Brentwood Architects.
Essex's No.1
Brentwood's #1
architectural design firm
With the highest number of
5-star Google reviews
A secure and dependable company you can trust
A hassle-free service, packaged just for you
No matter where you are in Essex, we’re ready to assist
Precision-driven architectural design that delivers.
With 5,000+ projects to our name
Start your project the right way
No fluff, just well designed home extensions
Kirkwood is a family-run company with expert knowledge in house extensions and loft conversions. As trusted architects in Brentwood, we guide you on build costs upfront, connect you with top-quality builders, and deliver high-quality designs at an affordable price. Find out how much a house extension costs. Our unique approach keeps costs down without cutting corners, offering a fast, efficient, and transparent service for a stress-free extension. Need help choosing a trustworthy builder? Read our guide.
- Avoid costly build errors
- Prevent council disputes
- Access reliable builders
See what our customers are saying on Google Reviews
Key design elements for home extensions in Brentwood
When planning a home extension in Brentwood, there are a number of key factors to consider. To ensure the best results, our architects focus on the following design elements. For more info on how to find the right architect in Brentwood, click here.
Light and ventilation
Natural light and ventilation are essential for a comfortable home extension. Even in a north-facing space, we can maximize daylight with large roof windows or strategically placed side windows. For ventilation, trickle vents in doors and windows ensure a steady, subtle airflow without drafts.
Design & layout
This is where a good architect earns their money. With endless design possibilities, there’s really only going to be one winning layout—and we know how to find it. We’ve designed more extensions than you’ve had hot dinners, so let us put that experience to work for the benefit of your home.
Materials for the job
Some materials cost a lot more than others. We can show you different finish options and advise on how they will impact your house extension build costs. The three main external finishes are brick, render, and cladding—each capable of delivering a stunning result when designed and installed properly.
Architectural design in Brentwood
We’ve been designing home extensions in Brentwood for years, so if you’re looking for experienced architects who know the local planning process inside out, you’re in the right place. We’ve secured planning approval for single-story extensions, loft conversions, double-story extensions, garage conversions, and garden rooms. For more details, see our Pitched Roof vs Flat Roof Extension Guide.
Essex architects
Designing a great-looking extension is easy—keeping it within budget is the real challenge. That’s where we come in. We help cut unnecessary costs by sourcing affordable builders, designing with less steelwork, avoiding over-engineered structural plans, and advising on cost-effective roof styles. Plus, Kirkwood customers get exclusive access to our trade-priced suppliers for roof windows, doors, and kitchens, saving you thousands.If you’d like a free call with our house extension and loft conversion adviser, get in touch today. We specialise in all types of house extensions, including loft conversions and contemporary single storey extensions.
If you’d like a free call with our house extension and loft conversion adviser, get in touch today. We specialise in all types of house extensions, including loft conversions and contemporary single storey extensions.
Key steps to building a home extension in Brentwood
Local architects
Your project will need some form of approval or certification. Working with a local architect who knows the process can save you a lot of hassle. Not all councils interpret permitted development the same way, so don’t take the risk—get professional advice. And no, that doesn’t mean ask your builder!
Neighbours
Love thy neighbour—easier said than done. A quick chat before they get a council notice can make all the difference. We've heard it countless times: "I just wish they had told me first." A frustrated neighbour can request a party wall surveyor—on your dime. A simple heads-up can save you time, money, and hassle.
Finding builders
The right builder will tell you to find a good architect. We've yet to meet a builder who fully understands the legal and approval process. Reliable, affordable builders are like gold dust—but we have a few you can trust. We wouldn’t recommend them if we weren’t completely confident they could deliver—we’ve got a 5-star reputation to maintain.
House extension costs in Brentwood
Recommendations
The best way to find a good builder is through word of mouth. If you’re struggling, we have three trusted local builders in Brentwood who won’t let you down. Key tip to keeping costs down
£2K per m2 rule
Gone are the days of building a single-story extension in Brentwood for £1,500 per m². Costs can now reach £2,400 per m² if piling is needed for the foundations.
Additional costs
All projects need structural calculations for foundations, roof, and steelwork. Costs vary, but for a single-story extension, expect to pay around £1,000–£1,500.
If you're in Brentwood and looking for an experienced Brentwood architect, get in touch today for free advice on your home extension.
Our team is passionate about helping, and we don’t charge for advice—so what are you waiting for? Contact us at Info@kirkwoodbuild.co.uk or call 01268 944233 to schedule your free consultation and take the first step toward your Brentwood home extension.
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