“We were convinced we needed an extension. PlanBuild showed us we could get everything we wanted by working with the space we already had. Best £30 we ever spent.”Sarah & JamesHomeowners, Poole
Poole & Dorset’s home extension specialists — design, planning and build under one roof. Talk to the team →
Home extensions and renovations · Poole, Dorset
Extension Specialists.
Clarity for every step of your extension.
Renovation floor plans from £29.99. Extension projects from £250 — remote service, fixed price, no obligation.
✓ Money-back guarantee · No lock-in
Rear extensionSide returnOpen-plan kitchenWraparound
Trusted by Poole homeowners since 2017· 0800 056 7069
Where are you with your project?
Fixed prices, no surprises
Local team in Poole
No lock-in, ever
Fast turnaround
Based in Poole since 2017
Since 2017
Based in Poole
5★
Checkatrade reviews
One team
Design to build
Fixed price
No surprise invoices
What you get
Everything included, nothing hidden
Every package has a fixed price and a clear list of deliverables. No hourly rates, no percentage fees.
Renovation Floor Plan
Fixed price
- 2–3 professional layout options
- Before & after floor plans
- Drawn to scale by our Poole team
- Delivered to your private portal
- Unlimited revisions until happy
- Money-back guarantee
Extension Design Pack
Fixed price
- Site assessment & feasibility check
- Scaled floor plans & elevations
- Planning route recommendation
- 3D visualisation available
- Revision rounds included
- Money-back guarantee
Build-Ready Package
Fixed price
- Structural calculations
- Building regulations drawings
- Planning application support
- Party Wall guidance
- Builder introduction
- Single point of contact throughout
A structured path from sketch to handover
Your project, stage by stage.
Every stage is independently priced. Start anywhere, stop whenever you like. One team throughout.
Stage 1
See your new home before the first brick
Fixed price · No surprises
Share your Rightmove link or some photos of your home. Tell us what you want — more light, a bigger kitchen, a playroom for the kids.
Our Poole-based drafters draw 2–3 professional floor plan options showing your home before and after. Not AI renders — real drawings by real designers. Delivered to your private portal within 7 working days.
This is where most projects start. You get clarity on what's possible — a drawing you can show your partner, your builder, or your bank.
Common concern: Not sure what's possible? We'll show you before you commit to anything.
Hands-on?Just need plans? Stop here — they’re yours to keep.
Time-poor?Want us to handle the next steps? Keep scrolling.
Before
Kitchen
Lounge
Dining
After
Open-plan kitchen & living
Utility
Study
Want to see what YOUR home could look like?
Stage 2
Review, refine, and choose your direction
Fixed price · No surprises
Your floor plan options land in a private portal. Review them at your pace — no sales calls, no pressure.
Tell us what to change. Want the island bigger? Need a utility room? We revise until you’re happy.
This is also where you decide how far to go. Some homeowners stop here with a great set of plans. Others ask us to handle structural engineering, planning permission, or building regulations.
Common concern: Am I locked in? No. Every stage is independently priced. Buy what you need, stop when you want.
Hands-on?DIY project? Take your plans to any builder.
Time-poor?Prefer one team? We’ll quote the next stage.
What matters most to you?
Stage 3
Structural calcs, planning permission, building regs — sorted
Fixed price · No surprises
This is the part most homeowners dread. Will the council approve it? Do I need a structural engineer? What about Party Wall agreements?
We coordinate everything: structural calculations, planning applications, building regulations submissions, and any specialist surveys. Fixed prices at every step — no surprises.
You pick which services you need. Knocking through an internal wall? You might only need structural calculations. Full rear extension? We'll handle the lot.
Common concern: Is this cheaper than hiring an architect? Yes — we combine design and technical work under one roof. No architect fees, no coordination headaches.
Hands-on?Know your way around planning? Just buy the bits you need.
Time-poor?First time? We guide you through every step.
What do you need?
Get a personalised quote — no obligation
Stage 4
One team from first sketch to final handover
Fixed price · No surprises
We introduce vetted local builders from our network — people we’ve worked with on dozens of Dorset homes. Not a directory. Not a marketplace. Our builders.
