Fully Managed · UK residential projects
OneSpec Done For You
Your plans. Our construction team. One clearer tender.
Prefer to leave it to the professionals? We prepare and refine your Schedule of Works & Specification, organise invitations to your nominated builders and explain the differences in their returned quotations.
From £795 including VAT, typical domestic extension
Let OneSpec Handle ItSubject to assessment and a fixed-fee proposal. No payment is taken at enquiry.
Construction experience. Intelligent technology.
Real people make the important decisions.
AI helps us work efficiently. Our construction team checks the draft Schedule of Works and analysis before approved documents are released. Missing or ambiguous details remain clearly marked To Be Confirmed.
- Initial project assessment and review of your information
- AI-assisted Schedule of Works & Specification, professionally reviewed and refined
- Clarification of outstanding project decisions
- Tender documents and invitations to up to three client-nominated builders
- One round of tender clarifications
- Collection and comparison of returned quotations
- Team-checked analysis of material price and scope discrepancies
- Tender Comparison Report and 30-minute online consultation
From first enquiry to informed decisions
01
Tell us about your project
Upload your information securely for assessment.
02
Agree the scope and fee
Our team prepares a fixed-fee proposal before any commitment.
03
Prepare and review
A professional checks the descriptive Schedule of Works before release.
04
Tender, compare, discuss
Your nominated builders price one scope. Our team reviews returns and discusses the findings.
Managed delivery is being prepared. We currently accept assessment enquiries; service availability and stages must be confirmed before an order.
Indicative project fees
All prices include VAT and are subject to assessed complexity and agreed scope. Your selected project type does not trigger a charge.
- Small alterations or straightforward renovations
- £495–£695
- Typical domestic extension
- £795–£995
- Large extension or major refurbishment
- £1,195–£1,495
- New-build home or complex project
- £1,495–£2,495+
Clear boundaries
Not automatically included:
- Site visits
- Architectural or engineering design
- Measured bills of quantities
- Structural calculations
- Planning or building control submissions
- Contract administration or independent certification
- Unlimited revisions or builder correspondence
- Finding or recommending builders
- Guaranteed builder participation or tender return dates
Additional services may be quoted separately. OneSpec does not guarantee the lowest price, cost certainty, builder performance or statutory compliance.
Expert Reviewed, from £349 including VAT
Tell us about your project
We will assess your information and confirm the most suitable service and fixed fee. No payment is requested.