18 Affordable Self Build Homes for Under £200,000 Cornish Knock Down & Rebuild: £120,000. ... Sustainable and Affordable Self Build Home: £140,000. ... Low-Cost Fisherman's Cottage: £149,800. ... Model Kit Affordable Home: £150,000. ... Rural Timber Lodge: £160,000. ... Small Island Self Build: £170,000. More items... May 21, 2023