We stay involved through construction. Milestone payments, progress check-ins, and snagging reviews before you sign off. One accountable team from design to keys.
This is what makes PlanBuildCo different. We designed it, so we know exactly how it should be built.
Common concern: What if I already have a builder? That’s fine. Our plans work with anyone. But if you want accountability all the way through, we’re here.
Hands-on?Already have a builder? Our plans work with anyone.
Time-poor?Want the full package? One call gets everything moving.
Tell us about your project in 30 seconds
We’ll send a personalised roadmap with estimated costs and timeline for your area.
How we compare
Why homeowners choose PlanBuildCo
vs Hiring an architect + builder
Hiring an architect costs £2,000–£5,000 before a single brick moves. Then you find a builder separately and hope they interpret the drawings correctly. Two relationships, two invoices, no single point of accountability.
We design AND build. One team, one price, one point of contact. From first sketch to final handover.
vs Online plan tools
Floorplanner and RoomSketcher are fine for rearranging furniture. But they don’t produce buildable drawings, structural calculations, or planning applications. You still need a professional before any work starts.
Our plans are drawn by qualified drafters in Poole. They’re ready for builders, councils, and structural engineers — not just Pinterest.
vs Doing nothing
The biggest reason projects stall isn’t money — it’s not knowing where to start. Should I hire an architect? Do I need planning permission? How much will it really cost? The questions pile up and nothing happens.
Start with a conversation. We’ll tell you exactly what’s possible for your home, what it costs, and what order to do it in.
Transparent pricing
How PlanBuildCo compares
Same outcome, different routes. See how our fixed-price approach stacks up against traditional methods.
Initial design / floor plans
PlanBuildCo
From £29.99
Architect
£2,000–£5,000
Builder
Not included
Extension design pack
PlanBuildCo
From £250
Architect
Included in fee
Builder
Not included
Structural calculations
PlanBuildCo
£350
Architect
£500–£1,500
Builder
£500–£1,500
Planning application
PlanBuildCo
£2,200
Architect
£1,500–£4,000
Builder
You arrange it
Building regulations
PlanBuildCo
£399
Architect
£500–£2,000
Builder
£500–£2,000
Builder introduction
PlanBuildCo
£149
Architect
You find your own
Builder
N/A
Design revisions
PlanBuildCo
Unlimited until happy
Architect
2–3 rounds typical
Builder
Not applicable
Single point of contact
PlanBuildCo
Architect
Builder
Fixed, transparent pricing
PlanBuildCo
Architect
Builder
Money-back guarantee
PlanBuildCo
Architect
Builder
Online portal for reviews
PlanBuildCo
Architect
Builder
Design to build handover
PlanBuildCo
Seamless — one team
Architect
You coordinate
Builder
Builder interprets plans
Typical timeline to start
PlanBuildCo
7 working days
Architect
4–8 weeks
Builder
Varies
Typical total design cost
PlanBuildCo
£30–£3,950
Architect
£3,000–£12,000+
Builder
£1,000–£3,000
Why PlanBuildCo
Everything handled. Nothing missed.
Most homeowners don’t know what they don’t know. We do — and we handle all of it so you don’t have to.
One team, start to finish
We design it and we build it. No handover headaches, no crossed wires between your architect and your builder. One point of contact throughout.
No guesswork on cost
Every stage has a fixed price agreed before we start. No hourly rates, no percentage fees, no invoices that surprise you halfway through a build.
We handle the paperwork
Planning applications, building control, structural engineering — we coordinate all of it. You don't need to know who to call or what order to do it in.
Real results
Real work on real homes.
RenovationVictorian Terrace Open-Plan Transformation
Poole, BH15
Challenge: The owners had a dark, narrow kitchen separated from the living room by a load-bearing wall.
Solution: We identified that removing a section of the load-bearing wall with a steel beam would open the space without any external building work.
