Pentangle Design - Architects

Pentangle Design - Architects We're an RIBA chartered practice of architects in Hitchin.

Here’s the revised draft:Planning application submitted — Hitchin house transformationWe’ve just submitted a planning ap...
09/06/2026

Here’s the revised draft:

Planning application submitted — Hitchin house transformation

We’ve just submitted a planning application for this substantial remodelling of a detached house in Hitchin. Our clients are purchasing the property with a clear vision for what it can become — and this is it.

The proposals include:

• New master suite at first floor
• Single storey rear extension replacing an existing conservatory, creating an open plan kitchen and living space
• Home study
• Reworked landscaping, working with the existing hill
• General refurbishment throughout

The CGI gives a strong sense of the intended character — a crisp, contemporary result from a fairly modest starting point.

If you own a property — or are about to — and you’re thinking about what it could be, we’d be happy to talk it through.

📞 01462 431133
✉️ [email protected]
🌐 www.pentangledesign.co.uk

Visualisation produced using AI-assisted rendering from our Revit model.

07/06/2026

From eye level to the skies — a completed project at Gustard Wood, Hertfordshire, brought back to life through new visualisation technology. 🏡

The scheme involved a substantial remodelling and extension of an existing house — the glazed garden room, loft conversion and landscaping you can see here are all part of what we designed and delivered for our clients.

Fast forward to now, and we’re using AI rendering to create flythrough visualisations like this directly from our 3D models. We couldn’t have produced anything like this at the time — so it felt worth revisiting.

👀 Watch closely — some plant pots make a brief, unexplained disappearance mid-video. We’re blaming the technology. (We’re still learning.)

Thinking about extending or remodelling your home? We’d love to hear about your project.

📞 01462 431133
📧 [email protected]
🌐 www.pentangledesign.co.uk

Before: a derelict agricultural barn, corrugated roof, bare concrete, no obvious future.After: a clifftop home on the Be...
06/06/2026

Before: a derelict agricultural barn, corrugated roof, bare concrete, no obvious future.
After: a clifftop home on the Berwickshire coast with views across the North Sea.

The original stone and timber structure does most of the talking — we just made sure it had something worth saying.

📍 Cockburnspath, Scottish Borders
🏗️ Completed 2021

Not every redundant building needs to come down.Westbury School, Letchworth — a fine inter-war building in a conservatio...
02/06/2026

Not every redundant building needs to come down.

Westbury School, Letchworth — a fine inter-war building in a conservation area, closed and surplus to requirements. We prepared the feasibility and planning for its conversion into 39 homes, retaining the best of the original and adding sympathetic new houses within the grounds.

Planning granted 2010. Now built and lived in.

Here’s the draft:🏠 Application just submitted — Hitchin extensionA growing family in Hitchin wanted more from their home...
26/05/2026

Here’s the draft:

🏠 Application just submitted — Hitchin extension

A growing family in Hitchin wanted more from their home without leaving it. The brief: a new master suite, and a generous open-plan kitchen and living space that finally does justice to the garden.

Our solution is a two-storey side and rear extension that works in honest contrast to the existing house — warm brick against the rendered original, new reading clearly as new. The ground floor opens directly onto a stepped terrace, blurring the line between inside and out. Working with the clients to achieve their dream.

Planning application submitted. Watch this space.

🔑 Thinking about extending?
If your home isn’t quite keeping up with your life, we’d love to help you work out what’s possible.

📞 01462 431133
📧 [email protected]
🌐 www.pentangledesign.co.uk

📍 Hitchin, Hertfordshire

🏡 From one house to three — Welwyn VillageA family came to us with a single house on a steep, wooded plot on London Road...
22/05/2026

🏡 From one house to three — Welwyn Village

A family came to us with a single house on a steep, wooded plot on London Road, Welwyn Village. The potential was obvious — but so was the challenge.

The hillside setting meant that simply replacing the house wasn’t straightforward. Our solution was to cut the new homes into the slope, reducing the level change up to the site and letting the development sit naturally within its surroundings rather than imposing on them.

We took the project from the initial design concept through planning permission — then continued to work with the developer who purchased the site to deliver the full construction package and the finished scheme

The result: three generous family homes in a beautifully landscaped setting, replacing one.

