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Project Type
What are you looking to do?
Single-storey extension
Ground floor only
Double-storey extension
Ground + first floor
Side return / wrap-around
L-shaped extension
Loft conversion
Convert attic space
Garage conversion
Garage to living space
Full refurb + extension
Complete renovation
New build
Build from scratch
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Location & Property
Postcode
Property type
Select property type
Semi-detached
Detached
Terraced
Flat
Will the property be occupied during works?
Yes
No
This may affect logistics and pricing
Conservation area / listed building?
No
Yes
Unsure
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Size & Area
Ground floor new area (sqm)
sqm
Enter the new ground floor area
First floor new area (sqm)
sqm
Loft new area (sqm)
sqm
Rooms being created
Bedrooms
-
0
+
Bathrooms
-
0
+
Utility rooms
-
0
+
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Structure & Openings
Knock-throughs to existing house?
None
No knock-throughs needed
Small opening
Standard doorway or pass-through
Large open-plan (steelwork)
Requires structural steel
Steelwork required?
No
Yes
Unsure
Glazing level
Standard windows
Normal window openings
Large bifolds / sliders
Premium sliding doors
Extensive glazing
Lots of glazing / corner glazing
Roof type
Select roof type
Flat
Pitched
Flat with lantern(s)
Parapet / complex roof
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External Finish
External wall finish
Brick
Render
Cladding
Mixed
Match existing materials?
Yes
No
Roof covering
Select roof covering
Match existing
New tiles
EPDM / GRP
Feature elements (optional)
Bay window
Porch
Balcony
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Internal Specification
Choose a specification level
Basic
Standard finishes, budget-friendly
Mid-range
Quality finishes, good value
Premium
High-end finishes throughout
Underfloor heating
None
Partial
Full (all new area)
Kitchen included in works?
Yes
No
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Services (MEP)
Heating changes
Select heating scope
Extend existing system
New boiler
Heat pump
UFH manifold needed
Electrical scope
New circuits only
Partial rewire (affected areas)
Consumer unit upgrade
Relocate kitchen?
Yes
No
Add utility room?
Yes
No
Soil stack / drain changes?
Yes
No
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Groundworks & Drainage
Drains/manholes in the build area?
No
Yes
Unsure
Drain relocation likely?
No
Yes
Unsure
Ground type (if known)
Select ground type
Unsure
Clay
Sand
Made ground
Trees near foundations?
None
Some
Large / close trees
New service connections required? (optional)
Water
Electric
Gas
Sewer
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Access & Logistics
Can a skip be placed on the drive/site?
Yes
No
Affects waste removal logistics
Access to rear
Wide side access
Large vehicles can reach rear
Narrow side access
Limited vehicle access
No access (through house only)
Materials carried through property
Parking restrictions / permits likely?
Yes
No
Scaffolding complexity
Simple
Moderate
Complex
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Design & Permissions
Do you already have drawings?
Yes
No
In progress
Planning status
Select planning status
Not started
Submitted
Approved
Permitted development
Include professional fees in estimate?
Yes
No
Architect, structural engineer, planning costs
Target start date (optional)
Target completion (optional)
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Your Details & Summary
Your details
Full name
Email
Phone
Project address / postcode
Notes (optional)
I agree to be contacted about this estimate
Yes
No
Summary
Likely estimate
£0
Range
£0 - £0
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Demo: submissions are logged to console. Hook to your CRM endpoint.
Budget estimate only. Final pricing depends on drawings, structural design, and site survey.
Likely estimate
£0
Range: £0 - £0
Breakdown
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Estimate breakdown
Likely
£0
Range
£0 - £0
Assumptions
Budget estimate only - final price depends on drawings, structural design and site survey.
Groundworks/drainage treated as an allowance unless confirmed.
VAT excluded in this demo (easy to add).
Notes
Pricing variables are editable in the
RATE_CARD
object in the script.