Internal reconfiguration6 weeks£29.99
“We were convinced we needed an extension. PlanBuild showed us we could get everything we wanted by working with the spac...”— Sarah & James
ExtensionSingle-Storey Rear Extension with Garden Room
Bournemouth, BH8
Challenge: A young family needed more living space but had a tight budget and wanted to avoid a lengthy planning process.
Solution: We confirmed the extension fell within Permitted Development limits (under 4m for a single storey).
Single-storey extension4m x 6m (24m²)£2,400
“I was dreading the whole planning process. PlanBuild made it feel like ordering something online — choose what you want,...”— Mark
Before you start
Common questions
Is £29.99 really the full price for a floor plan?+
Yes. You get 2–3 professional before-and-after floor plan options delivered to your private portal. No hidden fees. If you’re not happy, money back.
Am I locked into the whole build process?+
No. Every stage is independently priced. Buy just a floor plan, or add structural calcs, or go all the way to build. Stop whenever you like.
Are these plans actually usable by builders?+
Yes. Our plans are drawn by qualified architectural drafters, not AI. They include dimensions, annotations, and are ready for builders, structural engineers, and council submissions.
What if I already have an architect or builder?+
That’s fine. Many customers buy just the floor plan or just the structural calcs. Our deliverables work with any professional.
How is this different from using Floorplanner or RoomSketcher?+
Online tools are great for visualising furniture layouts. Our plans are professional architectural drawings suitable for planning applications, building regulations, and construction.
What’s the turnaround time?+
Standard delivery is 7 working days. Need it faster? Priority delivery is available as an upgrade at checkout.
Do you cover my area?+
We serve Dorset, Hampshire, and Wiltshire. Based in Poole, we know local planning authorities and building regulations inside out.
Buyer’s guide
10 things to check before hiring anyone
Whether you choose us or not, protect yourself. These are the questions most homeowners forget to ask.
1
Get a fixed price in writing
If anyone quotes “8–15% of the build cost” that’s an open-ended bill. Demand a fixed number before signing anything.
2
Understand the design process
Ask how the company produces your plans and what tools they use. Good firms are transparent about their workflow — modern technology often means faster delivery and lower cost for you.
3
Know what’s included before you pay
Get a clear scope of work in writing: how many layout options, what file formats you’ll receive, and what counts as an extra. Hidden extras are how cheap quotes become expensive projects.
4
Understand what “design” doesn’t include
A pretty drawing is not a building plan. Structural calculations, building regs drawings, and planning submissions are separate — and expensive if quoted later.
5
Verify their insurance
Professional indemnity insurance protects you if plans are wrong. Ask for the certificate — not just a claim on a website.
6
Ask about the planning route
Permitted Development vs full planning application changes your cost and timeline dramatically. A good designer checks this before you spend a penny on design.
7
Ask how you’ll be kept updated
Projects go wrong when communication stops. Ask whether you get a dedicated portal, regular updates, or just an email thread you’ll lose track of.
8
Check reviews on independent platforms
Website testimonials can be curated. Check Google, Trustpilot, or Checkatrade for reviews the company can’t edit or remove.
9
Ask who coordinates with the builder
The handover from design to build is where most projects go wrong. Find out who’s responsible for making sure the builder interprets the plans correctly.
10
Check the money-back guarantee
If you’re paying upfront, make sure there’s a written guarantee. A company confident in their work will offer your money back if the first deliverable doesn’t meet expectations.
Not ready to buy?
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From the Knowledge Hub
Free guides to get you started
J
Meet the founder
Josh · Founder, PlanBuildCo
Founded in Poole in 2017 to make home design accessible. Every plan is reviewed by our team before delivery — real people drawing real plans for real homes.
As featured in
Dorset Echo
Checkatrade
Houzz
MyBuilder
Trustpilot
What homeowners say
Real results from real projects.
“I was dreading the whole planning process. PlanBuild made it feel like ordering something online — choose what you want, pay a fixed price, and it just happens.”MarkHomeowner, Bournemouth
Ready to get started?
Tell us what you’re planning. We’ll call you back and talk through exactly what your project needs.
Every plan drawn by qualified drafters in Poole, Dorset. Covering Dorset, Hampshire and Wiltshire.