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Your Trusted Architectural & Energy Consultancy in Ipswich
Northgate Building Design, based in Ipswich, has been delivering architectural and energy consultancy services across Suffolk and Essex for over two decades. Our team combines extensive industry experience with a commitment to providing tailored, cost-effective solutions for residential projects. From initial concept through planning and building regulation submission, we guide clients through every stage of their project. Our in-house energy consultancy team specialises in SAP calculations, compliance advice, and Energy Performance Certificates, ensuring projects meet regulatory requirements efficiently.

We prioritise clear communication, timely delivery, and practical solutions to prevent costly redesigns. With expertise in new builds, extensions, and conversions, including complex glazed structures, we offer nationwide support through desk-based calculations. Our approach balances technical precision with client-focused service, making compliance processes straightforward while maintaining design integrity.
Services
Architectural Design SAP Calculations EPC Services TM59 Calculations Energy Consultancy
Highlights and features
  • We offer 20+ years of building industry expertise
  • Our tailored service prioritises cost-effective compliance solutions
  • In-house energy consultancy streamlines regulatory processes
  • Competitive rates with no site visit requirements
  • Nationwide project support through desk-based calculations
Associations and certifications
  • On Construction Domestic Energy Assessor (OCDEA)
What people say
Excellent service First class plans Reasonably priced Simply superb Would recommend
Services
Architectural Design
Providing tailored architectural solutions for residential extensions, conversions, and new builds. Our service covers concept development, planning applications, and building regulation submissions. We specialise in integrating client visions with technical requirements to create functional, compliant spaces while maintaining design integrity throughout Suffolk and Essex.
SAP Calculations
Conducting Standard Assessment Procedure calculations for new dwellings and extensions. Our accredited assessors ensure compliance with Part L regulations through as-design and as-built assessments. We provide cost-effective solutions to achieve regulatory approval, including EPC production and compliance advice without requiring site visits for most projects.
TM59 Calculations
Delivering CIBSE TM59 dynamic thermal modelling for Part O overheating compliance. Using 3D software simulations, we assess heat gain and ventilation strategies to optimise comfort while maintaining design intent. Our service includes evaluating shading solutions and mechanical ventilation systems to meet 2021 building regulations.
EPC Services
Producing Energy Performance Certificates for completed residential projects. Our process includes detailed assessment of heating, lighting, and insulation specifications to demonstrate regulatory compliance. We provide clear guidance on improving energy efficiency ratings during both design and construction phases.
Energy Consultancy
Offering expert guidance on building regulations and energy efficiency standards. Our consultancy covers SAP/TM59 compliance strategies, specification reviews, and cost-effective compliance solutions. We support architects and homeowners nationwide through desk-based assessments, preventing costly redesigns while maintaining project timelines.
Questions
What building services do you offer in Suffolk?
We provide architectural design, SAP calculations, TM59 thermal modelling, EPC production, and energy compliance consultancy for residential projects across Suffolk and Essex.
How do SAP calculations work for extensions?
We assess extensions with over 25% glazing using comparative SAP analysis to demonstrate compliance with Part L regulations without requiring costly redesigns.
Can you handle national projects without site visits?
Yes, our desk-based assessment process allows us to complete SAP calculations and energy reports nationwide using submitted plans and specifications.
What's involved in TM59 thermal modelling?
We create 3D models to assess overheating risks, considering factors like shading, ventilation, and occupancy patterns to meet Part O requirements.
How do you ensure compliance with building regulations?
Through accredited SAP/TM59 assessments, specification reviews, and ongoing guidance from concept to completion, ensuring all regulatory standards are met efficiently.
Reviews (3)
Susan Polley
Jan 07, 2021 Report
Neil is a really good Architect who will listen to your needs and requirements for your design
We are very pleased with our Finished double extension it has Totally transformed the look of our house we will not hesitate recommending Neil to anyone looking to have your building redesigned and what a nice person he is too
Susan & Trevor
Gillian Clark
Jun 15, 2019 Report
We have found Neil Goodhall (RGP) an excellent architect. He provided a very good service, advising us on all our options and talking us through each stage of the planning stages. We wouldn't hesitate in recommending him to anyone who is looking for an architect.
David and Gill
David Sarjeant
Jan 14, 2019 Report
Anyone looking for an architect or structural consultancy should use RGP. Neil Goodall was our Architect for the extension which has just been completed. Neil provided excellent service and his plans were first class as well as reasonably priced. When it came to seeking builders Neill gave us 3 suggestions and we used MJS Building Services who have been simply superb. We honestly could not have chosen better than starting with Neil and I would always recommend him without any shadow of doubt.