Lets Build It Together
Lets Build It Together
We are an architectural design and technical consultancy providing planning, Building Regulations and construction-stage support services across residential and commercial projects.
OUR FEES
Our Fees for Architectural Services
Transparent. Professional. Aligned with Leading UK Architectural Practices.
At Sphion, our fees reflect the level of expertise, technical rigour, and professional responsibility required to deliver high-quality architectural, surveying, and compliance services. Our pricing structure is aligned with 2026 rates for UK architectural practices and is tailored to the complexity, risk profile, and scope of each project.
Our Service Fees
Director-Level Architectural Consultation - £250 - £350 per hour
Design & Technical Advisory (Associate Level) - £150 - £225 per hour
Site Inspection / Compliance Visit - £350 – £500 per visit
Measured Building Survey (Residential) - £325 – £450
Service Fee Range (excl. VAT)
Minor Alterations / Internal Reconfiguration - £4,500 – £7,500+
Major Renovation Projects - £8,000 – £13,000+
Single-Storey Extension – Planning Only - £4,500 – £7,000+
Single-Storey Extension – Planning + Building Regulations - £6,000 – £9,000+
Two-Storey Extension – Planning Only - £6,500 – £9,500+
Two-Storey Extension – Full Design & Regulations - £8,000 – £12,000+
Loft Conversion (Standard) - £5,500 – £8,500+
Hip-to-Gable / Complex Loft - £6,500 – £9,000+
Garage Conversion - £4,500 – £7,000+
Outbuildings / Wrap-Around Extensions - £5,500 – £8,500+
Scope of Service Typical Fee
Full Architectural Service (RIBA Stages 0–6) 10% – 15% of construction cost
Planning-Only Service 3% – 5%
Technical Design & Building Regulations 4% – 7%
Contract Administration / Site Oversight 2% – 4%
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Percentage-based fees are commonly applied to new-build dwellings, complex renovations, commercial projects, and high-value residential developments, reflecting increased coordination, professional risk, and statutory responsibility.
Service Indicative Fee
Planning Appeals £3,000 – £6,000+
Listed Building / Heritage Advice £4,000 – £8,000+
Sustainability & Net-Zero Strategy £2,500 – £5,000+
Additional Design Revisions / Dayworks £150 – £275 per hour
Important Fee & Contract Information
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All fees are exclusive of VAT, which will be charged at the prevailing rate.
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Fees are indicative and subject to confirmation via a written fee proposal and professional appointment.
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Services are provided strictly in accordance with an agreed written contract, typically based on industry-standard architectural appointments or bespoke terms issued by Sphion.
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The scope of services is limited to those expressly defined within the appointment. Any additional services, variations, or scope extensions will be agreed in writing and may incur additional fees.
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Statutory fees, third-party consultant costs (e.g. structural engineers, planning fees), surveys, reports, and disbursements are not included unless explicitly stated.
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No construction work, warranties, cost certainty, or contractor performance is implied unless expressly stated within the appointment.
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Design services do not constitute a guarantee of planning approval or regulatory consent.
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Liability is limited in accordance with the agreed professional appointment and applicable legislation.
Every project is unique.
We provide tailored fee proposals reflecting your project’s complexity, risk profile, and programme.
To request a detailed fee proposal or arrange an initial consultation, please contact Sphion directly.
Building Surveying Fees
​Sphion provides a range of professional building surveying services in accordance with recognised industry standards, including RPSA-aligned residential surveys and bespoke commercial inspections.
All fees below are indicative only and are subject to confirmation following review of the property type, size, location, access arrangements, and scope of inspection.
Survey Type - Indicative Fee (excl. VAT) - Description
Condition Survey (Level 1 Equivalent) - £450 – £650+- A visual, non-intrusive inspection identifying significant defects, condition issues, and urgent maintenance matters. Suitable for modern or conventional dwellings in reasonable condition.
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Home Condition Survey (Level 2 Equivalent) - £650 – £950++ - A more detailed inspection including condition ratings, commentary on defects, advice on repairs, and maintenance considerations. Suitable for most residential purchases.
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Building Survey (Level 3 / Full Survey) - £950 – £1,750+ - A comprehensive inspection of the building fabric, structure, services (visually inspected), defects, causes, and remedial recommendations. Recommended for older, altered, or non-traditional properties.
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Fees may increase for larger dwellings, listed buildings, complex construction, or restricted access.
Specialist Residential & Compliance Surveys
Service - Indicative Fee (excl. VAT)
Defect Analysis & Cause Investigation - £450 – £950+
Damp, Condensation & Mould Assessment - £395 – £695+
Structural Condition Inspection (non-engineer) - £495 – £850+
Pre-Purchase Defect Advisory Report - £450 – £750+
Schedule of Condition (Residential) - £495 – £850+
Snagging Inspection (New Build) - £395 – £1050+
Commercial & Non-Domestic Surveys
Service - Indicative Fee (excl. VAT)
Commercial Building Survey -£1,250 – £3,500+
Dilapidations Advice (Initial Inspection) - £750 – £2,500+
Planned Preventative Maintenance (PPM) Survey - £1,500 – £4,000+
Condition Surveys for Landlords / Portfolios - By proposal
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Commercial fees are dependent on floor area, construction type, occupancy, and reporting requirements.
Statutory & Regulatory Inspections
Service - Indicative Fee (excl. VAT)
Housing Health & Safety Rating System (HHSRS) Inspection - £450 – £850+
Pre-Completion / Compliance Inspection - £350 – £500+ per visit
Building Regulation Compliance Review (Desktop) - £395 – £750+
Important Survey Fee Notes
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All survey fees are exclusive of VAT.
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Fees are guidelines only and do not constitute a quotation or offer.
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Final fees are confirmed only by written fee proposal following review of the property and inspection requirements.
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Surveys are non-intrusive unless otherwise agreed in writing.
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Services do not include costings, valuations, or guarantees unless expressly stated.
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No contract is formed unless a written professional appointment has been issued and accepted.
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Professional Standards
Surveying services are delivered in accordance with recognised professional practice, including RPSA-aligned residential survey principles, relevant British Standards, and applicable statutory guidance.
Fee Guidance & Important Notes
The examples and figures provided on this page are indicative only and are intended solely to give an overview of typical fee ranges.
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They do not constitute an offer, quotation, or contractual commitment.
All projects undertaken by Sphion are bespoke, and fees are therefore calculated on an individual project basis. Our pricing reflects a tailored, carefully considered professional service aligned with the complexity, scope, and risk profile of each commission.
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Site inspection fees are non-refundable where an appointment is cancelled without the minimum notice period specified at the time of booking.
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All prices shown are exclusive of VAT, which will be charged at the prevailing rate where applicable.
For new-build and certain complex projects, professional fees may be calculated as a percentage of the construction cost. Any such percentage will be confirmed in writing within a formal fee proposal.
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Where build costs are referenced, these are assumed estimates only and may change once the full scope, specification, and procurement route are defined.
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No contract is formed unless and until a written fee proposal and professional appointment have been formally issued and accepted.