🔑 Got a plot with potential?
Whether you’ve inherited a property, own land you’re not sure what to do with, or simply think your site could work harder — we’d love to have a conversation.

📞 01462 431133
📧 [email protected]
🌐 www.pentangledesign.co.uk

📍 Welwyn Village, Hertfordshire

Step inside before a brick is laid.We can now produce detailed interior visualisations across our projects — letting cli...
14/05/2026

Step inside before a brick is laid.

We can now produce detailed interior visualisations across our projects — letting clients see the spaces we’ve designed for them, properly, before construction starts.
It’s more than a nice picture. These views become a working tool:

🪵 Test materials and finishes in context — does that floor work with the wall colour
🎨 Help shape decisions on palette, joinery and detail as the design develops
🛠️ Spot the things you’d otherwise only notice on site, when changes get expensive

Swipe through for a range of recent interiors — a barn conversion, contemporary new-build, urban extension, family playroom, and two dressing rooms shown in alternative finishes.

If you’re thinking about a project and want to see it before you commit, we’d love to talk.
📞 01462 431133
✉️ [email protected]

(Swipe for the proposals). Application Submitted! Out with the old conservatory, in with something worth having.We’ve j...
12/05/2026

(Swipe for the proposals). Application Submitted! Out with the old conservatory, in with something worth having.

We’ve just submitted a planning application for a rear extension to a detached house in the historic core of Letchworth — a house of special interest to the Heritage Foundation, so the design had to work hard.

Two options were considered: a contemporary flat-roof glazed scheme, or a more traditional approach, that sits naturally with the existing Arts and Crafts character. The traditional approach won-out.

The result opens up the kitchen-living space, connects the sitting room and study, and gives the house the ground floor it deserves, while providing a good connection to the garden. A utility space in the rear of the garage is a bonus.

Now with North Herts and the Heritage Foundation. Fingers crossed 🤞

📞 01462 431133
✉️ [email protected]

🏗️ A busy week on site — three very different projects, one common thread: getting the details right.This week we’ve bee...
09/05/2026

🏗️ A busy week on site — three very different projects, one common thread: getting the details right.
This week we’ve been out visiting three of our current projects at various stages of construction, and it’s always great to see designs coming to life.

📍 Letchworth — New Build, Nearing Completion
Our contemporary new-build is looking fantastic from the air — drone shots don’t lie! Clean lines, a striking dark roof, and integrated solar panels making this one as sustainable as it is good-looking. Nearly there… watch this space.

📍 Hitchin — Extension & Refurbishment
Mid-build organised chaos at its finest. Steel frames, exposed brickwork, and a roofer brave enough to give us a wave from the top. This one’s going to be a real transformation when the scaffolding comes down.

📍 Ealing — Extension & Refurbishment
A handsome Victorian property undergoing some significant work. The existing basement is being transformed with a lowered floor level, a new rear extension will open up the back of the house, and improved connections to the garden will make the most of the outdoor space. A project that’s really about unlocking the full potential of a fantastic period home.

Three towns, three briefs, three great clients. This is what we love about the job.
💬 Thinking about your own project? We’d love to hear from you.

📞 01462 431133
📧 [email protected]

Every home in Letchworth Garden City has its own character. Our job is to understand it — and make sure any extension fe...
07/05/2026

Every home in Letchworth Garden City has its own character. Our job is to understand it — and make sure any extension feels like it always belonged there.

These CGI visualisations show four recent projects across the town, each one designed to sit sympathetically within the Arts & Crafts tradition that makes Letchworth so special. From front door to rear garden, the detailing matters: rooflines, materials, window proportions, brick and render — nothing is an afterthought.

As one of the most active architectural practices working in Letchworth — with over 20 Heritage Foundation applications in the last five years — we know what it takes to get a scheme approved. That experience means we design with consent in mind from the very first conversation, saving our clients time, cost and uncertainty.
Thinking about what your home could become? Give us a call or drop us an email — we’re always happy to talk through the possibilities.

📞 01462 431133
📧 [email protected]
Visualisations shown are CGI design images

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Suite 1 21 Bancroft
Hitchin
SG51JW

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