 weeks after the initial survey and design call. The exact timing depends on the scale of the project, but we always work to keep your extension moving forward without delays.
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Straight-talking architecture
Areas We Cover in Essex
We’re proud to help homeowners all across Essex. Some of the areas we serve include:


